Re: Race between vmtruncate and mapped areas?
From: Daniel McNeil <hidden>
Date: 2003-05-17 00:14:48
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On Thu, 2003-05-15 at 16:17, Andrea Arcangeli wrote:
no, the spin_lock only acts as a barrier in one way, not both ways, so an smp_something is still needed.
Can you explain this more? On a x86, isn't a spin_lock a lock; dec instruction and the rmb() a lock; addl. I thought x86 instructions with lock prefix provided a memory barrier. Just curious, -- Daniel McNeil [off-list ref] -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"aart@kvack.org"> aart@kvack.org </a>