- 01 Aug, 2010 4 commits
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Frederic Weisbecker authored
Migrate out events may happen on tasks that are not in the runqueue, for example this is the case for tasks that are sleeping. In this case, we don't want to log the migrate out event in the source runqueue because the task is not eventually in the runqueue and we have already logged its sleep event. This fixes timeslices that spuriously propagate a sleep event from the previous timeslice. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Nikhil Rao <ncrao@google.com> Cc: Tom Zanussi <tzanussi@gmail.com>
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Frederic Weisbecker authored
This brings a GUI tool that displays an overview of the load of tasks proportion in each CPUs. The CPUs forward progress is cut in timeslices. A new timeslice is created for every runqueue event: a task gets pushed out or pulled in the runqueue. For each timeslice, every CPUs rectangle is colored with a red power that describes the local load against the total load. This more red is the rectangle, the higher is the given CPU load. This load is the number of tasks running on the CPU, without any distinction against the scheduler policy of the tasks, for now. Also for each timeslice, the event origin is depicted on the CPUs that triggered it using a thin colored line on top of the rectangle timeslice. These events are: * sleep: a task went to sleep and has then been pulled out the runqueue. The origin color in the thin line is dark blue. * wake up: a task woke up and has then been pushed in the runqueue. The origin color is yellow. * wake up new: a new task woke up and has then been pushed in the runqueue. The origin color is green. * migrate in: a task migrated in the runqueue due to a load balancing operation. The origin color is violet. * migrate out: reverse of the previous one. Migrate in events usually have paired migrate out events in another runqueue. The origin color is light blue. Clicking on a timeslice provides the runqueue event details and the runqueue state. The CPU rectangles can be navigated using the usual arrow controls. Horizontal zooming in/out is possible with the "+" and "-" buttons. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Venkatesh Pallipadi <venki@google.com> Cc: Pierre Tardy <tardyp@gmail.com> Cc: Nikhil Rao <ncrao@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com>
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Frederic Weisbecker authored
Drop the cpparg() macro that wraps CPP parameters. We already have the PARAM() macro for that, no need to have several versions. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com>
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Frederic Weisbecker authored
We use synchronize_sched() to ensure a tracepoint won't be called while/after we release the perf buffers it references. But the tracepoint API has its own API for that: tracepoint_synchronize_unregister(). Use it instead as it's self-explanatory and eases maintainance. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com>
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- 23 Jul, 2010 1 commit
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Ingo Molnar authored
Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
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- 22 Jul, 2010 3 commits
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Dan Carpenter authored
We need to add one to the strlen() return because of the NULL character. The type->name here generally comes from the kernel and I don't think any of them come close to being MAX_TRACER_SIZE (100) characters long so this is basically a cleanup. Signed-off-by: Dan Carpenter <error27@gmail.com> LKML-Reference: <20100710100644.GV19184@bicker> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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David Daney authored
I found this issue in a locally patched 2.6.32.x, current kernels have moved the offending code to an __init function which is skipped by recordmcount.pl, so the bug is not currently being exercised. However, I think the patch is still a good idea, to avoid future problems if _mcount were to ever have its address taken in normal code. This is what I originally saw: Although arch/mips/kernel/ftrace.c is built without -pg, and thus contains no calls to _mcount, it does use the address of _mcount in ftrace_make_nop(). This was causing relocations to be emitted for _mcount which recordmcount.pl erronously took to be _mcount call sites. The result was that the text of ftrace_make_nop() would be patched with garbage leading to a system crash. In non-module code, all _mcount call sites will have R_MIPS_26 relocations, so we restrict $mcount_regex to only match on these. Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> LKML-Reference: <1278712325-12050-1-git-send-email-ddaney@caviumnetworks.com> Cc: Li Hong <lihong.hi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matt Fleming <matt@console-pimps.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Thomas Renninger authored
and fix the broken case if a core's frequency depends on others. trace_power_frequency was only implemented in a rather ungeneric way in acpi-cpufreq driver's target() function only. -> Move the call to trace_power_frequency to cpufreq.c:cpufreq_notify_transition() where CPUFREQ_POSTCHANGE notifier is triggered. This will support power frequency tracing by all cpufreq drivers. trace_power_frequency did not trace frequency changes correctly when the userspace governor was used or when CPU cores' frequency depend on each other. -> Moving this into the CPUFREQ_POSTCHANGE notifier and pass the cpu which gets switched automatically fixes this. Robert Schoene provided some important fixes on top of my initial quick shot version which are integrated in this patch: - Forgot some changes in power_end trace (TP_printk/variable names) - Variable dummy in power_end must now be cpu_id - Use static 64 bit variable instead of unsigned int for cpu_id [akpm@linux-foundation.org: build fix] Signed-off-by: Thomas Renninger <trenn@suse.de> Cc: davej@codemonkey.org.uk Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Dave Jones <davej@codemonkey.org.uk> Acked-by: Arjan van de Ven <arjan@infradead.org> Cc: Robert Schoene <robert.schoene@tu-dresden.de> Tested-by: Robert Schoene <robert.schoene@tu-dresden.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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- 21 Jul, 2010 17 commits
