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* memcgroup: temporarily revert swapoff modHugh Dickins2008-02-071-31/+7
| | | | | | | | | | | | | This patch precisely reverts the "swapoff: scan ptes preemptibly" patch just presented. It's a temporary measure to allow existing memory controller patches to apply without rejects: in due course they should be rendered down into one sensible patch, and this reversion disappear. Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Memory controller: add documentBalbir Singh2008-02-071-0/+259
| | | | | | | | | | | | | | | Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Pavel Emelianov <xemul@openvz.org> Cc: Paul Menage <menage@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Kirill Korotaev <dev@sw.ru> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: David Rientjes <rientjes@google.com> Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/cgroup.c: make 2 functions staticAdrian Bunk2008-02-071-2/+2
| | | | | | | | | | cgroup_is_releasable() and notify_on_release() should be static, not global inline. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cgroups: move cgroups destroy() callbacks to cgroup_diput()Paul Menage2008-02-072-23/+35
| | | | | | | | | | | | | | | | | Move the calls to the cgroup subsystem destroy() methods from cgroup_rmdir() to cgroup_diput(). This allows control file reads and writes to access their subsystem state without having to be concerned with locking against cgroup destruction - the control file dentry will keep the cgroup and its subsystem state objects alive until the file is closed. The documentation is updated to reflect the changed semantics of destroy(); additionally the locking comments for destroy() and some other methods were clarified and decrustified. Signed-off-by: Paul Menage <menage@google.com> Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cgroup simplify space strippingPaul Jackson2008-02-071-14/+3
| | | | | | | | | | Simplify the space stripping code in cgroup file write. [akpm@linux-foundation.org: s/BUG_ON/BUILD_BUG_ON/] Signed-off-by: Paul Jackson <pj@sgi.com> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cgroup brace coding style fixPaul Jackson2008-02-071-10/+5
| | | | | | | | | Coding style fix - one line conditionals don't get braces. Signed-off-by: Paul Jackson <pj@sgi.com> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/cgroup.c: remove dead codeAdrian Bunk2008-02-071-10/+8
| | | | | | | | | | | This patch removes dead code spotted by the Coverity checker (look at the "(nbytes >= PATH_MAX)" check). Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Paul Jackson <pj@sgi.com> Cc: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* email-clients.txt: sylpheed is OK at IMAPRandy Dunlap2008-02-071-1/+0
| | | | | | | | | | | | This comment is not helpful (no reason given) and is incorrect. Just stick to facts that are useful regarding working on Linux. (akpm: I've used sylpheed+imap for years) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel-doc: warn on badly formatted short descriptionRandy Dunlap2008-02-071-0/+8
| | | | | | | | | | | | | | | | Make kernel-doc warn when a function/struct/union/typedef does not contain a properly formatted short description, such as: * scsi_devinfo: set up the dynamic device list or * scsi_devinfo - This warning is only generated when verbose (-v) mode is used. Also explain the -v command line option in the -h output. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel-doc: prevent duplicate description: outputRandy Dunlap2008-02-071-1/+1
| | | | | | | | | | | | | | Prevent duplicate output of a Description: section when there is a "blank" ("*") line between the initial function name/description line and the "Description:" header. Test case: drivers/scsi/scsi_devinfo.c::scsi_init_devinfo(). Rob Landley hit this while he was producing SCSI kernel-doc. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* REPORTING-BUGS: cc the mailing list tooJ. Bruce Fields2008-02-071-5/+6
| | | | | | | | | People should also cc relevant mailing lists when reporting bugs. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation: create new scheduler/ subdirectoryJ. Bruce Fields2008-02-0710-15/+19
| | | | | | | | | | | | The top-level Documentation/ directory is unmanageably large, so we should take any obvious opportunities to move stuff into subdirectories. These sched-*.txt files seem an obvious easy case. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation: move sharedsubtrees.txt to filesystems/J. Bruce Fields2008-02-073-2/+2
| | | | | | | | | This documentation is also vfs-related. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation: move dnotify.txt to filesystems/J. Bruce Fields2008-02-073-7/+7
| | | | | | | | | I'm inclined to think dnotify belongs in filesystems/. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* move edac.txt two levels upAdrian Bunk2008-02-072-2/+2
