- 13 Feb, 2009 2 commits
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Ingo Molnar authored
Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
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Ingo Molnar authored
Merge branches 'tracing/ftrace', 'tracing/ring-buffer', 'tracing/sysprof', 'tracing/urgent' and 'linus' into tracing/core
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- 12 Feb, 2009 5 commits
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Steven Rostedt authored
Impact: clean up While reviewing the ring buffer code, I thougth I saw a bug with if (!__raw_spin_trylock(&cpu_buffer->lock)) goto out_unlock; But I forgot that we use a variable "lock_taken" that is set if the spinlock is taken, and only unlock it if that variable is set. To avoid further confusion from other reviewers, this patch renames the label out_unlock with out_reset, which is the more appropriate name. Signed-off-by:Steven Rostedt <srostedt@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: mm: Export symbol ksize()
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Nick Piggin authored
A bug was introduced into write_cache_pages cyclic writeout by commit 31a12666 ("mm: write_cache_pages cyclic fix"). The intention (and comments) is that we should cycle back and look for more dirty pages at the beginning of the file if there is no more work to be done. But the !done condition was dropped from the test. This means that any time the page writeout loop breaks (eg. due to nr_to_write == 0), we will set index to 0, then goto again. This will set done_index to index, then find done is set, so will proceed to the end of the function. When updating mapping->writeback_index for cyclic writeout, we now use done_index == 0, so we're always cycling back to 0. This seemed to be causing random mmap writes (slapadd and iozone) to start writing more pages from the LRU and writeout would slowdown, and caused bugzilla entry http://bugzilla.kernel.org/show_bug.cgi?id=12604 about Berkeley DB slowing down dramatically. With this patch, iozone random write performance is increased nearly 5x on my system (iozone -B -r 4k -s 64k -s 512m -s 1200m on ext2). Signed-off-by:
Nick Piggin <npiggin@suse.de> Reported-and-tested-by:
Jan Kara <jack@suse.cz> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kirill A. Shutemov authored
Commit 7b2cd92a ("crypto: api - Fix zeroing on free") added modular user of ksize(). Export that to fix crypto.ko compilation. Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi>
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git://git.infradead.org/users/cbou/battery-2.6.29Linus Torvalds authored
* git://git.infradead.org/users/cbou/battery-2.6.29: pcf50633_charger: Fix typo
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- 11 Feb, 2009 33 commits
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Ian Dall authored
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=12646 When the temperature exceeds 32767 milli-degrees the temperature overflows to -32768 millidegrees. These are bothe well within the -55 - +125 degree range for the sensor. Fix overflow in left-shift of a u8. Signed-off-by:
Ian Dall <ian@beware.dropbear.id.au> Signed-off-by:
Evgeniy Polyakov <zbr@ioremap.net> Cc: <stable@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Paul Clements authored
Fix a problem that causes I/O to a disconnected (or partially initialized) nbd device to hang indefinitely. To reproduce: # ioctl NBD_SET_SIZE_BLOCKS /dev/nbd23 514048 # dd if=/dev/nbd23 of=/dev/null bs=4096 count=1 ...hangs... This can also occur when an nbd device loses its nbd-client/server connection. Although we clear the queue of any outstanding I/Os after the client/server connection fails, any additional I/Os that get queued later will hang. This bug may also be the problem reported in this bug report: http://bugzilla.kernel.org/show_bug.cgi?id=12277 Testing would need to be performed to determine if the two issues are the same. This problem was introduced by the new request handling thread code ("NBD: allow nbd to be used locally", 3/2008), which entered into mainline around 2.6.25. The fix, which is fairly simple, is to restore the check for lo->sock being NULL in do_nbd_request. This causes I/O to an uninitialized nbd to immediately fail with an I/O error, as it did prior to the introduction of this bug. Signed-off-by:
Paul Clements <paul.clements@steeleye.com> Reported-by:
Jon Nelson <jnelson-kernel-bugzilla@jamponi.net> Acked-by:
Pavel Machek <pavel@ucw.cz> Cc: <stable@kernel.org> [2.6.26.x, 2.6.27.x, 2.6.28.x] Signed-off-by:
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Jeremy Fitzhardinge authored
Christophe Saout reported [in precursor to: http://marc.info/?l=linux-kernel&m=123209902707347&w=4]: > Note that I also some a different issue with CONFIG_UNEVICTABLE_LRU. > Seems like Xen tears down current->mm early on process termination, so > that __get_user_pages in exit_mmap causes nasty messages when the > process had any mlocked pages. (in fact, it somehow manages to get into > the swapping code and produces a null pointer dereference trying to get > a swap token) Jeremy explained: Yes. In the normal case under Xen, an in-use pagetable is "pinned", meaning that it is RO to the kernel, and all updates must go via hypercall (or writes are trapped and emulated, which is much the same thing). An unpinned pagetable is not currently in use by any process, and can be directly accessed as normal RW pages. As an optimisation at process exit time, we unpin the pagetable as early as possible (switching the process to init_mm), so that all the normal pagetable teardown can happen with direct memory accesses. This happens in exit_mmap() -> arch_exit_mmap(). The munlocking happens a few lines below. The obvious thing to do would be to move arch_exit_mmap() to below the munlock code, but I think we'd want to call it even if mm->mmap is NULL, just to be on the safe side. Thus, this patch: exit_mmap() needs to unlock any locked vmas before calling arch_exit_mmap, as the latter may switch the current mm to init_mm, which would cause the former to fail. Signed-off-by:
