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* [PATCH] paravirt: remove read hazard from cowZachary Amsden2006-10-011-1/+1
| | | | | | | | | | | | | We don't want to read PTEs directly like this after they have been modified, as a lazy MMU implementation of direct page tables may not have written the updated PTE back to memory yet. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] invalidate_inode_pages2(): ignore page refcountsAndrew Morton2006-10-011-2/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | The recent fix to invalidate_inode_pages() (git commit 016eb4a) managed to unfix invalidate_inode_pages2(). The problem is that various bits of code in the kernel can take transient refs on pages: the page scanner will do this when inspecting a batch of pages, and the lru_cache_add() batching pagevecs also hold a ref. Net result is transient failures in invalidate_inode_pages2(). This affects NFS directory invalidation (observed) and presumably also block-backed direct-io (not yet reported). Fix it by reverting invalidate_inode_pages2() back to the old version which ignores the page refcounts. We may come up with something more clever later, but for now we need a 2.6.18 fix for NFS. Cc: Chuck Lever <cel@citi.umich.edu> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Support piping into commands in /proc/sys/kernel/core_patternAndi Kleen2006-10-014-38/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using the infrastructure created in previous patches implement support to pipe core dumps into programs. This is done by overloading the existing core_pattern sysctl with a new syntax: |program When the first character of the pattern is a '|' the kernel will instead threat the rest of the pattern as a command to run. The core dump will be written to the standard input of that program instead of to a file. This is useful for having automatic core dump analysis without filling up disks. The program can do some simple analysis and save only a summary of the core dump. The core dump proces will run with the privileges and in the name space of the process that caused the core dump. I also increased the core pattern size to 128 bytes so that longer command lines fit. Most of the changes comes from allowing core dumps without seeks. They are fairly straight forward though. One small incompatibility is that if someone had a core pattern previously that started with '|' they will get suddenly new behaviour. I think that's unlikely to be a real problem though. Additional background: > Very nice, do you happen to have a program that can accept this kind of > input for crash dumps? I'm guessing that the embedded people will > really want this functionality. I had a cheesy demo/prototype. Basically it wrote the dump to a file again, ran gdb on it to get a backtrace and wrote the summary to a shared directory. Then there was a simple CGI script to generate a "top 10" crashes HTML listing. Unfortunately this still had the disadvantage to needing full disk space for a dump except for deleting it afterwards (in fact it was worse because over the pipe holes didn't work so if you have a holey address map it would require more space). Fortunately gdb seems to be happy to handle /proc/pid/fd/xxx input pipes as cores (at least it worked with zsh's =(cat core) syntax), so it would be likely possible to do it without temporary space with a simple wrapper that calls it in the right way. I ran out of time before doing that though. The demo prototype scripts weren't very good. If there is really interest I can dig them out (they are currently on a laptop disk on the desk with the laptop itself being in service), but I would recommend to rewrite them for any serious application of this and fix the disk space problem. Also to be really useful it should probably find a way to automatically fetch the debuginfos (I cheated and just installed them in advance). If nobody else does it I can probably do the rewrite myself again at some point. My hope at some point was that desktops would support it in their builtin crash reporters, but at least the KDE people I talked too seemed to be happy with their user space only solution. Alan sayeth: I don't believe that piping as such as neccessarily the right model, but the ability to intercept and processes core dumps from user space is asked for by many enterprise users as well. They want to know about, capture, analyse and process core dumps, often centrally and in automated form. [akpm@osdl.org: loff_t != unsigned long] Signed-off-by: Andi Kleen <ak@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Create call_usermodehelper_pipe()Andi Kleen2006-10-012-1/+58
