- 02 3月, 2011 5 次提交
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由 Jiri Slaby 提交于
cpufreq_register_driver sets cpufreq_driver to a structure owned (and placed) in the caller's memory. If cpufreq policy fails in its ->init function, sysdev_driver_register returns nonzero in cpufreq_register_driver. Now, cpufreq_register_driver returns an error without setting cpufreq_driver back to NULL. Usually cpufreq policy modules are unloaded because they propagate the error to the module init function and return that. So a later access to any member of cpufreq_driver causes bugs like: BUG: unable to handle kernel paging request at ffffffffa00270a0 IP: [<ffffffff8145eca3>] cpufreq_cpu_get+0x53/0xe0 PGD 1805067 PUD 1809063 PMD 1c3f90067 PTE 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/virtual/net/tun0/statistics/collisions CPU 0 Modules linked in: ... Pid: 5677, comm: thunderbird-bin Tainted: G W 2.6.38-rc4-mm1_64+ #1389 To be filled by O.E.M./To Be Filled By O.E.M. RIP: 0010:[<ffffffff8145eca3>] [<ffffffff8145eca3>] cpufreq_cpu_get+0x53/0xe0 RSP: 0018:ffff8801aec37d98 EFLAGS: 00010086 RAX: 0000000000000202 RBX: 0000000000000000 RCX: 0000000000000001 RDX: ffffffffa00270a0 RSI: 0000000000001000 RDI: ffffffff8199ece8 ... Call Trace: [<ffffffff8145f490>] cpufreq_quick_get+0x10/0x30 [<ffffffff8103f12b>] show_cpuinfo+0x2ab/0x300 [<ffffffff81136292>] seq_read+0xf2/0x3f0 [<ffffffff8126c5d3>] ? __strncpy_from_user+0x33/0x60 [<ffffffff8116850d>] proc_reg_read+0x6d/0xa0 [<ffffffff81116e53>] vfs_read+0xc3/0x180 [<ffffffff81116f5c>] sys_read+0x4c/0x90 [<ffffffff81030dbb>] system_call_fastpath+0x16/0x1b ... It's all cause by weird fail path handling in cpufreq_register_driver. To fix that, shuffle the code to do proper handling with gotos. Signed-off-by: NJiri Slaby <jslaby@suse.cz> Signed-off-by: NDave Jones <davej@redhat.com>
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由 Dave Jones 提交于
Do the notifier registration later, so we don't have to worry about freeing it if we fail the msr allocation. Signed-off-by: NDave Jones <davej@redhat.com>
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由 Neil Brown 提交于
It appears that when powernow-k8 finds that No compatible ACPI _PSS objects found. and suggests Try again with latest BIOS. it fails the module load, but does not unregister the cpu_notifier that was registered in powernowk8_init This ends up leaving freed memory on the cpu notifier list for some other poor module (e.g. md/raid5) to come along and trip over. The following might be a partial fix, but I suspect there is probably other clean-up that is needed. ( https://bugzilla.novell.com/show_bug.cgi?id=655215 has full dmesg traces). Signed-off-by: NDave Jones <davej@redhat.com> Signed-off-by: NNeil Brown <neilb@suse.de>
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由 Linus Torvalds 提交于
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由 Linus Torvalds 提交于
This reverts commit c4ff4b82. Ted Ts'o reports: "TPM is working for me so I can log into employer's network in 2.6.37. It broke when I tried 2.6.38-rc6, with the following relevant lines from my dmesg: [ 11.081627] tpm_tis 00:0b: 1.2 TPM (device-id 0x0, rev-id 78) [ 25.734114] tpm_tis 00:0b: Operation Timed out [ 78.040949] tpm_tis 00:0b: Operation Timed out This caused me to get suspicious, especially since the _other_ TPM commit in 2.6.38 had already been reverted, so I tried reverting commit c4ff4b82: "TPM: Long default timeout fix". With this commit reverted, my TPM on my Lenovo T410 is once again working." Requested-and-tested-by: NTheodore Ts'o <tytso@mit.edu> Acked-by: NRajiv Andrade <srajiv@linux.vnet.ibm.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 01 3月, 2011 10 次提交
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging由 Linus Torvalds 提交于
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging: hwmon: (adt7411) add MODULE_DEVICE_TABLE hwmon: (ad7414) add MODULE_DEVICE_TABLE
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由 Randy Dunlap 提交于
Fix new kernel-doc warning in fs/block_dev.c: Warning(fs/block_dev.c:937): No description found for parameter 'kill_dirty' Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rafael J. Wysocki 提交于
Several ACPI drivers fail to build if CONFIG_NET is unset, because they refer to things depending on CONFIG_THERMAL that in turn depends on CONFIG_NET. However, CONFIG_THERMAL doesn't really need to depend on CONFIG_NET, because the only part of it requiring CONFIG_NET is the netlink interface in thermal_sys.c. Put the netlink interface in thermal_sys.c under #ifdef CONFIG_NET and remove the dependency of CONFIG_THERMAL on CONFIG_NET from drivers/thermal/Kconfig. Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl> Acked-by: NRandy Dunlap <randy.dunlap@oracle.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Len Brown <lenb@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Luming Yu <luming.yu@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6由 Linus Torvalds 提交于
