- 03 3月, 2010 1 次提交
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由 Martin Schwidefsky 提交于
Oprofile is currently broken on systems running with NOHZ enabled. A maximum of 1 tick is accounted via the timer_hook if a cpu sleeps for a longer period of time. This does bad things to the percentages in the profiler output. To solve this problem convert oprofile to use a restarting hrtimer instead of the timer_hook. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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- 26 2月, 2010 12 次提交
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由 Robert Richter 提交于
During switching virtual counters there is access to perfctr msrs. If the counter is not available this fails due to an invalid address. This patch fixes this. Cc: stable@kernel.org Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
Cc: stable@kernel.org Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
Multiple virtual counters share one physical counter. The reservation of virtual counters fails due to duplicate allocation of the same counter. The counters are already reserved. Thus, virtual counter reservation may removed at all. This also makes the code easier. Cc: stable@kernel.org Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Naga Chumbalkar 提交于
Currently, oprofile fails silently on platforms where a non-OS entity such as the system firmware "enables" and uses a performance counter. There is a warning in the code for this case. The warning indicates an already running counter. If oprofile doesn't collect data, then try using a different performance counter on your platform to monitor the desired event. Delete the counter from the desired event by editing the /usr/share/oprofile/<cpu_type>/<cpu>/events file. If the event cannot be monitored by any other counter, contact your hardware or BIOS vendor. Cc: Shashi Belur <shashi-kiran.belur@hp.com> Cc: Tony Jones <tonyj@suse.de> Signed-off-by: NNaga Chumbalkar <nagananda.chumbalkar@hp.com> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
This patch generates a warning if a counter is already active. Implemented for AMD and P6 models. P4 is not supported. Cc: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Cc: Shashi Belur <shashi-kiran.belur@hp.com> Cc: Tony Jones <tonyj@suse.de> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
IBS selects an op (execution operation) for sampling by counting either cycles or dispatched ops. Better statistical samples can be produced by adding a software generated random offset to the periodic op counter value with each sample. This patch adds software randomization to the IBS periodic op counter. The lower 12 bits of the 20 bit counter are randomized. IbsOpCurCnt is initialized with a 12 bit random value. There is a work around if the hw can not write to IbsOpCurCnt. Then the lower 8 bits of the 16 bit IbsOpMaxCnt [15:0] value are randomized in the range of -128 to +127 by adding/subtracting an offset to the maximum count (IbsOpMaxCnt). The linear feedback shift register (LFSR) algorithm is used for pseudo-random number generation to have low impact to the memory system. Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Suravee Suthikulpanit 提交于
This patch implements a linear feedback shift register (LFSR) for pseudo-random number generation for IBS. For IBS measurements it would be good to minimize memory traffic in the interrupt handler since every access pollutes the data caches. Computing a maximal period LFSR just needs shifts and ORs. The LFSR method is good enough to randomize the ops at low overhead. 16 pseudo-random bits are enough for the implementation and it doesn't matter that the pattern repeats with a fairly short cycle. It only needs to break up (hard) periodic sampling behavior. The logic was designed by Paul Drongowski. Signed-off-by: NSuravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
This patch adds IBS feature detection using cpuid flags. An IBS capability mask is introduced to test for certain IBS features. The bit mask is the same as for IBS cpuid feature flags (Fn8000_001B_EAX), but bit 0 is used to indicate the existence of IBS. The patch also changes the handling of the IbsOpCntCtl bit (periodic op counter count control). The oprofilefs file for this feature (ibs_op/dispatched_ops) will be only exposed if the feature is available, also the default for the bit is set to count clock cycles. In general, the userland can detect the availability of a feature by checking for the corresponding file in oprofilefs. If it exists, the feature also exists. This may lead to a dynamic file layout depending on the cpu type with that the userland has to deal with. Current opcontrol is compatible. Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
Standard AMD systems have the same number of nodes as there are northbridge devices. However, there may kernel configurations (especially for 32 bit) or system setups exist, where the node number is different or it can not be detected properly. Thus the check is not reliable and may fail though IBS setup was fine. For this reason it is better to remove the check. Cc: stable <stable@kernel.org> Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
OProfile support for IBS is now for several versions in the kernel. The feature is stable now and the code can be activated permanently. As a side effect IBS now works also on nosmp configs. Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
OProfile is already used for a long time and no longer experimental. Signed-off-by: NRobert Richter <robert.richter@amd.com>
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由 Robert Richter 提交于
The commit 1155de47 ring-buffer: Make it generally available already made ring-buffer available without the TRACING option enabled. This patch removes the TRACING dependency from oprofile. Fixes also oprofile configuration on ia64. The patch also applies to the 2.6.32-stable kernel. Reported-by: NTony Jones <tonyj@suse.de> Cc: stable@kernel.org Signed-off-by: NRobert Richter <robert.richter@amd.com>
