The patch titled
slub-core-add-explanation-for-locking-fix
has been removed from the -mm tree. Its filename was
slub-core-add-explanation-for-locking-fix.patch
This patch was dropped because it was folded into slub-core.patch
------------------------------------------------------
Subject: slub-core-add-explanation-for-locking-fix
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 16 ++++++++--------
1 files changed, 8 insertions(+), 8 deletions(-)
diff -puN mm/slub.c~slub-core-add-explanation-for-locking-fix mm/slub.c
--- a/mm/slub.c~slub-core-add-explanation-for-locking-fix
+++ a/mm/slub.c
@@ -28,7 +28,7 @@
*
* The slab_lock protects operations on the object of a particular
* slab and its metadata in the page struct. If the slab lock
- * has been taken the no allocations nor frees can be performed
+ * has been taken then no allocations nor frees can be performed
* on the objects in the slab nor can the slab be added or removed
* from the partial or full lists since this would mean modifying
* the page_struct of the slab.
@@ -48,19 +48,19 @@
* off a list. We take the list_lock and then look for a page on the list
* to use. While we do that objects in the slabs may be freed so we can
* only operate on the slab if we have also taken the slab_lock. So we use
- * a slab_try_lock() on the page. If trylock was successful then no frees
+ * a slab_trylock() on the page. If trylock was successful then no frees
* can occur anymore and we can use the slab for allocations etc. If the
- * slab_try_lock does not succeed then frees are occur to the slab and
- * we better stay away from it for awhile since we may cause a bouncing
- * cacheline if we would try to acquire the lock. So go onto the next slab.
+ * slab_trylock() does not succeed then frees are in progress in the slab and
+ * we must stay away from it for a while since we may cause a bouncing
+ * cacheline if we try to acquire the lock. So go onto the next slab.
* If all pages are busy then we may allocate a new slab instead of reusing
- * a partial slab. A new slab has no one operating on it and thus there is
+ * a partial slab. A new slab has noone operating on it and thus there is
* no danger of cacheline contention.
*
* Interrupts are disabled during allocation and deallocation in order to
* make the slab allocator safe to use in the context of an irq. In addition
- * interrupts are disabled to insure that the processor does not change
- * while handling per_cpu slabs.
+ * interrupts are disabled to ensure that the processor does not change
+ * while handling per_cpu slabs, due to kernel preemption.
*
* SLUB assigns one slab for allocation to each processor.
* Allocations only occur from these slabs called cpu slabs.
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
slab-introduce-krealloc.patch
git-acpi.patch
git-alsa.patch
git-alsa-fixup.patch
git-agpgart.patch
git-agp-build-fix.patch
git-cpufreq-borkage-fix.patch
git-powerpc.patch
ppc4xx_sgdma-needs-dma_mappingh.patch
revert-gregkh-driver-remove-struct-subsystem-as-it-is-no-longer-needed.patch
fix-gregkh-driver-uevent-use-add_uevent_var-instead-of-open-coding-it.patch
more-fix-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
even-more-fix-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
even-even-more-fix-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
define-platform-wakeup-hook-use-in-pci_enable_wake.patch
dev_dbg-check-dev_dbg-arguments.patch