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm: fix unsigned vs signed comparison issue in modeset ctl ioctl. drm/nv50-nvc0: make sure vma is definitely unmapped when destroying bo
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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: omap4: prcm: Fix the CPUx clockdomain offsets OMAP2+: clocksource: fix crash on boot when !CONFIG_OMAP_32K_TIMER OMAP2/3: clock: fix fint calculation for DPLL_FREQSEL OMAP2+: mailbox: fix lookups for multiple mailboxes OMAP2420: mailbox: fix IVA vs DSP IRQ numbering mach-omap2: smartreflex: world-writable debugfs voltage files mach-omap2: pm: world-writable debugfs timer files mach-omap2: mux: world-writable debugfs files
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由 Linus Torvalds 提交于
Merge branches 'perf-fixes-for-linus', 'x86-fixes-for-linus' and 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf timechart: Fix max number of cpus perf timechart: Fix black idle boxes in the title perf hists: Print number of samples, not the period sum * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Use u32 instead of long to set reset vector back to 0 * 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: clockevents: Prevent oneshot mode when broadcast device is periodic
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: fix truncate after open fuse: fix hang of single threaded fuseblk filesystem
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git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2由 Linus Torvalds 提交于
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: ocfs2: Check heartbeat mode for kernel stacks only Ocfs2/refcounttree: Fix a bug for refcounttree to writeback clusters in a right number. ocfs2: Fix estimate of necessary credits for mkdir
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: eukrea-tlv320: fix platform_name ASoC: correct pxa AC97 DAI names ALSA: hda - Add support for new IDT 92HD98 and 92HD99 codecs ALSA: HDA: Add ideapad quirk for two Dell machines ALSA: HDA: Add a new Conexant codec 506e (20590) ALSA: usb-audio: fix oops due to cleanup race when disconnecting ASoC: Hook wm_hubs micbiases up to CLK_SYS ASoC: Correct definition of WM8903_VMID_RES_5K ASoC: Fix WM8958 default microphone detection argument ordering ALSA: HDA: Fix mic initialization in VIA auto parser ALSA: fix one memory leak in sound jack
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由 Ben Hutchings 提交于
Commit e2cda322 ("thp: add pmd mangling generic functions") replaced some macros in <asm-generic/pgtable.h> with inline functions. If the functions are to be defined (not all architectures need them) then struct vm_area_struct must be defined first. So include <linux/mm_types.h>. Fixes a build failure seen in Debian: CC [M] drivers/media/dvb/mantis/mantis_pci.o In file included from arch/arm/include/asm/pgtable.h:460, from drivers/media/dvb/mantis/mantis_pci.c:25: include/asm-generic/pgtable.h: In function 'ptep_test_and_clear_young': include/asm-generic/pgtable.h:29: error: dereferencing pointer to incomplete type Signed-off-by: NBen Hutchings <ben@decadent.org.uk> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 28 2月, 2011 6 次提交
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由 Don Zickus 提交于
A customer of ours, complained that when setting the reset vector back to 0, it trashed other data and hung their box. They noticed when only 4 bytes were set to 0 instead of 8, everything worked correctly. Mathew pointed out: | | We're supposed to be resetting trampoline_phys_low and | trampoline_phys_high here, which are two 16-bit values. | Writing 64 bits is definitely going to overwrite space | that we're not supposed to be touching. | So limit the area modified to u32. Signed-off-by: NDon Zickus <dzickus@redhat.com> Acked-by: NMatthew Garrett <mjg@redhat.com> Cc: <stable@kernel.org> LKML-Reference: <1297139100-424-1-git-send-email-dzickus@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Renninger 提交于
Currently numcpus is determined in pid_put_sample which is only called on sched_switch/sched_wakeup sample processing. On a machine with a lot cpus I often saw the last cpu missing. Check for (max) numcpus on every event happening and in the beginning. -> fixes the issue for me. Signed-off-by: NThomas Renninger <trenn@suse.de> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: lenb@kernel.org LKML-Reference: <1298842606-55712-6-git-send-email-trenn@suse.de> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Thomas Renninger 提交于