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- 13 2月, 2010 8 次提交
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由 Linus Torvalds 提交于
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6由 Linus Torvalds 提交于
* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ALSA: hda - use WARN_ON_ONCE() for zero-division detection
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git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel: drm/i915: hold ref on flip object until it completes drm/i915: Fix crash while aborting hibernation drm/i915: Correctly return -ENOMEM on allocation failure in cmdbuf ioctls. drm/i915: fix pipe source image setting in flip command drm/i915: fix flip done interrupt on Ironlake drm/i915: untangle page flip completion drm/i915: handle FBC and self-refresh better drm/i915: Increase fb alignment to 64k drm/i915: Update write_domains on active list after flush. drm/i915: Rework DPLL calculation parameters for Ironlake
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由 Takashi Iwai 提交于
Replace the zero-division warning message with WARN_ON_ONCE() per the advice by Linus. This shouldn't happen, but if it happens, it's possible that the bug happens often due to buggy IRQs. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Kyle McMartin 提交于
Mike Frysinger pointed out that calling tracehook_signal_handler with stepping=0 missed testing the thread flags, resulting in not calling ptrace_notify. Fix this by testing if we're single stepping or branch stepping and setting the flag accordingly. Tested, seems to work. Reported-by: NMike Frysinger <vapier@gentoo.org> Signed-off-by: NKyle McMartin <kyle@mcmartin.ca> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6由 Linus Torvalds 提交于
* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ALSA: hda-intel: Avoid divide by zero crash
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git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: regulator/lp3971: vol_map out of bounds in lp3971_{ldo,dcdc}_set_voltage() regulator: Fix display of null constraints for regulators
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git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes: GFS2: Fix bmap allocation corner-case bug GFS2: Fix error code
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- 12 2月, 2010 19 次提交
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由 Roel Kluin 提交于
After `for (val = LDO_VOL_MIN_IDX; val <= LDO_VOL_MAX_IDX; val++)', if no break occurs, val reaches LDO_VOL_MIN_IDX + 1, which is out of bounds for ldo45_voltage_map[] and ldo123_voltage_map[]. Similarly BUCK_TARGET_VOL_MAX_IDX + 1 is out of bounds for buck_voltage_map[]. Signed-off-by: NRoel Kluin <roel.kluin@gmail.com> Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: NLiam Girdwood <lrg@slimlogic.co.uk>
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由 Mark Brown 提交于
If the regulator constraints are empty and there is no voltage reported then nothing will be added to the text displayed for the constraints, leading to random stack data being printed. This is unlikely to happen for practical regulators since most will at least report a voltage but should still be fixed. Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@kernel.org Signed-off-by: NLiam Girdwood <lrg@slimlogic.co.uk>
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由 Steven Whitehouse 提交于
This patch solves a corner case during allocation which occurs if both metadata (indirect) and data blocks are required but there is an obstacle in the filesystem (e.g. a resource group header or another allocated block) such that when the allocation is requested only enough blocks for the metadata are returned. By changing the exit condition of this loop, we ensure that a minimum of one data block will always be returned. Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
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由 Abhijith Das 提交于
We need this one-liner to signal the mount helper of the 'insufficient journals' condition. Signed-off-by: NAbhijith Das <adas@redhat.com> Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
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由 Linus Torvalds 提交于
Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 * 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: OMAP: hsmmc: fix memory leak
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git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: amd64_edac: Do not falsely trigger kerneloops
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git://git.kernel.dk/linux-2.6-block由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: cciss: Make cciss_seq_show handle holes in the h->drv[] array cfq-iosched: split seeky coop queues after one slice
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git://git.linux-nfs.org/projects/trondmy/nfs-2.6由 Linus Torvalds 提交于
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: NFS: Fix the mapping of the NFSERR_SERVERFAULT error NFS: Remove a redundant check for PageFsCache in nfs_migrate_page() NFS: Fix a bug in nfs_fscache_release_page()
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git://git.infradead.org/users/cbou/battery-2.6.33由 Linus Torvalds 提交于
* git://git.infradead.org/users/cbou/battery-2.6.33: wm97xx_battery: Handle missing platform data gracefully
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: [SCSI] qla2xxx: Obtain proper host structure during response-queue processing. [SCSI] compat_ioct: fix bsg SG_IO [SCSI] qla2xxx: make msix interrupt handler safe for irq [SCSI] zfcp: Report FC BSG errors in correct field [SCSI] mptfusion : mptscsih_abort return value should be SUCCESS instead of value 0.
