Rik van Riel
68d1b02a58
sched/numa: Do not set preferred_node on migration to a second choice node ...
Setting the numa_preferred_node for a task in task_numa_migrate
does nothing on a 2-node system. Either we migrate to the node
that already was our preferred node, or we stay where we were.
On a 4-node system, it can slightly decrease overhead, by not
calling the NUMA code as much. Since every node tends to be
directly connected to every other node, running on the wrong
node for a while does not do much damage.
However, on an 8 node system, there are far more bad nodes
than there are good ones, and pretending that a second choice
is actually the preferred node can greatly delay, or even
prevent, a workload from converging.
The only time we can safely pretend that a second choice
node is the preferred node is when the task is part of a
workload that spans multiple NUMA nodes.
Signed-off-by: Rik van Riel <riel@redhat.com>
Tested-by: Vinod Chegu <chegu_vinod@hp.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1397235629-16328-4-git-send-email-riel@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-07 13:33:47 +02:00
mm: per-thread vma caching
2014-04-07 16:35:53 -07:00
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
2014-04-05 13:20:43 -07:00
genirq: Export symbol no_action()
2014-03-22 11:33:09 +01:00
Merge branch 'sched/urgent' into sched/core, to avoid conflicts
2014-05-07 13:15:46 +02:00
kernel: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:36:11 -07:00
printk: fix one circular lockdep warning about console_lock
2014-04-03 16:21:08 -07:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-03-31 11:21:19 -07:00
sched/numa: Do not set preferred_node on migration to a second choice node
2014-05-07 13:33:47 +02:00
tick-sched: Check tick_nohz_enabled in tick_nohz_switch_to_nohz()
2014-04-15 20:26:58 +02:00
This contains two fixes.
2014-04-18 10:16:43 -07:00
Ignore generated file kernel/x509_certificate_list
2013-12-10 18:21:34 +00:00
Merge git://git.infradead.org/users/eparis/audit
2014-04-12 12:38:53 -07:00
audit: Use struct net not pid_t to remember the network namespce to reply in
2014-03-20 10:10:53 -04:00
inotify: Fix reporting of cookies for inotify events
2014-02-18 11:17:17 +01:00
inotify: Fix reporting of cookies for inotify events
2014-02-18 11:17:17 +01:00
Merge git://git.infradead.org/users/eparis/audit
2014-04-12 12:38:53 -07:00
Merge git://git.infradead.org/users/eparis/audit
2014-04-12 12:38:53 -07:00
mm: do not allocate page->ptl dynamically, if spinlock_t fits to long
2013-12-20 12:25:45 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2014-04-03 09:26:18 -07:00
cgroup: newly created dirs and files should be owned by the creator
2014-04-07 16:44:47 -04:00
cgroup: drop const from @buffer of cftype->write_string()
2014-03-19 10:23:54 -04:00
Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-04-02 12:51:41 -07:00
context_tracking: Wrap static key check into more intuitive function name
2013-12-02 20:43:14 +01:00
CPU hotplug: Provide lockless versions of callback registration functions
2014-03-20 13:43:40 +01:00
Merge branch 'akpm' (incoming from Andrew)
2014-04-03 16:22:16 -07:00
wait: WSTOPPED|WCONTINUED doesn't work if a zombie leader is traced by another process
2014-04-07 16:36:06 -07:00
asmlinkage: Make main_extable_sort_needed visible
2014-02-13 18:13:22 -08:00
kernel: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:36:11 -07:00
libata, freezer: avoid block device removal while system is frozen
2013-12-19 13:50:32 -05:00
futex: update documentation for ordering guarantees
2014-04-12 17:57:51 -07:00
compat: Get rid of (get|put)_compat_time(val|spec)
2014-02-02 14:09:12 -08:00
kernel/groups.c: remove return value of set_groups
2014-04-03 16:21:05 -07:00
timer: Remove code redundancy while calling get_nohz_timer_target()
2014-03-20 12:35:46 +01:00
kernel: audit/fix non-modular users of module_init in core code
2014-04-03 16:21:07 -07:00
perf/x86: Warn to early_printk() in case irq_work is too slow
2014-02-21 21:49:07 +01:00
kernel: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:36:11 -07:00
kernel: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:36:11 -07:00
execve: use 'struct filename *' for executable name passing
2014-02-05 12:54:53 -08:00
kernel: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:36:11 -07:00
kthread: ensure locality of task_struct allocations
2014-04-03 16:20:49 -07:00
Merge branch 'x86-asmlinkage-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-03-31 14:13:25 -07:00
modules: use raw_cpu_write for initialization of per cpu refcount.