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Ingo Molnar authored
Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
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Ingo Molnar authored
Merge reason: Pick up the latest perf fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6Linus Torvalds authored
* 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6: pcmcia: fix 'driver ... did not release config properly' warning
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git://git.kernel.org/pub/scm/linux/kernel/git/dgc/xfsdevLinus Torvalds authored
* 'shrinker' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/xfsdev: mm: add context argument to shrinker callback to remaining shrinkers
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6Linus Torvalds authored
* 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ASoC: Select wm_hubs automatically for WM8994 ASoC: Remove duplicate AUX definition from WM8776 ASoC:: remove a redundant snd_soc_unregister_codec call in wm8988_register ASoC: wm8727: add a missing return in wm8727_platform_probe ASoC: fsi: fixup wrong value setting order of TDM ASoC: fsi: fixup clock inversion operation
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: math-emu: correct test for downshifting fraction in _FP_FROM_INT() perf: Add DWARF register lookup for sparc MAINTAINERS: Add SBUS driver path to sparc entry. drivers/sbus: Remove unnecessary casts of private_data sparc: remove homegrown L1_CACHE_ALIGN macro sparc64: fix the build error due to smp_kgdb_capture_client() sparc64: Fix maybe_change_configuration() PCR setting. arch/sparc/kernel: Eliminate what looks like a NULL pointer dereference sparc64: Update defconfig. sunsu: Fix use after free in su_remove(). sunserial: Don't call add_preferred_console() when console= is specified. sparc32: Kill none_mask, it's bogus.
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Linus Torvalds authored
Pointed out by Lucas who found the new one in a comment in setup_percpu.c. And then I fixed the others that I grepped for. Reported-by: Lucas <canolucas@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Mike Frysinger authored
Add more details to the dynamic function tracing design implementation. Signed-off-by: Mike Frysinger <vapier@gentoo.org> LKML-Reference: <1279610015-10250-1-git-send-email-vapier@gentoo.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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KOSAKI Motohiro authored
Documentation/trace/ftrace.txt says buffer_size_kb: This sets or displays the number of kilobytes each CPU buffer can hold. The tracer buffers are the same size for each CPU. The displayed number is the size of the CPU buffer and not total size of all buffers. The trace buffers are allocated in pages (blocks of memory that the kernel uses for allocation, usually 4 KB in size). If the last page allocated has room for more bytes than requested, the rest of the page will be used, making the actual allocation bigger than requested. ( Note, the size may not be a multiple of the page size due to buffer management overhead. ) This can only be updated when the current_tracer is set to "nop". But it's incorrect. currently total memory consumption is 'buffer_size_kb x CPUs x 2'. Why two times difference is there? because ftrace implicitly allocate the buffer for max latency too. That makes sad result when admin want to use large buffer. (If admin want full logging and makes detail analysis). example, If admin have 24 CPUs machine and write 200MB to buffer_size_kb, the system consume ~10GB memory (200MB x 24 x 2). umm.. 5GB memory waste is usually unacceptable. Fortunatelly, almost all users don't use max latency feature. The max latency buffer can be disabled easily. This patch shrink buffer size of the max latency buffer if unnecessary. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> LKML-Reference: <20100701104554.DA2D.A69D9226@jp.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Patrick McHardy authored
Up to 2.6.34 pcmcia_release_irq() reset p_dev->_irq to 0 after releasing the irq. The IRQ is now released in pcmcia_disable_device(), however p_dev->_irq is not reset, triggering a warning in pcmcia_device_remove(). Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
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Dave Chinner authored
Add the shrinkers missed in the first conversion of the API in commit 7f8275d0 ("mm: add context argument to shrinker callback"). Signed-off-by: Dave Chinner <dchinner@redhat.com>
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Lai Jiangshan authored
__print_flags() and __print_symbolic() use percpu trace_seq: 1) Its memory is allocated at compile time, it wastes memory if we don't use tracing. 2) It is percpu data and it wastes more memory for multi-cpus system. 3) It disables preemption when it executes its core routine "trace_seq_printf(s, "%s: ", #call);" and introduces latency. So we move this trace_seq to struct trace_iterator. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <4C078350.7090106@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Richard Kennedy authored
Reorder structure to remove 8 bytes of padding on 64 bit builds. This shrinks the size to 128 bytes so allowing allocation from a smaller slab & needed one fewer cache lines. Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> LKML-Reference: <1269516456.2054.8.camel@localhost> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Li Zefan authored
