Re: [patch] waitqueue optimization, 2.4.0-test7

From: Andrea Arcangeli (andrea@suse.de)
Date: Mon Aug 28 2000 - 20:03:56 EST


On Mon, 28 Aug 2000 yodaiken@fsmlabs.com wrote:

>On Mon, Aug 28, 2000 at 07:51:55PM +0200, Ingo Molnar wrote:
>> we have a number of other places that rely on clear_bit() being atomic -
>> if this isnt true anymore on Alpha then we could make it nonatomic on x86
>
>So what is the semantics of a non-atomic clear-bit?

clear_bit (and all the other bitops except test_bit) have to be atomic.

Andrea

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