| | | | | | | | | | | | A new member in the ever growing family of call_usermode* functions is born. The new call_usermodehelper_pipe() function allows to pipe data to the stdin of the called user mode progam and behaves otherwise like the normal call_usermodehelp() (except that it always waits for the child to finish) Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Some cleanup in the pipe codeAndi Kleen2006-10-012-62/+96
| | | | | | | | | | | | | | | | Split the big and hard to read do_pipe function into smaller pieces. This creates new create_write_pipe/free_write_pipe/create_read_pipe functions. These functions are made global so that they can be used by other parts of the kernel. The resulting code is more generic and easier to read and has cleaner error handling and less gotos. [akpm@osdl.org: cleanup] Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/sunsu.cAmol Lad2006-10-011-0/+3
| | | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: David S. Miller <davem@sunset.davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/mux.cAmol Lad2006-10-011-0/+2
| | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/mpsc.cAmol Lad2006-10-011-0/+12
| | | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/mpc52xx_uart.cAmol Lad2006-10-011-1/+10
| | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/ip22zilog.cAmol Lad2006-10-011-1/+15
| | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/ioc4_serial.cAmol Lad2006-10-011-0/+3
| | | | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Brent Casavant <bcasavan@sgi.com> Cc: Pat Gefre <pfg@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/8250_gsc.cAmol Lad2006-10-011-0/+1
| | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ioremap balanced with iounmap for drivers/serial/8250_acorn,cAmol Lad2006-10-011-4/+5
| | | | | | | | | | | ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: x86_64 conversionHaavard Skinnemoen2006-10-011-104/+7
| | | | | | | | | | Convert x86_64 to use generic ioremap_page_range() [akpm@osdl.org: build fix] Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Acked-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: m32r conversionHaavard Skinnemoen2006-10-011-86/+7
| | | | | | | | | Convert m32r to use generic ioremap_page_range() Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: <linux-m32r@ml.linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: i386 conversionHaavard Skinnemoen2006-10-011-78/+6
| | | | | | | | | | Convert i386 to use generic ioremap_page_range() [bunk@stusta.de: build fix] Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Acked-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: cris conversionHaavard Skinnemoen2006-10-011-85/+3
| | | | | | | | | Convert CRIS to use generic ioremap_page_range() Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Acked-by: Mikael Starvik <starvik@axis.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: avr32 conversionHaavard Skinnemoen2006-10-011-114/+6
| | | | | | | | Convert AVR32 to use generic ioremap_page_range() Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: alpha conversionHaavard Skinnemoen2006-10-013-90/+13
| | | | | | | | | | | Convert Alpha to use generic ioremap_page_range() by turning __alpha_remap_area_pages() into an inline wrapper around ioremap_page_range(). Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: flush_cache_vmapHaavard Skinnemoen2006-10-011-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The existing implementation of ioremap_page_range(), which was taken from i386, does this: flush_cache_all(); /* modify page tables */ flush_tlb_all(); I think this is a bit defensive, so this patch changes the generic implementation to do: /* modify page tables */ flush_cache_vmap(start, end); instead, which is similar to what vmalloc() does. This should still be correct because we never modify existing PTEs. According to James Bottomley: The problem the flush_tlb_all() is trying to solve is to avoid stale tlb entries in the ioremap area. We're just being conservative by flushing on both map and unmap. Technically what vmalloc/vfree does (only flush the tlb on unmap) is just fine because it means that the only tlb entries in the remap area must belong to in-use mappings. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Mikael Starvik <starvik@axis.com> Cc: Andi Kleen <ak@suse.de> Cc: <linux-m32r@ml.linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: implementationHaavard Skinnemoen2006-10-013-0/+99