| | | | | | | | | | There's no reason for edac.txt for being at this unusual place. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Alan Cox <alan@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add chapter IDs to z8530book.tmplRob Landley2008-02-071-6/+6
| | | | | | | | | Add chapter IDs to z8530book.tmpl Signed-off-by: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add table IDs to videobook.tmplRob Landley2008-02-071-17/+17
| | | | | | | | | Add table IDs to videobook.tmpl Signed-off-by: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add section IDs to rapidio.tmplRob Landley2008-02-071-9/+9
| | | | | | | | | Add section IDs to rapidio.tmpl Signed-off-by: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add missing IDs to procfs-guide.tmplRob Landley2008-02-071-8/+8
| | | | | | | | | Add missing IDs to procfs-guide.tmpl Signed-off-by: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add section IDs to mtdnand.tmplRob Landley2008-02-071-29/+29
| | | | | | | | | Add section IDs to mtdnand.tmpl Signed-off-by: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add missing section ID to lsm.tmplRob Landley2008-02-071-1/+1
| | | | | | | | | Add missing section ID to lsm.tmpl Signed-off-by: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add missing section IDs to genericirq.tmplRob Landley2008-02-071-13/+13
| | | | | | | | | Add missing section IDs to genericirq.tmpl Signed-off-by: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: Kill TTY_FLIPBUF_SIZEAlan Cox2008-02-071-7/+0
| | | | | | | | | This legacy define from the old buffer code is now only used in a single power pc driver than doesn't compile anyway. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: fix tty network driver interactions with TCGET/TCSET calls (x86 fix)Dave Miller2008-02-071-29/+45
| | | | | | | | | | | And to go with it Dave's type checking x86 termios headers. I've updated these as the original sent by Dave had some wrong types in it. Signed-off-by: Alan Cox <alan@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel-doc: fix for vunmap function prototypeRandy Dunlap2008-02-071-1/+1
| | | | | | | | | | | Fix kernel-doc function prototype parsing which was exposed by vunmap() by allowing more than one '*' before the function name. Error(linux-2.6.24-mm1//mm/vmalloc.c:438): cannot understand prototype: 'struct page **vunmap(const void *addr) ' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* VFS: factor out three helpers for FIBMAP/FIONBIO/FIOASYNC file ioctlsErez Zadok2008-02-071-54/+75
| | | | | | | | | | | Factor out file-specific ioctl code into smaller helper functions, away from file_ioctl(). This helps code readability and also reduces indentation inside case statements. Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* VFS: swap do_ioctl and vfs_ioctl namesErez Zadok2008-02-073-10/+24
| | | | | | | | | | | | | | | | | | | Rename old vfs_ioctl to do_ioctl, because the comment above it clearly indicates that it is an internal function not to be exported to modules; therefore it should have a more traditional do_XXX name. The new do_ioctl is exported in fs.h but not to modules. Rename the old do_ioctl to vfs_ioctl because the names vfs_XXX should preferably be reserved to callable VFS functions which modules may call, as many other vfs_XXX functions already do. Export the new vfs_ioctl to GPL modules so others can use it (including Unionfs and eCryptfs). Add DocBook for new vfs_ioctl. [akpm@linux-foundation.org: fix build] Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* VFS: apply coding standards to fs/ioctl.cErez Zadok2008-02-071-80/+84
| | | | | | | Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* DS1WM: decouple host IRQ and INTR active state settingsPhilipp Zabel2008-02-072-4/+6
| | | | | | | | | | | | | The DS1WM driver incorrectly infers the IAS bit (1-wire interrupt active high) from IRQ settings. There are devices that have IAS=0 but still need the IRQ to trigger on a rising edge. With this patch, machines with DS1WM that need IAS=1 have to set .active_high=1 in the ds1wm_platform_data. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Acked-by: Matt Reimer <mreimer@vpop.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* gfs2: make gfs2_glock.gl_owner_pid be a struct pid *Pavel Emelyanov2008-02-073-8/+14
| | | | | | | | | | | | | | The gl_owner_pid field is used to get the lock owning task by its pid, so make it in a proper manner, i.e. by using the struct pid pointer and pid_task() function. The pid_task() becomes exported for the gfs2 module. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* power_supply: remove capacity_level from list of sysfs attributesThadeu Lima de Souza Cascardo2008-02-071-1/+0
