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| | * ext4: don't bump up LONG_MAX nr_to_write by a factor of 8Eric Sandeen2010-10-271-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | I'm uneasy with lots of stuff going on in ext4_da_writepages(), but bumping nr_to_write from LLONG_MAX to -8 clearly isn't making anything better, so avoid the multiplier in that case. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| | * ext4: stop looping in ext4_num_dirty_pages when max_pages reachedEric Sandeen2010-10-271-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Today we simply break out of the inner loop when we have accumulated max_pages; this keeps scanning forwad and doing pagevec_lookup_tag() in the while (!done) loop, this does potentially a lot of work with no net effect. When we have accumulated max_pages, just clean up and return. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| | * ext4: use dedicated slab caches for group_info structuresCurt Wohlgemuth2010-10-272-21/+78
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ext4_group_info structures are currently allocated with kmalloc(). With a typical 4K block size, these are 136 bytes each -- meaning they'll each consume a 256-byte slab object. On a system with many ext4 large partitions, that's a lot of wasted kernel slab space. (E.g., a single 1TB partition will have about 8000 block groups, using about 2MB of slab, of which nearly 1MB is wasted.) This patch creates an array of slab pointers created as needed -- depending on the superblock block size -- and uses these slabs to allocate the group info objects. Google-Bug-Id: 2980809 Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| | * jbd2: Fix I/O hang in jbd2_journal_release_jbd_inodeBrian King2010-10-272-5/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a hang seen in jbd2_journal_release_jbd_inode on a lot of Power 6 systems running with ext4. When we get in the hung state, all I/O to the disk in question gets blocked where we stay indefinitely. Looking at the task list, I can see we are stuck in jbd2_journal_release_jbd_inode waiting on a wake up. I added some debug code to detect this scenario and dump additional data if we were stuck in jbd2_journal_release_jbd_inode for longer than 30 minutes. When it hit, I was able to see that i_flags was 0, suggesting we missed the wake up. This patch changes i_flags to be an unsigned long, uses bit operators to access it, and adds barriers around the accesses. Prior to applying this patch, we were regularly hitting this hang on numerous systems in our test environment. After applying the patch, the hangs no longer occur. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| | * ext4: fix EOFBLOCKS_FL handlingTheodore Ts'o2010-10-271-29/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It turns out we have several problems with how EOFBLOCKS_FL is handled. First of all, there was a fencepost error where we were not clearing the EOFBLOCKS_FL when fill in the last uninitialized block, but rather when we allocate the next block _after_ the uninitalized block. Secondly we were not testing to see if we needed to clear the EOFBLOCKS_FL when writing to the file O_DIRECT or when were converting an uninitialized block (which is the most common case). Google-Bug-Id: 2928259 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* | | Merge branch 'for_linus' of ↵Linus Torvalds2010-10-2715-69/+137
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: (24 commits) quota: Fix possible oops in __dquot_initialize() ext3: Update kernel-doc comments jbd/2: fixed typos ext2: fixed typo. ext3: Fix debug messages in ext3_group_extend() jbd: Convert atomic_inc() to get_bh() ext3: Remove misplaced BUFFER_TRACE() in ext3_truncate() jbd: Fix debug message in do_get_write_access() jbd: Check return value of __getblk() ext3: Use DIV_ROUND_UP() on group desc block counting ext3: Return proper error code on ext3_fill_super() ext3: Remove unnecessary casts on bh->b_data ext3: Cleanup ext3_setup_super() quota: Fix issuing of warnings from dquot_transfer quota: fix dquot_disable vs dquot_transfer race v2 jbd: Convert bitops to buffer fns ext3/jbd: Avoid WARN() messages when failing to write the superblock jbd: Use offset_in_page() instead of manual calculation jbd: Remove unnecessary goto statement jbd: Use printk_ratelimited() in journal_alloc_journal_head() ...
