Messages in this thread | | | Date | Tue, 29 Jul 2008 07:46:32 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: x86: Is there still value in having a special tlb flush IPI vector? |
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Andi Kleen wrote: >> Yes, but it's only held briefly to put things onto the list. It doesn't >> get held over the whole IPI transaction as the old smp_call_function >> did, and the tlb flush code still does. RCU is used to manage the list >> walk and freeing, so there's no long-held locks there either. >> > > If it bounces regularly it will still hurt. >
We could convert smp_call_function_mask to use a multi-vector scheme like tlb_64.c if that turns out to be an issue.
J
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