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by:
Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Christophe Saout <christophe@saout.de> Cc: Keir Fraser <keir.fraser@eu.citrix.com> Cc: Christophe Saout <christophe@saout.de> Cc: Alex Williamson <alex.williamson@hp.com> Cc: <stable@kernel.org> [2.6.28.x] Signed-off-by:
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Jiri Slaby authored
Since netmos 9835 with subids 0x1014(IBM):0x0299 is now bound with serial/8250_pci, because it has no parallel ports and subdevice id isn't in the expected form, return -ENODEV from probe function. This is performed in netmos preinit_hook. Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Signed-off-by:
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Federico Cuello authored
Commit dcf6a79d ("write-back: fix nr_to_write counter") fixed nr_to_write counter, but didn't set the break condition properly. If nr_to_write == 0 after being decremented it will loop one more time before setting done = 1 and breaking the loop. [akpm@linux-foundation.org: coding-style fixes] Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Acked-by:
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Heiko Carstens authored
With the new system call defines we get this on uml: arch/um/sys-i386/built-in.o: In function `sys_call_table': (.rodata+0x308): undefined reference to `sys_sigprocmask' Reason for this is that uml passes the preprocessor option -Dsigprocmask=kernel_sigprocmask to gcc when compiling the kernel. This causes SYSCALL_DEFINE3(sigprocmask, ...) to be expanded to SYSCALL_DEFINEx(3, kernel_sigprocmask, ...) and finally to a system call named sys_kernel_sigprocmask. However sys_sigprocmask is missing because of this. To avoid macro expansion for the system call name just concatenate the name at first define instead of carrying it through severel levels. This was pointed out by Al Viro. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by:
WANG Cong <wangcong@zeuux.org> Signed-off-by:
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Carsten Otte authored
For a reason that I was unable to understand in three months of debugging, mount ext2 -o remount stopped working properly when remounting from regular operation to xip, or the other way around. According to a git bisect search, the problem was introduced with the VM_MIXEDMAP/PTE_SPECIAL rework in the vm: commit 70688e4d Author: Nick Piggin <npiggin@suse.de> Date: Mon Apr 28 02:13:02 2008 -0700 xip: support non-struct page backed memory In the failing scenario, the filesystem is mounted read only via root= kernel parameter on s390x. During remount (in rc.sysinit), the inodes of the bash binary and its libraries are busy and cannot be invalidated (the bash which is running rc.sysinit resides on subject filesystem). Afterwards, another bash process (running ifup-eth) recurses into a subshell, runs dup_mm (via fork). Some of the mappings in this bash process were created from inodes that could not be invalidated during remount. Both parent and child process crash some time later due to inconsistencies in their address spaces. The issue seems to be timing sensitive, various attempts to recreate it have failed. This patch refuses to change the xip flag during remount in case some inodes cannot be invalidated. This patch keeps users from running into that issue. [akpm@linux-foundation.org: cleanup] Signed-off-by:
Carsten Otte <cotte@de.ibm.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Jared Hulbert <jaredeh@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Li Zefan authored
I enabled all cgroup subsystems when compiling kernel, and then: # mount -t cgroup -o net_cls xxx /mnt # mkdir /mnt/0 This showed up immediately: BUG: MAX_LOCKDEP_SUBCLASSES too low! turning off the locking correctness validator. It's caused by the cgroup hierarchy lock: for (i = 0; i < CGROUP_SUBSYS_COUNT; i++) { struct cgroup_subsys *ss = subsys[i]; if (ss->root == root) mutex_lock_nested(&ss->hierarchy_mutex, i); } Now we have 9 cgroup subsystems, and the above 'i' for net_cls is 8, but MAX_LOCKDEP_SUBCLASSES is 8. This patch uses different lockdep keys for different subsystems. Signed-off-by:Li Zefan <lizf@cn.fujitsu.com> Acked-by:
Paul Menage <menage@google.com> Signed-off-by:
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KOSAKI Motohiro authored
Add Li Zefan as co-maintainer. Acked-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
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Roel Kluin authored
With a postfix decrement t will reach -1 rather than 0, so neither the warning nor the `goto error_out' will occur. Signed-off-by:
Roel Kluin <roel.kluin@gmail.com> Acked-by:
Manuel Lauss <mano@roarinelk.homelinux.net> Acked-by:
Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Randy Dunlap authored
