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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-07-25 19:51:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-03 11:19:24 +0200 |
| commit | c75c7581937bf2668bcba1d958ff48954d8bba88 (patch) | |
| tree | 1dd6f906eb05901d62aae57c2582bd6828c66406 /tools/perf/scripts/python/netdev-times.py | |
| parent | 28bec409535ee09f7f121807cdb9e394eab47562 (diff) | |
locking/lockdep: Fix overflow in presentation of average lock-time
[ Upstream commit a7ef9b28aa8d72a1656fa6f0a01bbd1493886317 ]
Though the number of lock-acquisitions is tracked as unsigned long, this
is passed as the divisor to div_s64() which interprets it as a s32,
giving nonsense values with more than 2 billion acquisitons. E.g.
acquisitions holdtime-min holdtime-max holdtime-total holdtime-avg
-------------------------------------------------------------------------
2350439395 0.07 353.38 649647067.36 0.-32
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20200725185110.11588-1-chris@chris-wilson.co.uk
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
0 files changed, 0 insertions, 0 deletions