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| author | Chris Wilson | 2020-07-25 19:51:10 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2020-07-25 21:47:42 +0200 |
| commit | a7ef9b28aa8d72a1656fa6f0a01bbd1493886317 (patch) | |
| tree | dc43e39c24124df11dc97333de748b4c895ca91f /drivers/md | |
| parent | 23ee3e4e5bd27bdbc0f1785eef7209ce872794c7 (diff) | |
locking/lockdep: Fix overflow in presentation of average lock-time
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
Diffstat (limited to 'drivers/md')
0 files changed, 0 insertions, 0 deletions