Peter Zijlstra 9886167d20 perf: Fix perf_pmu_migrate_context ...

While auditing the list_entry usage due to a trinity bug I found that
perf_pmu_migrate_context violates the rules for
perf_event::event_entry.

The problem is that perf_event::event_entry is a RCU list element, and
hence we must wait for a full RCU grace period before re-using the
element after deletion.

Therefore the usage in perf_pmu_migrate_context() which re-uses the
entry immediately is broken. For now introduce another list_head into
perf_event for this specific usage.

This doesn't actually fix the trinity report because that never goes
through this code.

Signed-off-by: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

2013-10-04 09:58:53 +02:00

..

callchain.c

perf: Roll back callchain buffer refcount under the callchain mutex

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

core.c

perf: Fix perf_pmu_migrate_context

2013-10-04 09:58:53 +02:00

hw_breakpoint.c

hw_breakpoint: Introduce "struct bp_cpuinfo"

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

internal.h

perf: Fix mmap() accounting hole

2013-06-19 12:44:13 +02:00

Makefile

…

ring_buffer.c

perf: Fix vmalloc ring buffer pages handling

2013-05-01 12:34:46 +02:00

uprobes.c

uprobes: Fix utask->depth accounting in handle_trampoline()

2013-09-12 08:00:55 +02:00