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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-05-12 12:45:25 +0100 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2022-05-02 14:27:22 +0300 |
| commit | debc8ee9afbcf23705931ec8e5a69022a5c2a4bd (patch) | |
| tree | 20f2014c4ab020cfa607113063d75cc899856687 /scripts/gdb/linux/modules.py | |
| parent | d5eacbf3ff685410c29eedefcc19f58efb2a83e4 (diff) | |
perf/core: Avoid removing shared pmu_context on unregister
In commit 1fd7e4169954 ("perf/core: Remove perf_cpu_context::unique_pmu"),
the search for another user of the pmu_cpu_context was removed, and so
we unconditionally free it during perf_pmu_unregister. This leads to
random corruption later and a BUG at mm/percpu.c:689.
v2: Check for shared pmu_contexts under the mutex.
Fixes: 1fd7e4169954 ("perf/core: Remove perf_cpu_context::unique_pmu")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: David Carrillo-Cisneros <davidcc@google.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <stable@vger.kernel.org> # v4.11+
Link: http://patchwork.freedesktop.org/patch/msgid/20170512114525.17575-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'scripts/gdb/linux/modules.py')
0 files changed, 0 insertions, 0 deletions