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a generic implementation of ioremap_page_range() in lib/ioremap.c based on the i386 implementation. It differs from the i386 version in the following ways: * The PTE flags are passed as a pgprot_t argument and must be determined up front by the arch-specific code. No additional PTE flags are added. * Uses set_pte_at() instead of set_pte() [bunk@stusta.de: warning fix] ]dhowells@redhat.com: nommu build fix] Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Mikael Starvik <starvik@axis.com> Cc: Andi Kleen <ak@suse.de> Cc: <linux-m32r@ml.linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] stack overflow safe kdump: safe smp_send_nmi_allbutself()Fernando Vazquez2006-10-011-1/+4
| | | | | | | | | | | | | | Re-implement smp_send_nmi_allbutself() so that calls to smp_processor_id (through send_IPI_allbutself) can be replaced with safe_smp_processor_id without affecting other parts of the kernel (as suggested by Eric Biederman). Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp> Looks-reasonable-to: Andi Kleen <ak@muc.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] stack overflow safe kdump: crash: use safe_smp_processor_id()Fernando Vazquez2006-10-011-2/+3
| | | | | | | | | | | | | | Substitute "smp_processor_id" with the stack overflow-safe "safe_smp_processor_id" in the reboot path to the second kernel. [akpm@osdl.org: build fix] Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp> Looks-reasonable-to: Andi Kleen <ak@muc.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] stack overflow safe kdump: safe_smp_processor_id(): voyagerFernando Vazquez2006-10-011-0/+7
| | | | | | | | | | | | "safe_smp_processor_id" implementation for i386-Voyager. Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp> Looks-reasonable-to: Andi Kleen <ak@muc.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] stack overflow safe kdump: safe_smp_processor_id()Fernando Vazquez2006-10-012-0/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a the first of a series of patch-sets aiming at making kdump more robust against stack overflows. This patch set does the following: * Add safe_smp_processor_id function to i386 architecture (this function was inspired by the x86_64 function of the same name). * Substitute "smp_processor_id" with the stack overflow-safe "safe_smp_processor_id" in the reboot path to the second kernel. This patch: On the event of a stack overflow critical data that usually resides at the bottom of the stack is likely to be stomped and, consequently, its use should be avoided. In particular, in the i386 and IA64 architectures the macro smp_processor_id ultimately makes use of the "cpu" member of struct thread_info which resides at the bottom of the stack. x86_64, on the other hand, is not affected by this problem because it benefits from the use of the PDA infrastructure. To circumvent this problem I suggest implementing "safe_smp_processor_id()" (it already exists in x86_64) for i386 and IA64 and use it as a replacement for smp_processor_id in the reboot path to the dump capture kernel. This is a possible implementation for i386. Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp> Looks-reasonable-to: Andi Kleen <ak@muc.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] r/o bind mounts: monitor zeroing of i_nlinkDave Hansen2006-10-0115-21/+26
| | | | | | | | | | | | Some filesystems, instead of simply decrementing i_nlink, simply zero it during an unlink operation. We need to catch these in addition to the decrement operations. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] r/o bind mounts: clean up OCFS2 nlink handlingMark Fasheh2006-10-011-20/+19
| | | | | | | | | | | | | | | | | | | | | | OCFS2 does some operations on i_nlink, then reverts them if some of its operations fail to complete. This does not fit in well with the drop_nlink() logic where we expect i_nlink to stay at zero once it gets there. So, delay all of the nlink operations until we're sure that the operations have completed. Also, introduce a small helper to check whether an inode has proper "unlinkable" i_nlink counts no matter whether it is a directory or regular inode. This patch is broken out from the others because it does contain some logical changes. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] r/o bind mount prepwork: inc_nlink() helperDave Hansen2006-10-0137-75/+80
| | | | | | | | | | | This is mostly included for parity with dec_nlink(), where we will have some more hooks. This one should stay pretty darn straightforward for now. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] r/o bind mounts: unlink: monitor i_nlinkDave Hansen2006-10-0128-93/+83