| * | quota: Fix possible oops in __dquot_initialize()Jan Kara2010-10-281-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | When quotaon(8) races with __dquot_initialize() or dqget() fails because of EIO, ENOSPC, or similar error, we could possibly dereference NULL pointer in inode->i_dquot[cnt]. Add proper checking. Reported-by: Dmitry Monakhov <dmonakhov@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Update kernel-doc commentsNamhyung Kim2010-10-282-12/+20
| | | | | | | | | | | | | | | | | | | | | Update missing/broken argument descriptions and fix formatting. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd/2: fixed typosAndrea Gelmini2010-10-282-2/+2
| | | | | | | | | | | | | | | | | | | | | "wakup" Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext2: fixed typo.Andrea Gelmini2010-10-281-1/+1
| | | | | | | | | | | | | | | | | | | | | "excpet" Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Fix debug messages in ext3_group_extend()Namhyung Kim2010-10-281-6/+7
| | | | | | | | | | | | | | | | | | | | | Fix a typo, break long lines and use E3FSBLK on ext3_fsblk_t. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Convert atomic_inc() to get_bh()Namhyung Kim2010-10-282-3/+3
| | | | | | | | | | | | | | | | | | | | | Convert atomic_inc(&bh->b_count) to get_bh(bh) for consistency. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Remove misplaced BUFFER_TRACE() in ext3_truncate()Namhyung Kim2010-10-281-1/+0
| | | | | | | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Fix debug message in do_get_write_access()Namhyung Kim2010-10-281-1/+1
| | | | | | | | | | | | | | | | | | | | | 'buffer_head' should be 'journal_head'. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Check return value of __getblk()Namhyung Kim2010-10-281-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fail journal creation if __getblk() returns NULL. unlikely() is added because it is called in a loop and we've been OK without the check until now. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Use DIV_ROUND_UP() on group desc block countingNamhyung Kim2010-10-281-2/+1
| | | | | | | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Return proper error code on ext3_fill_super()Namhyung Kim2010-10-281-0/+2
| | | | | | | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Remove unnecessary casts on bh->b_dataNamhyung Kim2010-10-282-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | bh->b_data is already a pointer to char so casts to 'char *' should be meaningless. Remove them. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Cleanup ext3_setup_super()Namhyung Kim2010-10-281-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fix mount-count check to emit warning only if s_max_mnt_count is greater than 0 according to man tune2fs(8). Also removes unnecessary casts. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | quota: Fix issuing of warnings from dquot_transferJan Kara2010-10-281-7/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | __dquot_transfer accidentally called flush_warnings for a wrong set of dquots which could result in quota warnings being issued with a wrong identification. Also when operation fails because of EDQUOT, there's no need check for issuing information message about user getting below limits (no transfer has actually happened). Signed-off-by: Jan Kara <jack@suse.cz>
| * | quota: fix dquot_disable vs dquot_transfer race v2Dmitry2010-10-281-6/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've got following lockup: dquot_disable dquot_transfer ->dqget() sb_has_quota_active dqopt->flags &= ~dquot_state_flag(f, cnt) atomic_inc(dq->dq_count) ->drop_dquot_ref(sb, cnt); down_write(dqptr_sem) inode->i_dquot[cnt] = NULL ->__dquot_transfer invalidate_dquots(sb, cnt); down_write(&dqptr_sem) ->wait for dq_wait_unused inode->i_dquot = new_dquot /* wait forever */ ^^^^New quota user^^^^^^ We cannot allow new references to dquots from inodes after drop_dquot_ref() has removed them. We have to recheck quota state under dqptr_sem and before assignment, as we do it in dquot_initialize(). Signed-off-by: Dmitry Monakhov <dmonakhov@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Convert bitops to buffer fnsNamhyung Kim2010-10-281-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | Convert set/clear_bit(BH_JWrite, ...) to set/clear_buffer_jwrite() for consistency. