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On Wed, 2008-05-28 at 04:47 +0200, Andi Kleen wrote: > > So... why not just remove the setting of __GFP_NORETRY? Why is it > > wrong to oom-kill things in this case? > > When the 16MB zone overflows (which can be common in some workloads) > calling the OOM killer is pretty useless because it has barely any > real user data [only exception would be the "only 16MB" case Alan > mentioned]. Killing random processes in this case is bad. > > I think for 16MB __GFP_NORETRY is ok because there should be > nothing freeable in there so looping is useless. Only exception would be the > "only 16MB total" case again but I'm not sure 2.6 supports that at all > on x86. > > On the other hand d_a_c() does more allocations than just 16MB, especially > on 64bit and the other zones need different strategies. Okay, so how about this then ? Signed-off-by: Ingo Molnar <mingo@elte.hu> |
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