sysfs-binc-printk-fix.patch
git-drm.patch
git-dvb.patch
git-dvb-vs-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
fix-jdelvare-i2c-i2c-del-driver-returns-void-on-powerpc.patch
git-gfs2-nmw.patch
gfs2-printk-warning-fixes.patch
git-ieee1394.patch
sbp2-include-fixes.patch
fw-device-printk-fix.patch
ieee1394-iso-needs-schedh.patch
git-input.patch
git-input-fixup.patch
git-kvm.patch
git-libata-all.patch
ata-printk-warning-fixes.patch
drivers-ata-pata_cmd640c-fix-build-with-config_pm=n.patch
revert-rm-pointless-dmaengine-exports.patch
git-md-accel-fix.patch
git-mmc-build-fix.patch
git-mmc-versus-uevent-use-add_uevent_var-instead-of-open-coding-it.patch
git-mtd.patch
git-mtd-build-fix.patch
git-ubi.patch
git-ubi-fixup.patch
revert-gitpowerpc-ehea-changes.patch
git-netdev-all.patch
reapply-gitpowerpc-ehea-changes.patch
git-netdev-all-export-ieee80211_debug_level.patch
vioc-warning-fix.patch
vioc-cast-warning-fix.patch
git-e1000.patch
git-e1000-fixup-2.patch
git-net.patch
git-net-fixup.patch
git-net-vs-git-netdev-all.patch
sctp-fix-sctp_getsockopt_local_addrs_old-to-use-local-storage-fix.patch
sctp_getsockopt_local_addrs-type-fix.patch
git-net-fix-yamc.patch
irda_device_dongle_init-fix-kzallocgfp_kernel-in-spinlock.patch
rfcomm_worker-fix-wakeup-race.patch
input-rfkill-add-support-for-input-key-to-control-wireless-radio.patch
git-ocfs2.patch
git-parisc.patch
rm9000-serial-driver.patch
fix-gregkh-pci-pci-remove-the-broken-pci_multithread_probe-option.patch
git-pciseg.patch
git-s390.patch
git-s390-fixup.patch
git-s390-vs-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
s390-net-lcs-convert-to-the-kthread-api.patch
git-scsi-misc.patch
scsi-fix-config_scsi_wait_scan=m.patch
git-block-fixup.patch
fix-x86_64-mm-nmi-watchdog-ops.patch
i386-map-enough-initial-memory-to-create-lowmem-mappings-fix.patch
x86_64-unexport-cpu_llc_id.patch
xfs-clean-up-shrinker-games.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear.patch
mm-merge-nopfn-into-fault.patch
smaps-add-clear_refs-file-to-clear-reference.patch
maps2-move-the-page-walker-code-to-lib.patch
maps2-add-proc-pid-pagemap-interface.patch
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks.patch
mm-move-common-segment-checks-to-separate-helper-function-v7.patch
slab-mark-set_up_list3s-__init.patch
extend-print_symbol-capability.patch
slub-core.patch
slub-core-add-explanation-for-locking-fix.patch
slub-core-explain-sizing-of-slabs-in-detail-fix.patch
slub-core-more-statics.patch
slub-enable-tracking-of-full-slabs-fix.patch
slub-add-ability-to-list-alloc--free-callers-per-slab-tidy.patch
slub-user-documentation-fix.patch
mm-optimize-kill_bdev-fix.patch
lazy-freeing-of-memory-through-madv_free-fix.patch
lazy-freeing-of-memory-through-madv_free-sparc-fix.patch
lazy-freeing-of-memory-through-madv_free-vs-mm-madvise-avoid-exclusive-mmap_sem.patch
driver_bfin_serial_core-update.patch
srmcons-fix-kmallocgfp_kernel-inside-spinlock.patch
uml-driver-formatting-fixes-fix.patch
reduce-size-of-task_struct-on-64-bit-machines.patch
mm-shrink-parent-dentries-when-shrinking-slab.patch
merge-sys_clone-sys_unshare-nsproxy-and-namespace-fix-fix-fix.patch
virtual_eisa_root_init-should-be-__init.patch
proc-maps-protection.patch
fix-cycladesh-for-x86_64-and-probably-others-fix.patch
rtc-add-rtc-rs5c313-driver-tidy.patch
rtc-add-rtc-rs5c313-driver-is-busted.patch
enlarge-console-name.patch
move-die-notifier-handling-to-common-code-fixes-2.patch