We found that even enabling a single trace event that will rarely be triggered can add big overhead to context switch. (lmbench context switch test) ------------------------------------------------- 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/64K ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ------ ------ ------ ------ ------ ------- ------- 2.19 2.3 2.21 2.56 2.13 2.54 2.07 2.39 2.51 2.35 2.75 2.27 2.81 2.24 The overhead is 6% ~ 11%. It's because when a trace event is enabled 3 tracepoints (sched_switch, sched_wakeup, sched_wakeup_new) will be activated to map pid to cmdname. We'd like to avoid this overhead, so add a trace option '(no)record-cmd' to allow to disable cmdline recording. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4C2D57F4.2050204@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Mikael Pettersson authored
The kernel's math-emu code contains a macro _FP_FROM_INT() which is used to convert an integer to a raw normalized floating-point value. It does this basically in three steps: 1. Compute the exponent from the number of leading zero bits. 2. Downshift large fractions to put the MSB in the right position for normalized fractions. 3. Upshift small fractions to put the MSB in the right position. There is an boundary error in step 2, causing a fraction with its MSB exactly one bit above the normalized MSB position to not be downshifted. This results in a non-normalized raw float, which when packed becomes a massively inaccurate representation for that input. The impact of this depends on a number of arch-specific factors, but it is known to have broken emulation of FXTOD instructions on UltraSPARC III, which was originally reported as GCC bug 44631 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44631>. Any arch which uses math-emu to emulate conversions from integers to same-size floats may be affected. The fix is simple: the exponent comparison used to determine if the fraction should be downshifted must be "<=" not "<". I'm sending a kernel module to test this as a reply to this message. There are also SPARC user-space test cases in the GCC bug entry. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6Linus Torvalds authored
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm/r600: fix possible NULL pointer derefernce drm/radeon/kms: add quirk for ASUS HD 3600 board include/linux/vgaarb.h: add missing part of include guard drm/nouveau: Fix crashes during fbcon init on single head cards. drm/nouveau: fix pcirom vbios shadow breakage from acpi rom patch drm/radeon/kms: fix shared ddc harder drm/i915: enable low power render writes on GEN3 hardware. drm/i915: Define MI_ARB_STATE bits vmwgfx: return -EFAULT if copy_to_user fails fb: handle allocation failure in alloc_apertures() drm: radeon: check kzalloc() result drm/ttm: Fix build on architectures without AGP drm/radeon/kms: fix gtt MC base alignment on rs4xx/rs690/rs740 asics drm/radeon/kms: fix possible mis-detection of sideport on rs690/rs740 drm/radeon/kms: fix legacy tv-out pal mode
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Alex Deucher authored
Reported-by: Alexander Y. Fomichev <git.user@gmail.com> Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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- 20 Jul, 2010 15 commits
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Alex Deucher authored
Connector is actually DVI rather than HDMI. Reported-by: trapDoor <trapdoor6@gmail.com> Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
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Doug Goldstein authored
vgaarb.h was missing the #define of the #ifndef at the top for the guard to prevent multiple #include's from causing re-define errors Signed-off-by: Doug Goldstein <cardoe@gentoo.org> Cc: Dave Airlie <airlied@redhat.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-clientLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: ceph: do not include cap/dentry releases in replayed messages ceph: reuse request message when replaying against recovering mds ceph: fix creation of ipv6 sockets ceph: fix parsing of ipv6 addresses ceph: fix printing of ipv6 addrs ceph: add kfree() to error path ceph: fix leak of mon authorizer ceph: fix message revocation
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git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docsLinus Torvalds authored
* 'linuxdocs' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs: documentation: fix almost duplicate filenames (IO/io-mapping.txt)
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (24 commits) bridge: Partially disable netpoll support tcp: fix crash in tcp_xmit_retransmit_queue IPv6: fix CoA check in RH2 input handler (mip6_rthdr_input()) ibmveth: lost IRQ while closing/opening device leads to service loss rt2x00: Fix lockdep warning in rt2x00lib_probe_dev() vhost: avoid pr_err on condition guest can trigger ipmr: Don't leak memory if fib lookup fails. vhost-net: avoid flush under lock net: fix problem in reading sock TX queue net/core: neighbour update Oops net: skb_tx_hash() fix relative to skb_orphan_try() rfs: call sock_rps_record_flow() in tcp_splice_read() xfrm: do not assume that template resolving always returns xfrms hostap_pci: set dev->base_addr during probe axnet_cs: use spin_lock_irqsave in ax_interrupt dsa: Fix Kconfig dependencies. act_nat: not all of the ICMP packets need an IP header payload r8169: incorrect identifier for a 8168dp Phonet: fix skb leak in pipe endpoint accept() Bluetooth: Update sec_level/auth_type for already existing connections ...