| | | | | | | | | | | | | | | | | When a filesystem decrements i_nlink to zero, it means that a write must be performed in order to drop the inode from the filesystem. We're shortly going to have keep filesystems from being remounted r/o between the time that this i_nlink decrement and that write occurs. So, add a little helper function to do the decrements. We'll tie into it in a bit to note when i_nlink hits zero. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] r/o bind mount prepwork: move open_namei()'s vfs_create()Dave Hansen2006-10-011-10/+20
| | | | | | | | | | | | | | | | | The code around vfs_create() in open_namei() is getting a bit too complex. Right now, there is at least the reference count on the dentry, and the i_mutex to worry about. Soon, we'll also have mnt_writecount. So, break the vfs_create() call out of open_namei(), and into a helper function. This duplicates the call to may_open(), but that isn't such a bad thing since the arguments (acc_mode and flag) were being heavily massaged anyway. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] r/o bind mounts: prepare for write access checks: collapse if()Dave Hansen2006-10-012-70/+87
| | | | | | | | | | | | | We're shortly going to be adding a bunch more permission checks in these functions. That requires adding either a bunch of new if() conditions, or some gotos. This patch collapses existing if()s and uses gotos instead to prepare for the upcoming changes. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] csa accounting taskstats updateJay Lan2006-10-014-21/+207
| | | | | | | | | | | | | | | | | | | | | | | | | | | | ChangeLog: Feedbacks from Andrew Morton: - define TS_COMM_LEN to 32 - change acct_stimexpd field of task_struct to be of cputime_t, which is to be used to save the tsk->stime of last timer interrupt update. - a new Documentation/accounting/taskstats-struct.txt to describe fields of taskstats struct. Feedback from Balbir Singh: - keep the stime of a task to be zero when both stime and utime are zero as recoreded in task_struct. Misc: - convert accumulated RSS/VM from platform dependent pages-ticks to MBytes-usecs in the kernel Cc: Shailabh Nagar <nagar@watson.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Chris Sturtivant <csturtiv@sgi.com> Cc: Tony Ernst <tee@sgi.com> Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] csa: convert CONFIG tag for extended accounting routinesJay Lan2006-10-0110-38/+42
| | | | | | | | | | | | | | | | | | There were a few accounting data/macros that are used in CSA but are #ifdef'ed inside CONFIG_BSD_PROCESS_ACCT. This patch is to change those ifdef's from CONFIG_BSD_PROCESS_ACCT to CONFIG_TASK_XACCT. A few defines are moved from kernel/acct.c and include/linux/acct.h to kernel/tsacct.c and include/linux/tsacct_kern.h. Signed-off-by: Jay Lan <jlan@sgi.com> Cc: Shailabh Nagar <nagar@watson.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Chris Sturtivant <csturtiv@sgi.com> Cc: Tony Ernst <tee@sgi.com> Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] csa: Extended system accounting over taskstatsJay Lan2006-10-015-0/+52
| | | | | | | | | | | | | | | Add extended system accounting handling over taskstats interface. A CONFIG_TASK_XACCT flag is created to enable the extended accounting code. Signed-off-by: Jay Lan <jlan@sgi.com> Cc: Shailabh Nagar <nagar@watson.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Chris Sturtivant <csturtiv@sgi.com> Cc: Tony Ernst <tee@sgi.com> Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] csa: basic accounting over taskstatsJay Lan2006-10-015-6/+120
| | | | | | | | | | | | | | | | | Add some basic accounting fields to the taskstats struct, add a new kernel/tsacct.c to handle basic accounting data handling upon exit. A handle is added to taskstats.c to invoke the basic accounting data handling. Signed-off-by: Jay Lan <jlan@sgi.com> Cc: Shailabh Nagar <nagar@watson.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Jes Sorensen <jes@sgi.com> Cc: Chris Sturtivant <csturtiv@sgi.com> Cc: Tony Ernst <tee@sgi.com> Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net> Cc: "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix getdelays.c - cpumask length and error reportingBalbir Singh2006-10-011-3/+4
| | | | | | | | | | | | | | | | | | Fix the length passed while (un)registering cpumask. We were passing sizeof the array, make it strlen(). Error value printed in fatal errors should be derived from the message. The message contains an nlmsgerr embedded with an error value. We must report that value to the user. Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jamal Hadi <hadi@cyberus.ca> Cc: Shailabh Nagar <nagar@watson.ibm.com> Cc: Thomas Graf <tgraf@suug.ch> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix taskstats size calculation (use the new genetlink utility functions)Balbir Singh2006-10-011-1/+1
