Messages in this thread | | | Date | Fri, 20 Oct 2006 09:36:57 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [PATCH 1/3] Fix COW D-cache aliasing on fork |
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On Sat, 21 Oct 2006, Nick Piggin wrote: > > I didn't think that would work if there is no TLB. But if the writeback > can cause a TLB reload, and then bypass the readonly protection, then > yes would close all races.
On the other hand, doing the cache flush at COW time is "kind of equivalent" to just doing it after the TLB flush. It's now just _much_ after the flush ;)
So maybe the COW D$ aliasing patch-series is just the right thing to do. Not worry about D$ at _all_ when doing the actual fork, and only worry about it on an actual COW event. Hmm?
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