Peter Zijlstra 6ad4c18884 sched: Fix balance vs hotplug race ... Since (e761b77: cpu hotplug, sched: Introduce cpu_active_map and redo sched domain managment) we have cpu_active_mask which is suppose to rule scheduler migration and load-balancing, except it never (fully) did. The particular problem being solved here is a crash in try_to_wake_up() where select_task_rq() ends up selecting an offline cpu because select_task_rq_fair() trusts the sched_domain tree to reflect the current state of affairs, similarly select_task_rq_rt() trusts the root_domain. However, the sched_domains are updated from CPU_DEAD, which is after the cpu is taken offline and after stop_machine is done. Therefore it can race perfectly well with code assuming the domains are right. Cure this by building the domains from cpu_active_mask on CPU_DOWN_PREPARE. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2009-12-06 21:10:56 +01:00
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acpi	ACPI: remove acpi_device_uid() and related stuff	2009-09-25 15:09:49 -04:00
asm-generic	fcntl: rename F_OWNER_GID to F_OWNER_PGRP	2009-11-17 17:40:33 -08:00
crypto	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2009-09-11 09:38:37 -07:00
drm	Merge branch 'drm-next' of ../drm-next into drm-linus	2009-10-08 14:03:05 +10:00
keys	RxRPC: Use uX/sX rather than uintX_t/intX_t types	2009-09-16 00:01:13 -07:00
linux	sched: Fix balance vs hotplug race	2009-12-06 21:10:56 +01:00
math-emu
media	V4L/DVB (13019): video: initial support for ADV7180	2009-09-19 00:53:39 -03:00
mtd
net	Merge branch 'security' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6	2009-11-30 16:47:16 -08:00
pcmcia	Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6	2009-12-05 09:42:59 -08:00
rdma	trivial: fix typo "to to" in multiple files	2009-09-21 15:14:55 +02:00
rxrpc
scsi	[SCSI] fix async scan add/remove race resulting in an oops	2009-11-26 09:43:39 -06:00
sound	Merge branch 'topic/ymfpci' into for-linus	2009-09-10 15:33:09 +02:00
trace	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-05 15:30:21 -08:00
video	davinci-fb-frame-buffer-driver-for-ti-da8xx-omap-l1xx-v4	2009-09-23 07:39:51 -07:00
xen
Kbuild