| | | | | | | | | | | | | | | | | The addition of the CSA patch pushed the size of struct taskstats to 256 bytes. This exposed a problem with prepare_reply(), we were not allocating space for the netlink and genetlink header. It worked earlier because alloc_skb() would align the skb to SMP_CACHE_BYTES, which added some additonal bytes. Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jamal Hadi <hadi@cyberus.ca> Cc: Shailabh Nagar <nagar@watson.ibm.com> Cc: Thomas Graf <tgraf@suug.ch> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Add genetlink utilities for payload length calculationBalbir Singh2006-10-011-0/+18
| | | | | | | | | | | | | | Add two utility helper functions genlmsg_msg_size() and genlmsg_total_size(). These functions are derived from their netlink counterparts. Signed-off-by: Balbir Singh <balbir@in.ibm.com> Cc: Jamal Hadi <hadi@cyberus.ca> Cc: Shailabh Nagar <nagar@watson.ibm.com> Cc: Thomas Graf <tgraf@suug.ch> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jay Lan <jlan@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] clean up unused kiocb variablesChen, Kenneth W2006-10-011-2/+0
| | | | | | | | | Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Acked-by: Zach Brown <zach.brown@oracle.com> Cc: Suparna Bhattacharya <suparna@in.ibm.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Add vector AIO supportBadari Pulavarty2006-10-015-108/+203
| | | | | | | | | | | | | | | This work is initially done by Zach Brown to add support for vectored aio. These are the core changes for AIO to support IOCB_CMD_PREADV/IOCB_CMD_PWRITEV. [akpm@osdl.org: huge build fix] Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Acked-by: Benjamin LaHaise <bcrl@kvack.org> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Streamline generic_file_* interfaces and filemap cleanupsBadari Pulavarty2006-10-0127-165/+105
| | | | | | | | | | | | | | | | | | | | | | This patch cleans up generic_file_*_read/write() interfaces. Christoph Hellwig gave me the idea for this clean ups. In a nutshell, all filesystems should set .aio_read/.aio_write methods and use do_sync_read/ do_sync_write() as their .read/.write methods. This allows us to cleanup all variants of generic_file_* routines. Final available interfaces: generic_file_aio_read() - read handler generic_file_aio_write() - write handler generic_file_aio_write_nolock() - no lock write handler __generic_file_aio_write_nolock() - internal worker routine Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Remove readv/writev methods and use aio_read/aio_write insteadBadari Pulavarty2006-10-0121-388/+154
| | | | | | | | | | This patch removes readv() and writev() methods and replaces them with aio_read()/aio_write() methods. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Vectorize aio_read/aio_write fileop methodsBadari Pulavarty2006-10-0122-191/+242
| | | | | | | | | | | | This patch vectorizes aio_read() and aio_write() methods to prepare for collapsing all aio & vectored operations into one interface - which is aio_read()/aio_write(). Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Michael Holzheu <HOLZHEU@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: eliminate minimum window size for bitmap searchingJeff Mahoney2006-10-011-22/+1
| | | | | | | | | | | | | | | | | | | | When a file system becomes fragmented (using MythTV, for example), the bigalloc window searching ends up causing huge performance problems. In a file system presented by a user experiencing this bug, the file system was 90% free, but no 32-block free windows existed on the entire file system. This causes the allocator to scan the entire file system for each 128k write before backing down to searching for individual blocks. In the end, finding a contiguous window for all the blocks in a write is an advantageous special case, but one that can be found naturally when such a window exists anyway. This patch removes the bigalloc window searching, and has been proven to fix the test case described above. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: use generic_file_open for open() checksJeff Mahoney2006-10-011-0/+1
