Messages in this thread | | | Date | Tue, 6 Jan 2009 08:59:52 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [PATCH][RFC]: mutex: adaptive spin |
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On Tue, 6 Jan 2009, Ingo Molnar wrote: > > So instead of the BUG_ON() we could emit a WARN_ONCE() perhaps, plus not > do any spinning and just block - resulting in an uninterruptible task > (that the user will probably notice) and a scary message in the syslog? > [all in the slowpath]
Sure. You could put it in the adaptive function thing, with something like
if (WARN_ONCE(waiter == owner)) return 1;
which should fall back on the old behavior and do the one-time warning.
Linus
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