Fix kernel-doc processing of SYSCALL wrappers. The SYSCALL wrapper patches played havoc with kernel-doc for syscalls. Syscalls that were scanned for DocBook processing reported warnings like this one, for sys_tgkill: Warning(kernel/signal.c:2285): No description found for parameter 'tgkill' Warning(kernel/signal.c:2285): No description found for parameter 'pid_t' Warning(kernel/signal.c:2285): No description found for parameter 'int' because the macro parameters all "look like" function parameters, although they are not: /** * sys_tgkill - send signal to one specific thread * @tgid: the thread group ID of the thread * @pid: the PID of the thread * @sig: signal to be sent * * This syscall also checks the @tgid and returns -ESRCH even if the PID * exists but it's not belonging to the target process anymore. This * method solves the problem of threads exiting and PIDs getting reused. */ SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig) { ... This patch special-cases the handling SYSCALL_DEFINE* function prototypes by expanding them to long sys_foobar(type1 arg1, type1 arg2, ...) Signed-off-by:Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Randy Dunlap authored
Fix kernel-doc-nano-HOWTO.txt to use */ as the ending marker in kernel-doc examples and state that */ is the preferred ending marker. Signed-off-by:
Robert Love <robert.w.love@intel.com> Signed-off-by:
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KAMEZAWA Hiroyuki authored
page_cgroup's page allocation at init/memory hotplug uses kmalloc() and vmalloc(). If kmalloc() failes, vmalloc() is used. This is because vmalloc() is very limited resource on 32bit systems. We want to use kmalloc() first. But in this kind of call, __GFP_NOWARN should be specified. Reported-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by:
Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by:
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Uwe Kleine-Koenig authored
Signed-off-by:
Uwe Kleine-Koenig <ukleinek@strlen.de> Signed-off-by:
Mike Frysinger <vapier.adi@gmail.com> Signed-off-by:
Bryan Wu <cooloney@kernel.org> Signed-off-by:
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Marcel Selhorst authored
Update my email address. Signed-off-by:
Marcel Selhorst <m.selhorst@sirrix.com> Signed-off-by:
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MinChan Kim authored
When I tested following program, I found that the mlocked counter is strange. It cannot free some mlocked pages. It is because try_to_unmap_file() doesn't check real page mappings in vmas. That is because the goal of an address_space for a file is to find all processes into which the file's specific interval is mapped. It is related to the file's interval, not to pages. Even if the page isn't really mapped by the vma, it returns SWAP_MLOCK since the vma has VM_LOCKED, then calls try_to_mlock_page. After this the mlocked counter is increased again. COWed anon page in a file-backed vma could be a such case. This patch resolves it. -- my test program -- int main() { mlockall(MCL_CURRENT); return 0; } -- before -- root@barrios-target-linux:~# cat /proc/meminfo | egrep 'Mlo|Unev' Unevictable: 0 kB Mlocked: 0 kB -- after -- root@barrios-target-linux:~# cat /proc/meminfo | egrep 'Mlo|Unev' Unevictable: 8 kB Mlocked: 8 kB Signed-off-by:MinChan Kim <minchan.kim@gmail.com> Acked-by:
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Jan Kara authored
This reverts commit c87591b7. Since journal_start_commit() is now fixed to return 1 when we started a transaction commit, there's some transaction waiting to be committed or there's a transaction already committing, we don't need to call ext3_force_commit() in ext3_sync_fs(). Furthermore ext3_force_commit() can unnecessarily create sync transaction which is expensive so it's worthwhile to remove it when we can. Cc: Eric Sandeen <sandeen@redhat.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by:
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Jan Kara authored
journal_start_commit() returns 1 if either a transaction is committing or the function has queued a transaction commit. But it returns 0 if we raced with somebody queueing the transaction commit as well. This resulted in ext3_sync_fs() not functioning correctly (description from Arthur Jones): In the case of a data=ordered umount with pending long symlinks which are delayed due to a long list of other I/O on the backing block device, this causes the buffer associated with the long symlinks to not be moved to the inode dirty list in the second phase of fsync_super. Then, before they can be dirtied again, kjournald exits, seeing the UMOUNT flag and the dirty pages are never written to the backing block device, causing long symlink corruption and exposing new or previously freed block data to userspace. This can be reproduced with a script created by Eric Sandeen <sandeen@redhat.com>: #!/bin/bash umount /mnt/test2 mount /dev/sdb4 /mnt/test2 rm -f /mnt/test2/* dd if=/dev/zero of=/mnt/test2/bigfile bs=1M count=512 touch /mnt/test2/thisisveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylongfilename ln -s /mnt/test2/thisisveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylongfilename /mnt/test2/link umount /mnt/test2 mount /dev/sdb4 /mnt/test2 ls /mnt/test2/ This patch fixes journal_start_commit() to always return 1 when there's a transaction committing or queued for commit. Cc: Eric Sandeen <sandeen@redhat.com> Cc: Mike Snitzer <snitzer@gmail.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: -
Sven Wegener authored