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3/jbd: Avoid WARN() messages when failing to write the superblockDarrick J. Wong2010-10-282-3/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a WARN backtrace in mark_buffer_dirty() that occurs during unmount when the underlying block device is removed. This bug has been seen on System Z when removing all paths from a multipath-backed ext3 mount; on System P when injecting enough PCI EEH errors to make the SCSI controller go offline; and similar warnings have been seen (and patched) with ext2/ext4. The super block update from a previous operation has marked the buffer as in error, and the flag has to be cleared before doing the update. Similar changes have been made to ext4 by commit 914258bf2cb22bf4336a1b1d90c551b4b11ca5aa. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Use offset_in_page() instead of manual calculationNamhyung Kim2010-10-281-1/+1
| | | | | | | | | | | | | | | Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Remove unnecessary goto statementNamhyung Kim2010-10-281-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | Remove goto statement which jumps to very next line. Also remove target label because it is no longer used anywhere. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Use printk_ratelimited() in journal_alloc_journal_head()Namhyung Kim2010-10-281-6/+4
| | | | | | | | | | | | | | | | | | | | | Use printk_ratelimited() instead of doing it manually. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | jbd: Move debug message into #ifdef areaNamhyung Kim2010-10-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move call to jbd_debug() into #ifdef CONFIG_JBD_DEBUG block because 'dropped' is declared there. The code could be compiled without this change anyway, simply because jbd_debug() expands to nothing if !CONFIG_JBD_DEBUG but IMHO it doesn't look good in general. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext2: fix comment on ext2_try_to_allocate()Namhyung Kim2010-10-281-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | @handle doesn't exist in ext2. Remove it. Also, fit comment header into kernel-doc format. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * | ext3: Fix lost extented attributes for inode with ino == 11Jan Kara2010-10-051-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a filesystem has inode size > 128 and someone deletes lost+found and reuses inode 11 for some other file, extented attributes set for this inode before umount will get lost after remounting the filesystem. This is because extended attributes will get stored in an inode but ext3_iget will ignore them due to workaround of a bug in an old mkfs. Fix the problem by initializing i_extra_isize to 0 for freshly allocated inodes where mkfs workaround in ext3_iget applies. This way these inodes will always store extended attributes in a special block and no problems occur. The bug was spotted and a reproduction test provided by: Masayoshi MIZUMA <m.mizuma@jp.fujitsu.com> Reviewed-by: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Jan Kara <jack@suse.cz>
| * | quota: Make QUOTACTL config be selected by its usersJan Kara2010-10-052-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | Remove "depends on" line from QUOTACTL config option and rather select the option explicitely from config options which need it. It makes more sense this way and also fixes Kconfig warning due to GFS2 selecting QUOTACTL but QUOTACTL not depending on it. Signed-off-by: Jan Kara <jack@suse.cz>
* | | Merge branch 'akpm-incoming-2'Linus Torvalds2010-10-2710-111/+181
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * akpm-incoming-2: (139 commits) epoll: make epoll_wait() use the hrtimer range feature select: rename estimate_accuracy() to select_estimate_accuracy() Remove duplicate includes from many files ramoops: use the platform data structure instead of module params kernel/resource.c: handle reinsertion of an already-inserted resource kfifo: fix kfifo_alloc() to return a signed int value w1: don't allow arbitrary users to remove w1 devices alpha: remove dma64_addr_t usage mips: remove dma64_addr_t usage sparc: remove dma64_addr_t usage fuse: use release_pages() taskstats: use real microsecond granularity for CPU times taskstats: split fill_pid function taskstats: separate taskstats commands delayacct: align to 8 byte boundary on 64-bit systems delay-accounting: reimplement -c for getdelays.c to report information on a target command namespaces Kconfig: move namespace menu location after the cgroup namespaces Kconfig: remove the cgroup device whitelist experimental tag namespaces Kconfig: remove pointless cgroup dependency namespaces Kconfig: make namespace a submenu ...