| | | | | | | | | | | | | | | | | The other common disk-based file systems (I checked ext[23], xfs, jfs) check to ensure that opens of files > 2 GB fail unless O_LARGEFILE is specified. They check via generic_file_open or their own open routine. ReiserFS doesn't have an f_op->open defined, and as such, it's possible to open files > 2 GB without O_LARGEFILE. This patch adds the f_op->open member to conform with the expected behavior. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: <reiserfs-dev@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: on-demand bitmap loadingJeff Mahoney2006-10-014-91/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | This is the patch the three previous ones have been leading up to. It changes the behavior of ReiserFS from loading and caching all the bitmaps as special, to treating the bitmaps like any other bit of metadata and just letting the system-wide caches figure out what to hang on to. Buffer heads are allocated on the fly, so there is no need to retain pointers to all of them. The caching of the metadata occurs when the data is read and updated, and is considered invalid and uncached until then. I needed to remove the vs-4040 check for performing a duplicate operation on a particular bit. The reason is that while the other sites for working with bitmaps are allowed to schedule, is_reusable() is called from do_balance(), which will panic if a schedule occurs in certain places. The benefit of on-demand bitmaps clearly outweighs a sanity check that depends on a compile-time option that is discouraged. [akpm@osdl.org: warning fix] Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: <reiserfs-dev@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: reorganize bitmap loading functionsJeff Mahoney2006-10-014-113/+94
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch moves the bitmap loading code from super.c to bitmap.c The code is also restructured somewhat. The only difference between new format bitmaps and old format bitmaps is where they are. That's a two liner before loading the block to use the correct one. There's no need for an entirely separate code path. The load path is generally the same, with the pattern being to throw out a bunch of requests and then wait for them, then cache the metadata from the contents. Again, like the previous patches, the purpose is to set up for later ones. Update: There was a bug in the previously posted version of this that resulted in corruption. The problem was that bitmap 0 on new format file systems must be treated specially, and wasn't. A stupid bug with an easy fix. This is hopefully the last fix for the disaster that is the reiserfs bitmap patch set. If a bitmap block was full, first_zero_hint would end up at zero since it would never be changed from it's zeroed out value. This just sets it beyond the end of the bitmap block. If any bits are freed, it will be reset to a valid bit. When info->free_count = 0, then we already know it's full. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: <reiserfs-dev@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: clean up bitmap block buffer head referencesJeff Mahoney2006-10-012-49/+71
| | | | | | | | | | | | | | | | | | Similar to the SB_JOURNAL cleanup that was accepted a while ago, this patch uses a temporary variable for buffer head references from the bitmap info array. This makes the code much more readable in some areas. It also uses proper reference counting, doing a get_bh() after using the pointer from the array and brelse()'ing it later. This may seem silly, but a later patch will replace the simple temporary variables with an actual read, so the reference freeing will be used then. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: <reiserfs-dev@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: fix is_reusable bitmap check to not traverse the bitmap ↵Jeff Mahoney2006-10-013-15/+28
| | | | | | | | | | | | | | | | | | | | info array There is a check in is_reusable to determine if a particular block is a bitmap block. It verifies this by going through the array of bitmap block buffer heads and comparing the block number to each one. Bitmap blocks are at defined locations on the disk in both old and current formats. Simply checking against the known good values is enough. This is a trivial optimization for a non-production codepath, but this is the first in a series of patches that will ultimately remove the buffer heads from that array. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: <reiserfs-dev@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] kill wall_jiffiesAtsushi Nemoto2006-10-0126-190/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With 2.6.18-rc4-mm2, now wall_jiffies will always be the same as jiffies. So we can kill wall_jiffies completely. This is just a cleanup and logically should not change any real behavior except for one thing: RTC updating code in (old) ppc and xtensa use a condition "jiffies - wall_jiffies == 1". This condition is never met so I suppose it is just a bug. I just remove that condition only instead of kill the whole "if" block. [heiko.carstens@de.ibm.com: s390 build fix and cleanup] Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Hirokazu Takata <takata.hirokazu@renesas.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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