2014-04-07 16:36:14 -07:00
notifier: Substitute rcu_access_pointer() for rcu_dereference_raw()
2014-02-26 06:35:13 -08:00
padata: Fix wrong usage of rcu_dereference()
2013-12-05 21:28:42 +08:00
kernel/panic.c: display reason at end + pr_emerg
2014-04-07 16:36:08 -07:00
params: improve standard definitions
2013-12-04 14:09:46 +10:30
pid_namespace: pidns_get() should check task_active_pid_ns() != NULL
2014-04-02 16:20:21 -07:00
posix-timers: Convert abuses of BUG_ON to WARN_ON
2013-12-09 16:56:29 +01:00
CPU hotplug notifiers registration fixes for 3.15-rc1
2014-04-07 14:55:46 -07:00
kernel/compat: convert to COMPAT_SYSCALL_DEFINE
2014-03-06 15:35:10 +01:00
kexec: migrate to reboot cpu
2013-12-18 19:04:50 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-04-12 14:49:50 -07:00
res_counter: remove interface for locked charging and uncharging
2014-04-07 16:35:54 -07:00
kernel/resource.c: make reallocate_resource() static
2014-04-03 16:21:07 -07:00
seccomp: fix memory leak on filter attach
2014-04-16 15:25:53 -04:00
kernel: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:36:11 -07:00
smp: Rename __smp_call_function_single() to smp_call_function_single_async()
2014-02-24 14:47:15 -08:00
softirq: Add linux/irq.h to make it compile again
2014-03-19 11:28:14 +01:00
stop_machine: Fix^2 race between stop_two_cpus() and stop_cpus()
2014-03-11 11:33:47 +01:00
mm, thp: add VM_INIT_DEF_MASK and PRCTL_THP_DISABLE
2014-04-07 16:35:52 -07:00
fs, kernel: permit disabling the uselib syscall
2014-04-03 16:21:05 -07:00
hung_task: check the value of "sysctl_hung_task_timeout_sec"
2014-04-07 16:36:07 -07:00
KEYS: correct alignment of system_certificate_list content in assembly file
2013-12-10 18:25:28 +00:00
KEYS: correct alignment of system_certificate_list content in assembly file
2013-12-10 18:25:28 +00:00
genetlink: only pass array to genl_register_family_with_ops()
2013-11-19 16:39:05 -05:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-04-01 11:00:07 -07:00
rcutorture: Gracefully handle NULL cleanup hooks
2014-02-23 09:04:39 -08:00
This includes the final patch to clean up and fix the issue with the
2014-04-12 13:06:10 -07:00
smp: Rename __smp_call_function_single() to smp_call_function_single_async()
2014-02-24 14:47:15 -08:00
kernel: audit/fix non-modular users of module_init in core code
2014-04-03 16:21:07 -07:00
user namespace: fix incorrect memory barriers
2014-04-14 16:03:02 -07:00
kernel/watchdog.c:touch_softlockup_watchdog(): use raw_cpu_write()
2014-04-18 16:40:08 -07:00
sched, treewide: Replace hardcoded nice values with MIN_NICE/MAX_NICE
2014-04-18 12:07:24 +02:00
68d1b02a58