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: psmouse - make sure we don't schedule reconnects after cleanup
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6由 Linus Torvalds 提交于
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (30 commits) vgaarb: fix incorrect dereference of userspace pointer. drm/radeon/kms: retry auxch on 0x20 timeout value. drm/radeon: Skip dma copy test in benchmark if card doesn't have dma engine. drm/vmwgfx: Fix a circular locking dependency bug. drm/vmwgfx: Drop scanout flag compat and add execbuf ioctl parameter members. Bumps major. drm/vmwgfx: Report propper framebuffer_{max|min}_{width|height} drm/vmwgfx: Update the user-space interface. drm/radeon/kms: fix screen clearing before fbcon. nouveau: fix state detection with switchable graphics drm/nouveau: move dereferences after null checks drm/nv50: make the pgraph irq handler loop like the pre-nv50 version drm/nv50: delete ramfc object after disabling fifo, not before drm/nv50: avoid unloading pgraph context when ctxprog is running drm/nv50: align size of buffer object to the right boundaries. drm/nv50: disregard dac outputs in nv50_sor_dpms() drm/nv50: prevent multiple init tables being parsed at the same time drm/nouveau: make dp auxch xfer len check for reads only drm/nv40: make INIT_COMPUTE_MEM a NOP, just like nv50 drm/nouveau: Add proper vgaarb support. drm/nouveau: Fix fbcon on mixed pre-NV50 + NV50 multicard. ...
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git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx由 Linus Torvalds 提交于
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: drivers/dma: Correct NULL test async-tx: fix buffer submission error handling in ipu_idma.c dmaengine: correct onstack wait_queue_head declaration ioat: fix infinite timeout checking in ioat2_quiesce dmaengine: fix memleak in dma_async_device_unregister
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git://ftp.linux-mips.org/pub/scm/upstream-linus由 Linus Torvalds 提交于
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: Don't probe reserved EntryHi bits. MIPS: SNI: Correct NULL test MIPS: Fix __devinit __cpuinit confusion in cpu_cache_init MIPS: IP27: Make defconfig useful again. MIPS: Fixup of the r4k timer
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git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: RDMA/cm: Revert association of an RDMA device when binding to loopback
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由 Linus Torvalds 提交于
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: x86, apic: Don't use logical-flat mode when CPU hotplug may exceed 8 CPUs x86-32: Make AT_VECTOR_SIZE_ARCH=2 x86/agp: Fix amd64-agp module initialization regression x86, doc: Fix minor spelling error in arch/x86/mm/gup.c
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc32: Fix thinko in previous change. sparc: Align clone and signal stacks to 16 bytes.
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由 Michael Neuling 提交于
When reserving stack space for a new process, make sure we're not attempting to expand the stack by more than rlimit allows. This fixes a bug caused by b6a2fea3 ("mm: variable length argument support") and unmasked by fc63cf23 ("exec: setup_arg_pages() fails to return errors"). This bug means that when limiting the stack to less the 20*PAGE_SIZE (eg. 80K on 4K pages or 'ulimit -s 79') all processes will be killed before they start. This is particularly bad with 64K pages, where a ulimit below 1280K will kill every process. To test, do: 'ulimit -s 15; ls' before and after the patch is applied. Before it's applied, 'ls' should be killed. After the patch is applied, 'ls' should no longer be killed. A stack limit of 15KB since it's small enough to trigger 20*PAGE_SIZE. Also 15KB not a multiple of PAGE_SIZE, which is a trickier case to handle correctly with this code. 4K pages should be fine to test with. [kosaki.motohiro@jp.fujitsu.com: cleanup] [akpm@linux-foundation.org: cleanup cleanup] Signed-off-by: NMichael Neuling <mikey@neuling.org> Signed-off-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Americo Wang <xiyou.wangcong@gmail.com> Cc: Anton Blanchard <anton@samba.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: James Morris <jmorris@namei.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: <stable@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Andreas Schwab 提交于
This is used by tcgetsid(3). Signed-off-by: NAndreas Schwab <schwab@linux-m68k.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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