Stephane Eranian 1d9d8639c0 perf,x86: fix kernel crash with PEBS/BTS after suspend/resume ...

This patch fixes a kernel crash when using precise sampling (PEBS)
after a suspend/resume. Turns out the CPU notifier code is not invoked
on CPU0 (BP). Therefore, the DS_AREA (used by PEBS) is not restored properly
by the kernel and keeps it power-on/resume value of 0 causing any PEBS
measurement to crash when running on CPU0.

The workaround is to add a hook in the actual resume code to restore
the DS Area MSR value. It is invoked for all CPUS. So for all but CPU0,
the DS_AREA will be restored twice but this is harmless.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2013-03-15 09:26:35 -07:00

..

alpha

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

arc

ARC: split elf.h into uapi and export it for userspace

2013-02-27 20:00:26 +05:30

arm

Fixes:

2013-03-12 20:25:53 -07:00

arm64

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2013-03-02 08:34:06 -08:00

avr32

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

blackfin

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

c6x

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-02-26 20:16:07 -08:00

cris

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

frv

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

h8300

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

hexagon

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-02-26 20:16:07 -08:00

ia64

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

m32r

UAPI: fix endianness conditionals in M32R's asm/stat.h

2013-03-13 15:21:49 -07:00

m68k

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

metag

metag: Inhibit NUMA balancing.

2013-03-04 10:29:19 +00:00

microblaze

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

mips

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

mn10300

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

openrisc

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

parisc

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

powerpc

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

s390

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

score

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

sh

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

sparc

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2013-03-02 08:34:06 -08:00

tile

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

um

um: Use tty_port in SIGWINCH handler

2013-03-11 10:08:04 +01:00

unicore32

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

x86

perf,x86: fix kernel crash with PEBS/BTS after suspend/resume

2013-03-15 09:26:35 -07:00

xtensa

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

.gitignore

…

Kconfig

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00