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Paul E. McKenney authored
If a single-threaded process does a file-descriptor operation, and some other process accesses that same file descriptor via /proc, the current rcu_dereference_check_fdtable() can give a false-positive RCU-lockdep splat due to the reference count being increased by the /proc access after the reference-count check in fget_light() but before the check in rcu_dereference_check_fdtable(). This commit prevents this false positive by checking for a single-threaded process. To avoid #include hell, this commit uses the wrapper for thread_group_empty(current) defined by rcu_my_thread_group_empty() provided in a separate commit. Located-by: Miles Lane <miles.lane@gmail.com> Located-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Marek Szyprowski authored
System will crash sooner or later once the memory with the code of the s3c-sdhci.ko module is reused for something else. I really have no idea how the lack of remove function went unnoticed into the mainline code. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Andres Salomon authored
My Collabora address is no longer enabled - update the MODULE_AUTHOR fields of drivers to my current email address. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Yinghai Lu authored
Borislav Petkov reported his 32bit numa system has problem: [ 0.000000] Reserving total of 4c00 pages for numa KVA remap [ 0.000000] kva_start_pfn ~ 32800 max_low_pfn ~ 375fe [ 0.000000] max_pfn = 238000 [ 0.000000] 8202MB HIGHMEM available. [ 0.000000] 885MB LOWMEM available. [ 0.000000] mapped low ram: 0 - 375fe000 [ 0.000000] low ram: 0 - 375fe000 [ 0.000000] alloc (nid=8 100000 - 7ee00000) (1000000 - ffffffff) 1000 1000 => 34e7000 [ 0.000000] alloc (nid=8 100000 - 7ee00000) (1000000 - ffffffff) 200 40 => 34c9d80 [ 0.000000] alloc (nid=0 100000 - 7ee00000) (1000000 - ffffffffffffffff) 180 40 => 34e6140 [ 0.000000] alloc (nid=1 80000000 - c7e60000) (1000000 - ffffffffffffffff) 240 40 => 80000000 [ 0.000000] BUG: unable to handle kernel paging request at 40000000 [ 0.000000] IP: [<c2c8cff1>] __alloc_memory_core_early+0x147/0x1d6 [ 0.000000] *pdpt = 0000000000000000 *pde = f000ff53f000ff00 ... [ 0.000000] Call Trace: [ 0.000000] [<c2c8b4f8>] ? __alloc_bootmem_node+0x216/0x22f [ 0.000000] [<c2c90c9b>] ? sparse_early_usemaps_alloc_node+0x5a/0x10b [ 0.000000] [<c2c9149e>] ? sparse_init+0x1dc/0x499 [ 0.000000] [<c2c79118>] ? paging_init+0x168/0x1df [ 0.000000] [<c2c780ff>] ? native_pagetable_setup_start+0xef/0x1bb looks like it allocates too much high address for bootmem. Try to cut limit with get_max_mapped() Reported-by: Borislav Petkov <borislav.petkov@amd.com> Tested-by: Conny Seidel <conny.seidel@amd.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: <stable@kernel.org> [2.6.34.x] Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Yinghai Lu authored
Commit e534c7c5 ("numa: x86_64: use generic percpu var numa_node_id() implementation") broke numa systems that don't have ram on node0 when MEMORY_HOTPLUG is enabled, because cpu_up() will call cpu_to_node() before per_cpu(numa_node) is setup for APs. When Node0 doesn't have RAM, on x86, cpus already round it to nearest node with RAM in x86_cpu_to_node_map. and per_cpu(numa_node) is not set up until in c_init for APs. When later cpu_up() calling cpu_to_node() will get 0 again, and make it online even there is no RAM on node0. so later all APs can not booted up, and later will have panic. [ 1.611101] On node 0 totalpages: 0 ......... [ 2.608558] On node 0 totalpages: 0 [ 2.612065] Brought up 1 CPUs [ 2.615199] Total of 1 processors activated (3990.31 BogoMIPS). ... 