This fix is needed for eye of gnome and firefox svg viewers. Only Inkscape can handle the broken case. Compare with the other svg_legenda_box declarations, looks like a typo slipped in at this place. Signed-off-by: NThomas Renninger <trenn@suse.de> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: lenb@kernel.org LKML-Reference: <1298842606-55712-5-git-send-email-trenn@suse.de> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Dave Airlie 提交于
* 'nouveau/drm-nouveau-fixes' of /ssd/git/drm-nouveau-next: drm/nv50-nvc0: make sure vma is definitely unmapped when destroying bo
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由 Dave Airlie 提交于
This fixes CVE-2011-1013. Reported-by: Matthiew Herrb (OpenBSD X.org team) Cc: stable@kernel.org Signed-off-by: NDave Airlie <airlied@redhat.com>
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由 Ben Skeggs 提交于
Somehow fixes a misrendering + hang at GDM startup on my NVA8... My first guess would have been stale TLB entries laying around that a new bo then accidentally inherits. That doesn't make a great deal of sense however, as when we mapped the pages for the new bo the TLBs would've gotten flushed anyway. Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
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- 27 2月, 2011 2 次提交
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由 axel lin 提交于
The device table is required to load modules based on modaliases. Signed-off-by: NAxel Lin <axel.lin@gmail.com> Acked-by: NWolfram Sang <w.sang@pengutronix.de> Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>
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由 axel lin 提交于
The device table is required to load modules based on modaliases. Signed-off-by: NAxel Lin <axel.lin@gmail.com> Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>
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- 26 2月, 2011 17 次提交
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由 Takashi Iwai 提交于
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由 Thomas Gleixner 提交于
When the per cpu timer is marked CLOCK_EVT_FEAT_C3STOP, then we only can switch into oneshot mode, when the backup broadcast device supports oneshot mode as well. Otherwise we would try to switch the broadcast device into an unsupported mode unconditionally. This went unnoticed so far as the current available broadcast devices support oneshot mode. Seth unearthed this problem while debugging and working around an hpet related BIOS wreckage. Add the necessary check to tick_is_oneshot_available(). Reported-and-tested-by: NSeth Forshee <seth.forshee@canonical.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> LKML-Reference: <alpine.LFD.2.00.1102252231200.2701@localhost6.localdomain6> Cc: stable@kernel.org # .21 ->
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6由 Linus Torvalds 提交于
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: PM: Make ACPI wakeup from S5 work again when CONFIG_PM_SLEEP is unset
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由 Alexandre Bounine 提交于
Fixes sysfs config attribute to allow access to entire 16MB maintenance space of RapidIO devices. Signed-off-by: NAlexandre Bounine <alexandre.bounine@idt.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Thomas Moll <thomas.moll@sysgo.com> Cc: Micha Nelissen <micha@neli.hopto.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Alexander Gordeev 提交于
Initialize ts_real.flags to fix compiler warning about possible uninitialized use of this field. Signed-off-by: NAlexander Gordeev <lasaine@lvk.cs.msu.su> Cc: john stultz <johnstul@us.ibm.com> Cc: Rodolfo Giometti <giometti@linux.it> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Hugh Dickins 提交于
It seems odd that truncate_inode_pages_range(), called not only when truncating but also when evicting inodes, has mem_cgroup_uncharge_start and _end() batching in its second loop to clear up a few leftovers, but not in its first loop that does almost all the work: add them there too. Signed-off-by: NHugh Dickins <hughd@google.com> Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: NBalbir Singh <balbir@linux.vnet.ibm.com> Acked-by: NDaisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Andi Kleen 提交于
The THP code didn't pass the correct interleaving shift to the memory policy code. Fix this here by adjusting for the order. Signed-off-by: NAndi Kleen <ak@linux.intel.com> Reviewed-by: NChristoph Lameter <cl@linux.com> Acked-by: NAndrea Arcangeli <aarcange@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jan Kara 提交于