move-die-notifier-handling-to-common-code-fix-vmalloc_sync_all.patch
fix-sscanf-%n-match-at-end-of-input-string-tidy.patch
parport-dev-driver-model-support-powerpc-fix.patch
cache-pipe-buf-page-address-for-non-highmem-arch-fix.patch
cache-pipe-buf-page-address-for-non-highmem-arch-fix-tidy.patch
add-support-for-deferrable-timers-respun-tidy.patch
linux-sysdevh-needs-to-include-linux-moduleh.patch
time-smp-friendly-alignment-of-struct-clocksource.patch
move-timekeeping-code-to-timekeepingc-fix.patch
ignore-stolen-time-in-the-softlockup-watchdog-fix.patch
fix-kevents-childs-priority-greediness-fix.patch
display-all-possible-partitions-when-the-root-filesystem-failed-to-mount-fix.patch
enhance-initcall_debug-measure-latency-fix.patch
expose-range-checking-functions-from-arch-specific-update-fix.patch
pad-irq_desc-to-internode-cacheline-size-fix.patch
dtlk-fix-error-checks-in-module_init-fix.patch
document-spin_lock_unlocked-rw_lock_unlocked-deprecation-fix.patch
upper-32-bits.patch
define-and-use-new-eventscpu_lock_acquire-and-cpu_lock_release.patch
call-cpu_chain-with-cpu_down_failed-if-cpu_down_prepare-failed-vs-reduce-size-of-task_struct-on-64-bit-machines.patch
kthread-dont-depend-on-work-queues-take-2-fix.patch
fix-kthread_create-vs-freezer-theoretical-race-dont-be-obnoxious.patch
speedup-divides-by-cpu_power-in-scheduler.patch
revert-sched-redundant-reschedule-when-set_user_nice-boosts-a-prio-of-a-task-from-the-expired-array-update.patch
revert-sched-redundant-reschedule-when-set_user_nice-boosts-a-prio-of-a-task-from-the-expired-array.patch
sched-consolidate-sched_clock-drift-adjustments-fix.patch
lutimesat-compat-syscall-and-wire-up-on-x86_64.patch
revert-rtc-add-rtc_merge_alarm.patch
declare-struct-ktime.patch
make-futex_wait-use-an-hrtimer-for-timeout-fix.patch
kprobes-the-on-off-knob-thru-debugfs-updated-fix.patch
kprobes-the-on-off-knob-thru-debugfs-updated-fix-fix-fix.patch
atomich-add-atomic64-cmpxchg-xchg-and-add_unless-to-powerpc.patch
local_t-powerpc-extension.patch
linux-kernel-markers-i386-optimization-fix.patch
signal-timer-event-fds-v9-signalfd-core-fix.patch
signal-timer-event-fds-v9-signalfd-core-fix-fix.patch
signal-timer-event-fds-v9-timerfd-core-fix.patch
signal-timer-event-fds-v9-eventfd-core-fix.patch
signal-timer-event-fds-v9-eventfd-core-fix-fix.patch
revoke-core-code-fix-shared-mapping-revoke.patch
revoke-wire-up-i386-system-calls-x86_64-fix.patch
x86-serial-convert-legacy-com-ports-to-platform-devices-fix.patch
lguest-the-host-code-vs-x86_64-mm-i386-separate-hardware-defined-tss-from-linux-additions.patch
lguest-build-hack.patch
lguest-build-hack-2.patch
fs-convert-core-functions-to-zero_user_page-pass-kmap-type.patch
fs-convert-core-functions-to-zero_user_page-fix-2.patch
ntfs-use-zero_user_page-fix.patch
reiser4-slab-allocators-remove-slab_debug_initial-flag.patch
fbdev-hecuba-framebuffer-driver.patch
vt-add-color-support-to-the-underline-and-italic-attributes-fix.patch
sm501fb-printk-warning-fixes.patch
integrity-new-hooks-fix.patch
integrity-evm-as-an-integrity-service-provider-tidy.patch
integrity-evm-as-an-integrity-service-provider-tidy-fix.patch
integrity-evm-as-an-integrity-service-provider-tidy-fix-2.patch
integrity-ima-integrity_measure-support-tidy.patch
integrity-ima-integrity_measure-support-fix.patch
integrity-ima-integrity_measure-support-fix-2.patch
integrity-tpm-internal-kernel-interface-tidy.patch
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