93.225341] calling loop_init+0x0/0x1a4 @ 1 [ 93.229314] PERCPU: allocation failed, size=80 align=8, failed to populate [ 93.246539] Pid: 1, comm: swapper Tainted: G W 2.6.35-rc4-tip-yh-04371-gd64e6c4-dirty #354 [ 93.264621] Call Trace: [ 93.266533] [<ffffffff81125e43>] pcpu_alloc+0x83a/0x8e7 [ 93.270710] [<ffffffff81125f15>] __alloc_percpu+0x10/0x12 [ 93.285849] [<ffffffff8140786c>] alloc_disk_node+0x94/0x16d [ 93.291811] [<ffffffff81407956>] alloc_disk+0x11/0x13 [ 93.306157] [<ffffffff81503e51>] loop_alloc+0xa7/0x180 [ 93.310538] [<ffffffff8277ef48>] loop_init+0x9b/0x1a4 [ 93.324909] [<ffffffff8277eead>] ? loop_init+0x0/0x1a4 [ 93.329650] [<ffffffff810001f2>] do_one_initcall+0x57/0x136 [ 93.345197] [<ffffffff827486d0>] kernel_init+0x184/0x20e [ 93.348146] [<ffffffff81034954>] kernel_thread_helper+0x4/0x10 [ 93.365194] [<ffffffff81c7cc3c>] ? restore_args+0x0/0x30 [ 93.369305] [<ffffffff8274854c>] ? kernel_init+0x0/0x20e [ 93.386011] [<ffffffff81034950>] ? kernel_thread_helper+0x0/0x10 [ 93.392047] loop: out of memory ... Try to assign per_cpu(numa_node) early [akpm@linux-foundation.org: tidy up code comment] Signed-off-by: Yinghai <yinghai@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Tejun Heo <tj@kernel.org> Cc: Denys Vlasenko <vda.linux@googlemail.com> Acked-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Anton Vorontsov authored
Simply add a proper ID into the device table. Signed-off-by: Anton Vorontsov <avorontsov@mvista.com> Cc: Doug Thompson <dougthompson@xmission.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Dave Jiang <djiang@mvista.com> Cc: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Anton Vorontsov authored
Since commit 5753c082 ("powerpc/85xx: Kconfig cleanup"), there is no MPC85xx Kconfig symbol anymore, so the driver became non-selectable. This patch fixes the issue by switching to PPC_85xx symbol. Signed-off-by: Anton Vorontsov <avorontsov@mvista.com> Cc: Doug Thompson <dougthompson@xmission.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Dave Jiang <djiang@mvista.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Nick Piggin authored
We need lock_page_nosync() here because we have no reference to the mapping when taking the page lock. Signed-off-by: Nick Piggin <npiggin@suse.de> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Manfred Spraul authored
The last change to improve the scalability moved the actual wake-up out of the section that is protected by spin_lock(sma->sem_perm.lock). This means that IN_WAKEUP can be in queue.status even when the spinlock is acquired by the current task. Thus the same loop that is performed when queue.status is read without the spinlock acquired must be performed when the spinlock is acquired. Thanks to kamezawa.hiroyu@jp.fujitsu.com for noticing lack of the memory barrier. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16255 [akpm@linux-foundation.org: clean up kerneldoc, checkpatch warning and whitespace] Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Reported-by: Luca Tettamanti <kronos.it@gmail.com> Tested-by: Luca Tettamanti <kronos.it@gmail.com> Reported-by: Christoph Lameter <cl@linux-foundation.org> Cc: Maciej Rutecki <maciej.rutecki@gmail.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>
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Francisco Jerez authored
this fixes a regression since the fbcon rework. Signed-off-by: Francisco Jerez <currojerez@riseup.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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