A race can occur when io_submit() races with io_destroy(): CPU1 CPU2 io_submit() do_io_submit() ... ctx = lookup_ioctx(ctx_id); io_destroy() Now do_io_submit() holds the last reference to ctx. ... queue new AIO put_ioctx(ctx) - frees ctx with active AIOs We solve this issue by checking whether ctx is being destroyed in AIO submission path after adding new AIO to ctx. Then we are guaranteed that either io_destroy() waits for new AIO or we see that ctx is being destroyed and bail out. Cc: Nick Piggin <npiggin@kernel.dk> Reviewed-by: NJeff Moyer <jmoyer@redhat.com> Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Nick Piggin 提交于
aio-dio-invalidate-failure GPFs in aio_put_req from io_submit. lookup_ioctx doesn't implement the rcu lookup pattern properly. rcu_read_lock does not prevent refcount going to zero, so we might take a refcount on a zero count ioctx. Fix the bug by atomically testing for zero refcount before incrementing. [jack@suse.cz: added comment into the code] Reviewed-by: NJeff Moyer <jmoyer@redhat.com> Signed-off-by: NNick Piggin <npiggin@kernel.dk> Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Namhyung Kim 提交于
When pfn_valid_within() failed 'iter' was incremented twice. Signed-off-by: NNamhyung Kim <namhyung@gmail.com> Reviewed-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: NMinchan Kim <minchan.kim@gmail.com> 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 Lei Xu 提交于
In linux rtc_time struct, tm_mon range is 0~11, tm_wday range is 0~6, while in RTC HW REG, month range is 1~12, day of the week range is 1~7, this patch adjusts difference of them. The efect of this bug was that most of month will be operated on as the next month by the hardware (When in Jan it maybe even worse). For example, if in May, software wrote 4 to the hardware, which handled it as April. Then the logic would be different between software and hardware, which would cause weird things to happen. Signed-off-by: NLei Xu <B33228@freescale.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: john stultz <johnstul@us.ibm.com> Cc: Jack Lan <jack.lan@freescale.com> 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 Timo Warns 提交于
The kernel automatically evaluates partition tables of storage devices. The code for evaluating LDM partitions (in fs/partitions/ldm.c) contains a bug that causes a kernel oops on certain corrupted LDM partitions. A kernel subsystem seems to crash, because, after the oops, the kernel no longer recognizes newly connected storage devices. The patch changes ldm_parse_vmdb() to Validate the value of vblk_size. Signed-off-by: NTimo Warns <warns@pre-sense.de> Cc: Eugene Teo <eugeneteo@kernel.sg> Acked-by: NRichard Russon <ldm@flatcap.org> Cc: Harvey Harrison <harvey.harrison@gmail.com> 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 Mel Gorman 提交于
should_continue_reclaim() for reclaim/compaction allows scanning to continue even if pages are not being reclaimed until the full list is scanned. In terms of allocation success, this makes sense but potentially it introduces unwanted latency for high-order allocations such as transparent hugepages and network jumbo frames that would prefer to fail the allocation attempt and fallback to order-0 pages. Worse, there is a potential that the full LRU scan will clear all the young bits, distort page aging information and potentially push pages into swap that would have otherwise remained resident. This patch will stop reclaim/compaction if no pages were reclaimed in the last SWAP_CLUSTER_MAX pages that were considered. For allocations such as hugetlbfs that use __GFP_REPEAT and have fewer fallback options, the full LRU list may still be scanned. Order-0 allocation should not be affected because RECLAIM_MODE_COMPACTION is not set so the following avoids the gfp_mask being examined: if (!(sc->reclaim_mode & RECLAIM_MODE_COMPACTION)) return false; A tool was developed based on ftrace that tracked the latency of high-order allocations while transparent hugepage support was enabled and three benchmarks were run. The "fix-infinite" figures are 2.6.38-rc4 with Johannes's patch "vmscan: fix zone shrinking exit when scan work is done" applied. STREAM Highorder Allocation Latency Statistics fix-infinite break-early 1 :: Count 10298 10229 1 :: Min 0.4560 0.4640 1 :: Mean 1.0589 1.0183 1 :: Max 14.5990 11.7510 1 :: Stddev 0.5208 0.4719 2 :: Count 2 1 2 :: Min 1.8610 3.7240 2 :: Mean 3.4325 3.7240 2 :: Max 5.0040 3.7240 2 :: Stddev 1.5715 0.0000 9 :: Count 111696 111694 9 :: Min 0.5230 0.4110 9 :: Mean 10.5831 10.5718 9 :: Max 38.4480 43.2900 9 :: Stddev 1.1147 1.1325 Mean time for order-1 allocations is reduced. order-2 looks increased but with so few allocations, it's not particularly