Mike Galbraith 5258f386ea sched/autogroup: Fix crash on reboot when autogroup is disabled ... Due to these two commits: 8323f26ce3 sched: Fix race in task_group() 800d4d30c8 sched, autogroup: Stop going ahead if autogroup is disabled ... autogroup scheduling's dynamic knobs are wrecked. With both patches applied, all you have to do to crash a box is disable autogroup during boot up, then reboot.. boom, NULL pointer dereference due to 800d4d30 not allowing autogroup to move things, and 8323f26ce making that the only way to switch runqueues. Remove most of the (dysfunctional) knobs and turn the remaining sched_autogroup_enabled knob readonly. If the user fiddles with cgroups hereafter, once tasks are moved, autogroup won't mess with them again unless they call setsid(). No knobs, no glitz, nada, just a cute little thing folks can turn on if they don't want to muck about with cgroups and/or systemd. Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Xiaotian Feng <xtfeng@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Xiaotian Feng <dannyfeng@tencent.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: <stable@vger.kernel.org> # v3.6 Link: http://lkml.kernel.org/r/1351451963.4999.8.camel@maggy.simpson.net Signed-off-by: Ingo Molnar <mingo@kernel.org>		2012-10-30 10:26:04 +01:00
..
auto_group.c	sched/autogroup: Fix crash on reboot when autogroup is disabled	2012-10-30 10:26:04 +01:00
auto_group.h	sched/autogroup: Fix crash on reboot when autogroup is disabled	2012-10-30 10:26:04 +01:00
clock.c
core.c	sched: Update sched_domains_numa_masks[][] when new cpus are onlined	2012-10-05 13:54:48 +02:00
cpupri.c	sched: Fix minor code style issues	2012-07-26 11:47:00 +02:00
cpupri.h
cputime.c	vtime: Consolidate system/idle context detection	2012-09-25 15:42:37 +02:00
debug.c	sched/debug: Fix printing large integers on 32-bit platforms	2012-05-14 15:05:28 +02:00
fair.c	sched: Add WAKEUP_PREEMPTION feature flag, on by default	2012-10-16 10:05:27 +02:00
features.h	sched: Add WAKEUP_PREEMPTION feature flag, on by default	2012-10-16 10:05:27 +02:00
idle_task.c	sched/nohz: Rewrite and fix load-avg computation -- again	2012-07-05 20:58:13 +02:00
Makefile	sched: Move cputime code to its own file	2012-08-20 13:05:17 +02:00
rt.c	sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW	2012-09-13 16:52:04 +02:00
sched.h	sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW	2012-09-13 16:52:04 +02:00
stats.c	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
stats.h
stop_task.c	sched: Fix migration thread runtime bogosity	2012-08-13 18:41:55 +02:00