Peter Zijlstra e3703f8cdf perf: Fix hotplug splat ...

Drew Richardson reported that he could make the kernel go *boom* when hotplugging
while having perf events active.

It turned out that when you have a group event, the code in
__perf_event_exit_context() fails to remove the group siblings from
the context.

We then proceed with destroying and freeing the event, and when you
re-plug the CPU and try and add another event to that CPU, things go
*boom* because you've still got dead entries there.

Reported-by: Drew Richardson <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

2014-02-27 12:38:03 +01:00

..

callchain.c

perf: Roll back callchain buffer refcount under the callchain mutex

2013-08-16 17:55:50 +02:00

core.c

perf: Fix hotplug splat

2014-02-27 12:38:03 +01:00

hw_breakpoint.c

hw_breakpoint: Introduce "struct bp_cpuinfo"

2013-06-20 17:58:57 +02:00

internal.h

perf: Fix arch_perf_out_copy_user default

2013-11-06 12:34:25 +01:00

Makefile

…

ring_buffer.c

perf: Optimize ring-buffer write by depending on control dependencies

2013-12-11 15:53:22 +01:00

uprobes.c

Merge tag 'trace-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2014-01-22 16:35:21 -08:00