Messages in this thread | | | Date | Tue, 3 Apr 2007 19:28:41 +0200 | From | Andi Kleen <> | Subject | Re: missing madvise functionality |
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On Tue, Apr 03, 2007 at 10:20:02AM -0700, Ulrich Drepper wrote: > Andi Kleen wrote: > > Why do you need a lock for that? I don't see any problem with > > two threads doing that in parallel. The kernel would > > serialize it internally and one would fail, but that shouldn't > > be a problem. > > There is no lock at all at userlevel. I'm talking about locks in the > kernel.
mmap_sem? Your new operation wouldn't solve that neither.
There were some proposals to fix mmap_sem (it's a big issue for futexes too) but they're are quite involved.
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