| * | | epoll: make epoll_wait() use the hrtimer range featureShawn Bohrer2010-10-272-17/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This make epoll use hrtimers for the timeout value which prevents epoll_wait() from timing out up to a millisecond early. This mirrors the behavior of select() and poll(). Signed-off-by: Shawn Bohrer <shawn.bohrer@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Davide Libenzi <davidel@xmailserver.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | select: rename estimate_accuracy() to select_estimate_accuracy()Andrew Morton2010-10-271-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make it a subsystem-specific identifier because we wish to amke it non-static in the next patch ("epoll: make epoll_wait() use the hrtimer range feature"). Cc: Shawn Bohrer <shawn.bohrer@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | fuse: use release_pages()Miklos Szeredi2010-10-271-6/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace iterated page_cache_release() with release_pages(), which is faster and shorter. Needs release_pages() to be exported to modules. Suggested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | exec: don't turn PF_KTHREAD off when a target command was not foundKOSAKI Motohiro2010-10-271-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Presently do_execve() turns PF_KTHREAD off before search_binary_handler(). THis has a theorical risk of PF_KTHREAD getting lost. We don't have to turn PF_KTHREAD off in the ENOEXEC case. This patch moves this flag modification to after the finding of the executable file. This is only a theorical issue because kthreads do not call do_execve() directly. But fixing would be better. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Roland McGrath <roland@redhat.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | /proc/stat: fix scalability of irq sum of all cpuKAMEZAWA Hiroyuki2010-10-271-8/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In /proc/stat, the number of per-IRQ event is shown by making a sum each irq's events on all cpus. But we can make use of kstat_irqs(). kstat_irqs() do the same calculation, If !CONFIG_GENERIC_HARDIRQ, it's not a big cost. (Both of the number of cpus and irqs are small.) If a system is very big and CONFIG_GENERIC_HARDIRQ, it does for_each_irq() for_each_cpu() - look up a radix tree - read desc->irq_stat[cpu] This seems not efficient. This patch adds kstat_irqs() for CONFIG_GENRIC_HARDIRQ and change the calculation as for_each_irq() look up radix tree for_each_cpu() - read desc->irq_stat[cpu] This reduces cost. A test on (4096cpusp, 256 nodes, 4592 irqs) host (by Jack Steiner) %time cat /proc/stat > /dev/null Before Patch: 2.459 sec After Patch : .561 sec [akpm@linux-foundation.org: unexport kstat_irqs, coding-style tweaks] [akpm@linux-foundation.org: fix unused variable 'per_irq_sum'] Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Tested-by: Jack Steiner <steiner@sgi.com> Acked-by: Jack Steiner <steiner@sgi.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | /proc/stat: scalability of irq num per cpuKAMEZAWA Hiroyuki2010-10-271-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | /proc/stat shows the total number of all interrupts to each cpu. But when the number of IRQs are very large, it take very long time and 'cat /proc/stat' takes more than 10 secs. This is because sum of all irq events are counted when /proc/stat is read. This patch adds "sum of all irq" counter percpu and reduce read costs. The cost of reading /proc/stat is important because it's used by major applications as 'top', 'ps', 'w', etc.... A test on a mechin (4096cpu, 256 nodes, 4592 irqs) shows %time cat /proc/stat > /dev/null Before Patch: 12.627 sec After Patch: 2.459 sec Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Tested-by: Jack Steiner <steiner@sgi.com> Acked-by: Jack Steiner <steiner@sgi.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | procfs: fix /proc/softirqs formattingDavidlohr Bueso2010-10-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The length of the BLOCK_IPOLL string is making i's value be printed too far to the right. This patch fixes this and makes the output a bit neater. Currently: CPU0 HI: 0 TIMER: 599792 NET_TX: 2 NET_RX: 6 BLOCK: 80807 BLOCK_IOPOLL: 0 TASKLET: 20012 SCHED: 0 HRTIMER: 63 RCU: 619279 With patch: CPU0 HI: 0 TIMER: 585582 NET_TX: 2 NET_RX: 6 BLOCK: 80320 BLOCK_IOPOLL: 0 TASKLET: 19287 SCHED: 0 HRTIMER: 62 RCU: 604441 Signed-off-by: Davidlohr Bueso <dave@gnu.org> Acked-by: Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | /proc/pid/smaps: export amount of anonymous memory in a mappingNikanth Karthikesan2010-10-271-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Export the number of anonymous pages in a mapping via smaps. Even the private pages in a mapping backed by a file, would be marked as anonymous, when they are modified. Export this information to user-space via smaps. Exporting this count will help gdb to make a better decision on which areas need to be dumped in its coredump; and should be useful to others studying the memory usage of a process. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> Acked-by: Hugh Dickins <hughd@google.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | coredump: default CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=yRoland McGrath2010-10-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The userland ELF tools have been coping with partial-segments core files for a few years now. Multiple distro builds are now setting this option. It behooves everyone who ever deals with core files to have more info dumped in there, especially as more and more people's compilers are producing build IDs. Make it the default. Anyone using older tools confused by these core files can configure this option off, or just change /proc/PID/coredump_filter after boot. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | core_pattern: fix truncation by core_pattern handler with long parametersXiaotian Feng2010-10-271-60/+95
