[PATCH] sched: disable hrtick implementation

[Justin Madru]

The hrtick implementation in 2.6.25 and .26 has been known to cause boot
problems with at least Intel GMA cards. see:

https://bugs.freedesktop.org/show_bug.cgi?id=15602
http://bugzilla.kernel.org/show_bug.cgi?id=10892

A full fix to hrtick went into 2.6.27 
(31656519e132f6612584815f128c83976a9aaaef),
but that fix is too intrusive to backport. Henceforth, we default to 
disable hrtick.

Signed-off-by: Justin Madru <jdm64@xxxxxxxxx>
Tested-by: Justin Madru <jdm64@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>

--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -4,7 +4,7 @@
SCHED_FEAT(AFFINE_WAKEUPS, 1)
SCHED_FEAT(CACHE_HOT_BUDDY, 1)
SCHED_FEAT(SYNC_WAKEUPS, 1)
-SCHED_FEAT(HRTICK, 1)
+SCHED_FEAT(HRTICK, 0)
SCHED_FEAT(DOUBLE_TICK, 0)
SCHED_FEAT(NORMALIZED_SLEEPER, 1)
SCHED_FEAT(DEADLINE, 1)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/