significant. THP mean allocation latency is also reduced. That said, allocation time varies so significantly that the reductions are within noise. Max allocation time is reduced by a significant amount for low-order allocations but reduced for THP allocations which presumably are now breaking before reclaim has done enough work. SysBench Highorder Allocation Latency Statistics fix-infinite break-early 1 :: Count 15745 15677 1 :: Min 0.4250 0.4550 1 :: Mean 1.1023 1.0810 1 :: Max 14.4590 10.8220 1 :: Stddev 0.5117 0.5100 2 :: Count 1 1 2 :: Min 3.0040 2.1530 2 :: Mean 3.0040 2.1530 2 :: Max 3.0040 2.1530 2 :: Stddev 0.0000 0.0000 9 :: Count 2017 1931 9 :: Min 0.4980 0.7480 9 :: Mean 10.4717 10.3840 9 :: Max 24.9460 26.2500 9 :: Stddev 1.1726 1.1966 Again, mean time for order-1 allocations is reduced while order-2 allocations are too few to draw conclusions from. The mean time for THP allocations is also slightly reduced albeit the reductions are within varianes. Once again, our maximum allocation time is significantly reduced for low-order allocations and slightly increased for THP allocations. Anon stream mmap reference Highorder Allocation Latency Statistics 1 :: Count 1376 1790 1 :: Min 0.4940 0.5010 1 :: Mean 1.0289 0.9732 1 :: Max 6.2670 4.2540 1 :: Stddev 0.4142 0.2785 2 :: Count 1 - 2 :: Min 1.9060 - 2 :: Mean 1.9060 - 2 :: Max 1.9060 - 2 :: Stddev 0.0000 - 9 :: Count 11266 11257 9 :: Min 0.4990 0.4940 9 :: Mean 27250.4669 24256.1919 9 :: Max 11439211.0000 6008885.0000 9 :: Stddev 226427.4624 186298.1430 This benchmark creates one thread per CPU which references an amount of anonymous memory 1.5 times the size of physical RAM. This pounds swap quite heavily and is intended to exercise THP a bit. Mean allocation time for order-1 is reduced as before. It's also reduced for THP allocations but the variations here are pretty massive due to swap. As before, maximum allocation times are significantly reduced. Overall, the patch reduces the mean and maximum allocation latencies for the smaller high-order allocations. This was with Slab configured so it would be expected to be more significant with Slub which uses these size allocations more aggressively. The mean allocation times for THP allocations are also slightly reduced. The maximum latency was slightly increased as predicted by the comments due to reclaim/compaction breaking early. However, workloads care more about the latency of lower-order allocations than THP so it's an acceptable trade-off. Signed-off-by: NMel Gorman <mel@csn.ul.ie> Acked-by: NAndrea Arcangeli <aarcange@redhat.com> Acked-by: NJohannes Weiner <hannes@cmpxchg.org> Reviewed-by: NMinchan Kim <minchan.kim@gmail.com> Acked-by: NAndrea Arcangeli <aarcange@redhat.com> Acked-by: NRik van Riel <riel@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Matti J. Aaltonen 提交于
The regulator framework is used for power management. The regulators are only named in the driver code, the actual control stuff is in the board file for each architecture or use case. The PN544 chip has three regulators that can be controlled or not - depending on the architecture where the chip is being used. So some of the regulators may not be controllable. In our current case the third regulator, which was missing from the code, went unnoticed because we didn't need to control it. To be as general as possible - in this respect - the driver needs to list all regulators. Then the board file can be used to actually set the usage. Signed-off-by: NMatti J. Aaltonen <matti.j.aaltonen@nokia.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Matti J. Aaltonen 提交于
Spell out the NFC acronym when it's shown for the first time. Signed-off-by: NMatti J. Aaltonen <matti.j.aaltonen@nokia.com> Acked-by: NWolfram Sang <w.sang@pengutronix.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 FUJITA Tomonori 提交于
swiotlb's map_page wrongly calls panic() when it can't find a buffer fit for device's dma mask. It should return an error instead. Devices with an odd dma mask (i.e. under 4G) like b44 network card hit this bug (the system crashes): http://marc.info/?l=linux-kernel&m=129648943830106&w=2 If swiotlb returns an error, b44 driver can use the own bouncing mechanism. Reported-by: NChuck Ebbert <cebbert@redhat.com> Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: NArkadiusz Miskiewicz <arekm@maven.pl> 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 Harry Wei 提交于
I have translated some kernel documentation so I wish to maintain the Chinese documentation in our kernel directories. Signed-off-by: NHarry Wei <harryxiyou@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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