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authorIngo Molnar <mingo@elte.hu>2006-02-07 12:58:54 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-07 16:12:33 -0800
commite0a602963485a2f109ae1521c0c55507304c63ed (patch)
tree38900590f1d4f129cfd8748949ff62f7d3296aee /Documentation
parent8519fb30e438f8088b71a94a7d5a660a814d3872 (diff)
[PATCH] Fix spinlock debugging delays to not time out too early
The spinlock-debug wait-loop was using loops_per_jiffy to detect too long spinlock waits - but on fast CPUs this led to a way too fast timeout and false messages. The fix is to include a __delay(1) call in the loop, to correctly approximate the intended delay timeout of 1 second. The code assumes that every architecture implements __delay(1) to last around 1/(loops_per_jiffy*HZ) seconds. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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