| | | | | | | | | | | | | | | | | | | | | | This commit: commit 8efe444038a205e79b38b7ad03878824901849a8 Author: Andres Salomon <dilinger@queued.net> Date: Wed Dec 12 14:12:56 2007 -0500 power: remove POWER_SUPPLY_PROP_CAPACITY_LEVEL Removed CAPACITY_LEVEL from every other code, leaving the array with sysfs attributes with one more entry than the number of enums in power_supply.h. This leads to some attributes containing the value of the attribute right after it. For example, temp_ambient would have the value of time_to_empty_now. In my case, I had time_to_full_avg have the value which should be in model_name, when the former was usually empty. Cc: Andres Salomon <dilinger@debian.org> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* gfs2: make gfs2_holder.gh_owner_pid be a struct pid *Pavel Emelyanov2008-02-073-9/+15
| | | | | | | | | | | | The gl_owner_pid field is used to get the holder task by its pid and check whether the current is a holder, so make it in a proper manner, i.e. via the struct pid * manipulations. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2008-02-0617-1390/+1466
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: 9p: fix p9_printfcall export 9p: transport API reorganization 9p: add remove function to trans_virtio 9p: Convert semaphore to spinlock for p9_idpool 9p: fix mmap to be read-only 9p: add support for sticky bit 9p: Fix soft lockup in virtio transport 9p: fix bug in attach-per-user 9p: block-based virtio client 9p: create transport rpc cut-thru 9p: fix bug in p9_clone_stat
| * 9p: fix p9_printfcall exportAndrew Morton2008-02-061-2/+2
| | | | | | | | | | | | | | | | ERROR: "p9_printfcall" [net/9p/9pnet_virtio.ko] undefined! Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: transport API reorganizationEric Van Hensbergen2008-02-0611-1253/+1208
| | | | | | | | | | | | | | | | | | | | This merges the mux.c (including the connection interface) with trans_fd in preparation for transport API changes. Ultimately, trans_fd will need to be rewritten to clean it up and simplify the implementation, but this reorganization is viewed as the first step. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: add remove function to trans_virtioEric Van Hensbergen2008-02-061-0/+19
| | | | | | | | | | | | | | | | | | | | | | Request from rusty: Just cleaning up patches for 2.6.25 merge, and noticed that net/9p/trans_virtio.c doesn't have a remove function. This will crash when removing the module (console doesn't have one because it can't really be removed). Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: Convert semaphore to spinlock for p9_idpoolAnthony Liguori2008-02-061-12/+8
| | | | | | | | | | | | | | | | | | | | | | | | When booting from v9fs, down_interruptible in p9_idpool_get() triggered a BUG as it was being called with IRQs disabled. A spinlock seems like the right thing to be using since the idr functions go out of their way not to sleep. This patch eliminates the BUG by converting the semaphore to a spinlock. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Acked-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: fix mmap to be read-onlyEric Van Hensbergen2008-02-061-2/+2
| | | | | | | | | | | | | | | | | | v9fs was allowing writable mmap which could lead to kernel BUG() cases. This sets the mmap function to generic_file_readonly_mmap which (correctly) returns an error to applications which open mmap for writing. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: add support for sticky bitAnthony Liguori2008-02-062-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | GDM gets unhappy if /var/gdm doesn't have the sticky bit set. This patch adds support for the sticky bit in much the same way setuid/setgid is supported. With this patch, I can launch X from a v9fs rootfs (although I quickly run out of fds in the server once gnome starts up). Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Acked-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: Fix soft lockup in virtio transportEric Van Hensbergen2008-02-061-1/+1
| | | | | | | | | | | | | | | | This fixes a poorly placed spinlock which could result in a soft lockup condition. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: fix bug in attach-per-userEric Van Hensbergen2008-02-061-2/+2
| | | | | | | | | | | | | | | | | | | | When a new user attached at a directory other than the root, he would end up in the parent directory of the cwd. This was due to a logic error in the code which attaches the user at the mount point and walks back to the cwd. This patch fixes that. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: block-based virtio clientEric Van Hensbergen2008-02-063-152/+228
| | | | | | | | | | | | | | | | This replaces the console-based virto client with a block-based client using a single request queue. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: create transport rpc cut-thruEric Van Hensbergen2008-02-062-16/+35
| | | | | | | | | | | | | | | | | | Add a new transport function which allows a cut-thru directly to the transport instead of processing request through the mux if the cut-thru exists. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: fix bug in p9_clone_statMartin Stava2008-02-061-0/+5
