Messages in this thread | | | Date | Wed, 30 Mar 2016 11:38:39 +0100 | From | Mel Gorman <> | Subject | Re: [PATCH] Revert "mm/page_alloc: protect pcp->batch accesses with ACCESS_ONCE" |
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On Wed, Mar 30, 2016 at 10:22:07AM +0000, He Kuang wrote: > This reverts commit 998d39cb236fe464af86a3492a24d2f67ee1efc2. > > When local irq is disabled, a percpu variable does not change, so we can > remove the access macros and let the compiler optimize the code safely. >
batch can be changed from other contexts. Why is this safe?
-- Mel Gorman SUSE Labs
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