Messages in this thread |  | | Subject | Re: recursive spinlocks. Shoot. | From | Alan Cox <> | Date | 19 May 2003 18:57:58 +0100 |
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On Llu, 2003-05-19 at 18:27, Peter T. Breuer wrote: > :-). Well, whaddya know. Both read and write of a int (declared > volatile) are atomic on ia32.
Except when they aren't. There are ppro SMP issues about ordering of unlocked stores in some situations. Thats why the PPro generates lock movb $0, foo for the unlock on PPro
Fixable however by PPro specific lock ops
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