| | | | | | | | | | | | | | | | | | This patch fixes a bug in the copying of 9P stat information where string references weren't being updated properly. Signed-off-by: Martin Sava <martin.stava@gmail.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | docbook: dmapool: fix fatal changed filenameRandy Dunlap2008-02-061-1/+1
|/ | | | | | | | Docbook fatal error, file was moved: docproc: linux-2.6.24-git15/drivers/base/dmapool.c: No such file or directory Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds2008-02-0621-102/+193
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: x86: fix deadlock, make pgd_lock irq-safe virtio: fix trivial build bug x86: fix mttr trimming x86: delay CPA self-test and repeat it x86: fix 64-bit sections generic: add __FINITDATA x86: remove suprious ifdefs from pageattr.c x86: mark the .rodata section also NX x86: fix iret exception recovery on 64-bit cpuidle: dubious one-bit signed bitfield in cpuidle.h x86: fix sparse warnings in powernow-k8.c x86: fix sparse error in traps_32.c x86: trivial sparse/checkpatch in quirks.c x86 ptrace: disallow null cs/ss MAINTAINERS: RDC R-321x SoC maintainer brk randomization: introduce CONFIG_COMPAT_BRK brk: check the lower bound properly x86: remove X2 workaround x86: make spurious fault handler aware of large mappings x86: make traps on entry code be debuggable in user space, 64-bit
| * x86: fix deadlock, make pgd_lock irq-safeIngo Molnar2008-02-062-6/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lockdep just caught this one: ================================= [ INFO: inconsistent lock state ] 2.6.24 #38 --------------------------------- inconsistent {in-softirq-W} -> {softirq-on-W} usage. swapper/1 [HC0[0]:SC0[0]:HE1:SE1] takes: (pgd_lock){-+..}, at: [<ffffffff8022a9ea>] mm_init+0x1da/0x250 {in-softirq-W} state was registered at: [<ffffffffffffffff>] 0xffffffffffffffff irq event stamp: 394559 hardirqs last enabled at (394559): [<ffffffff80267f0a>] get_page_from_freelist+0x30a/0x4c0 hardirqs last disabled at (394558): [<ffffffff80267d25>] get_page_from_freelist+0x125/0x4c0 softirqs last enabled at (393952): [<ffffffff80232f8e>] __do_softirq+0xce/0xe0 softirqs last disabled at (393945): [<ffffffff8020c57c>] call_softirq+0x1c/0x30 other info that might help us debug this: no locks held by swapper/1. stack backtrace: Pid: 1, comm: swapper Not tainted 2.6.24 #38 Call Trace: [<ffffffff8024e1fb>] print_usage_bug+0x18b/0x190 [<ffffffff8024f55d>] mark_lock+0x53d/0x560 [<ffffffff8024fffa>] __lock_acquire+0x3ca/0xed0 [<ffffffff80250ba8>] lock_acquire+0xa8/0xe0 [<ffffffff8022a9ea>] ? mm_init+0x1da/0x250 [<ffffffff809bcd10>] _spin_lock+0x30/0x70 [<ffffffff8022a9ea>] mm_init+0x1da/0x250 [<ffffffff8022aa99>] mm_alloc+0x39/0x50 [<ffffffff8028b95a>] bprm_mm_init+0x2a/0x1a0 [<ffffffff8028d12b>] do_execve+0x7b/0x220 [<ffffffff80209776>] sys_execve+0x46/0x70 [<ffffffff8020c214>] kernel_execve+0x64/0xd0 [<ffffffff8020901e>] ? _stext+0x1e/0x20 [<ffffffff802090ba>] init_post+0x9a/0xf0 [<ffffffff809bc5f6>] ? trace_hardirqs_on_thunk+0x35/0x3a [<ffffffff8024f75a>] ? trace_hardirqs_on+0xba/0xd0 [<ffffffff8020c1a8>] ? child_rip+0xa/0x12 [<ffffffff8020bcbc>] ? restore_args+0x0/0x44 [<ffffffff8020c19e>] ? child_rip+0x0/0x12 turns out that pgd_lock has been used on 64-bit x86 in an irq-unsafe way for almost two years, since commit 8c914cb704a11460e. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * virtio: fix trivial build bugIngo Molnar2008-02-061-0/+1
| | | | | | | | | | | | | | | | | | | | fix build bug: drivers/virtio/virtio_balloon.c: In function 'fill_balloon': drivers/virtio/virtio_balloon.c:98: error: implicit declaration of function 'msleep' Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: fix mttr trimmingYinghai Lu2008-02-061-10/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pavel Emelyanov reported that his networking card did not work and bisected it down to: " The commit 093af8d7f0ba3c6be1485973508584ef081e9f93 x86_32: trim memory by updating e820 broke my e1000 card: on loading driver says that e1000: probe of 0000:04:03.0 failed with error -5 and the interface doesn't appear. " on a 32-bit kernel, base will overflow when try to do PAGE_SHIFT, and highest_addr will always less 4G. So use pfn instead of address to avoid the overflow when more than 4g RAM is installed on a 32-bit kernel. Many thanks to Pavel Emelyanov for reporting and testing it. Bisected-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Tested-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: delay CPA self-test and repeat itIngo Molnar2008-02-062-16/+53
| | | | | | | | | | | | | | | | | | | | | | delay the CPA self-test so that any impact (corruption) of user-space pagetables can be triggered. Repeat the test every 30 seconds. this would have prevented the bug fixed by 8cb2a7c1e95e472b5, at its source. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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