https://github.com/torvalds/linux
Revision 4ba281d5bd9907355e6b79fb72049c9ed50cc670 authored by Yury Norov on 11 May 2018, 23:01:39 UTC, committed by Linus Torvalds on 12 May 2018, 00:28:45 UTC
test_find_first_bit() is intentionally sub-optimal, and may cause soft
lockup due to long time of run on some systems.  So decrease length of
bitmap to traverse to avoid lockup.

With the change below, time of test execution doesn't exceed 0.2 seconds
on my testing system.

Link: http://lkml.kernel.org/r/20180420171949.15710-1-ynorov@caviumnetworks.com
Fixes: 4441fca0a27f5 ("lib: test module for find_*_bit() functions")
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent c9cf87e
History
Tip revision: 4ba281d5bd9907355e6b79fb72049c9ed50cc670 authored by Yury Norov on 11 May 2018, 23:01:39 UTC
lib/find_bit_benchmark.c: avoid soft lockup in test_find_first_bit()
Tip revision: 4ba281d
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