We need to pass an unsigned long as the minimum, because it gets casted to an unsigned long in the sysctl handler. If we pass an int, we'll access four more bytes on 64bit arches, resulting in a random minimum value. [rientjes@google.com: fix type of `old_bytes'] Signed-off-by:
Sven Wegener <sven.wegener@stealer.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by:
David Rientjes <rientjes@google.com> Signed-off-by:
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Andres Salomon authored
We weren't properly allocating the cmap for depths greater than 8bpp, which caused pain for things like DirectFB. Also, we never freed the cmap memory upon module unload.. Signed-off-by:
Andres Salomon <dilinger@debian.org> Cc: Marco La Porta <marco-laporta@tiscali.it> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Signed-off-by:
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Andres Salomon authored
We weren't properly allocating the cmap for depths greater than 8bpp, which caused pain for things like DirectFB. Also, we never freed the cmap memory upon module unload.. Signed-off-by:
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Marco La Porta authored
We weren't properly allocating the cmap for depths greater than 8bpp, which caused pain for things like DirectFB. Also, we never freed the cmap memory upon module unload.. [dilinger@debian.org: dropped unnecessary code and clean up patch] [dilinger@debian.org: add error checking and handling] Signed-off-by:
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Robert Jarzmik authored
Signed-off-by:
Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by:
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Daisuke Nishimura authored
migrate_vmas() should check "vma" not "vma->vm_next" for for-loop condition. Signed-off-by:
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by:
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Mel Gorman authored
Commit 5a6fe125 brought hugetlbfs more in line with the core VM by obeying VM_NORESERVE and not reserving hugepages for both shared and private mappings when [SHM|MAP]_NORESERVE are specified. However, it is still taking filesystem quota unconditionally. At fault time, if there are no reserves and attempt is made to allocate the page and account for filesystem quota. If either fail, the fault fails. The impact is that quota is getting accounted for twice. This patch partially reverts 5a6fe125. To help prevent this mistake happening again, it improves the documentation of hugetlb_reserve_pages() Reported-by:
Andy Whitcroft <apw@canonical.com> Signed-off-by:
Mel Gorman <mel@csn.ul.ie> Acked-by:
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Linus Torvalds authored
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: revert recent sync wakeup changes
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Linus Torvalds authored
Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: timers: fix TIMER_ABSTIME for process wide cpu timers timers: split process wide cpu clocks/timers, fix x86: clean up hpet timer reinit timers: split process wide cpu clocks/timers, remove spurious warning timers: split process wide cpu clocks/timers signal: re-add dead task accumulation stats. x86: fix hpet timer reinit for x86_64 sched: fix nohz load balancer on cpu offline
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Linus Torvalds authored
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: ptrace, x86: fix the usage of ptrace_fork() i8327: fix outb() parameter order x86: fix math_emu register frame access x86: math_emu info cleanup x86: include correct %gs in a.out core dump x86, vmi: put a missing paravirt_release_pmd in pgd_dtor x86: find nr_irqs_gsi with mp_ioapic_routing x86: add clflush before monitor for Intel 7400 series x86: disable intel_iommu support by default x86: don't apply __supported_pte_mask to non-present ptes x86: fix grammar in user-visible BIOS warning x86/Kconfig.cpu: make Kconfig help readable in the console x86, 64-bit: print DMI info in the oops trace
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Linus Torvalds authored
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: tracing, x86: fix constraint for parent variable tracing, x86: fix fixup section to return to original code profiling: fix broken profiling regression
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git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds authored
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: [S390] Update default configuration. [S390] dasd: fix race in dasd timer handling [S390] dasd: bus_id -> dev_name() conversion. [S390] Fix init irq proc build break. [S390] vdso: fix per cpu vdso pointer in lowcore
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpcLinus Torvalds authored
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/mm: Fix _PAGE_COHERENT support on classic ppc32 HW
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Peter Zijlstra authored
Intel reported a 10% regression (mysql+sysbench) on a 16-way machine with these patches: 1596e297: sched: symmetric sync vs avg_overlap d942fb6c: sched: fix sync wakeups Revert them. Reported-by:
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com> Bisected-by:
Lin Ming <ming.m.lin@intel.com> Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Peter Zijlstra authored
The POSIX timer interface allows for absolute time expiry values through the TIMER_ABSTIME flag, therefore we have to synchronize the timer to the clock every time we start it. Signed-off-by:
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