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We met a parameter truncated issue, consider following: > echo "|/root/core_pattern_pipe_test %p /usr/libexec/blah-blah-blah \ %s %c %p %u %g 11 12345678901234567890123456789012345678 %t" > \ /proc/sys/kernel/core_pattern This is okay because the strings is less than CORENAME_MAX_SIZE. "cat /proc/sys/kernel/core_pattern" shows the whole string. but after we run core_pattern_pipe_test in man page, we found last parameter was truncated like below: argc[10]=<12807486> The root cause is core_pattern allows % specifiers, which need to be replaced during parse time, but the replace may expand the strings to larger than CORENAME_MAX_SIZE. So if the last parameter is % specifiers, the replace code is using snprintf(out_ptr, out_end - out_ptr, ...), this will write out of corename array. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Xiaotian Feng <dfeng@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Neil Horman <nhorman@tuxdriver.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | signals: move cred_guard_mutex from task_struct to signal_structKOSAKI Motohiro2010-10-272-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Oleg Nesterov pointed out we have to prevent multiple-threads-inside-exec itself and we can reuse ->cred_guard_mutex for it. Yes, concurrent execve() has no worth. Let's move ->cred_guard_mutex from task_struct to signal_struct. It naturally prevent multiple-threads-inside-exec. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Roland McGrath <roland@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | isofs: work-around for Rock Ridge+Joliet CDs with empty ISO root directoryOndrej Zary2010-10-271-0/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a CD has both Rock Ridge and Joliet extensions and the ISO root directory is empty, no files are visible. Disable Rock Ridge extensions in this case and use Joliet root directory instead. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | fasync: Fix placement of FASYNC flag commentLinus Torvalds2010-10-271-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit f7347ce4ee7c ("fasync: re-organize fasync entry insertion to allow it under a spinlock") Arnd took an earlier patch of mine that had the comment about the FASYNC flag above the wrong function. When the fasync_add_entry() function was split to introduce the new fasync_insert_entry() helper function, the code that actually cares about the FASYNC bit moved to that new helper. So just move the comment to the right point. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Merge branch 'flock' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bklLinus Torvalds2010-10-279-70/+108
|\ \ \ \ | |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | * 'flock' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: locks: turn lock_flocks into a spinlock fasync: re-organize fasync entry insertion to allow it under a spinlock locks/nfsd: allocate file lock outside of spinlock lockd: fix nlmsvc_notify_blocked locking lockd: push lock_flocks down
| * | | locks: turn lock_flocks into a spinlockArnd Bergmann2010-10-272-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nothing depends on lock_flocks using the BKL any more, so we can do the switch over to a private spinlock. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| * | | fasync: re-organize fasync entry insertion to allow it under a spinlockLinus Torvalds2010-10-272-17/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | You currently cannot use "fasync_helper()" in an atomic environment to insert a new fasync entry, because it will need to allocate the new "struct fasync_struct". Yet fcntl_setlease() wants to call this under lock_flocks(), which is in the process of being converted from the BKL to a spinlock. In order to fix this, this abstracts out the actual fasync list insertion and the fasync allocations into functions of their own, and teaches fs/locks.c to pre-allocate the fasync_struct entry. That way the actual list insertion can happen while holding the required spinlock. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [bfields@redhat.com: rebase on top of my changes to Arnd's patch] Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| * | | locks/nfsd: allocate file lock outside of spinlockArnd Bergmann2010-10-272-35/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As suggested by Christoph Hellwig, this moves allocation of new file locks out of generic_setlease into the callers, nfs4_open_delegation and fcntl_setlease in order to allow GFP_KERNEL allocations when lock_flocks has become a spinlock. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: J. Bruce Fields <bfields@redhat.com>
| * | | lockd: fix nlmsvc_notify_blocked lockingJ. Bruce Fields2010-10-271-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nlmsvc_notify_blocked walks the nlm_blocked list, which requires nlm_blocked_lock. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| * | | lockd: push lock_flocks downArnd Bergmann2010-10-274-14/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lockd should use lock_flocks() instead of lock_kernel() to lock against posix locks accessing the i_flock list. This is a prerequisite to turning lock_flocks into a spinlock. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: J. Bruce Fields <bfields@redhat.com>
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