Messages in this thread |  | | | Date | Tue, 13 Mar 2007 21:37:07 +0530 | | From | Srivatsa Vaddagiri <> | | Subject | Re: [RFC][PATCH 1/7] Resource counters |
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On Tue, Mar 13, 2007 at 06:41:05PM +0300, Pavel Emelianov wrote: > > right, but atomic ops have much less impact on most > > architectures than locks :) > > Right. But atomic_add_unless() is slower as it is > essentially a loop. See my previous letter in this sub-thread.
If I am not mistaken, you shouldn't loop in normal cases, which means it boils down to a atomic_read() + atomic_cmpxch()
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