[PATCH] x86-64: Fix interrupt race in idle callback (3rd try)

Browse source

Idle callbacks has some races when enter_idle() sets isidle and subsequent
interrupts that can happen on that CPU, before CPU goes to idle. Due to this,
an IDLE_END can get called before IDLE_START. To avoid these races, disable
interrupts before enter_idle and make sure that all idle routines do not
enable interrupts before entering idle.

Note that poll_idle() still has a this race as it has to enable interrupts
before going to idle. But, all other idle routines have the race fixed.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>

...

This commit is contained in:

Venkatesh Pallipadi 2006-12-07 02:14:13 +01:00 • committed by Andi Kleen

parent a0429d0d7a

commit d331e739f5

2 changed files with 25 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

19

arch/x86_64/kernel/process.c

View file

8

include/asm-x86_64/processor.h

View file