Messages in this thread | | | From | Nick Piggin <> | Subject | Re: [PATCH] SLUB: revert direct page allocator pass through | Date | Sat, 24 Jan 2009 02:37:09 +1100 |
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On Saturday 24 January 2009 02:27:29 Christoph Lameter wrote: > On Sat, 24 Jan 2009, Nick Piggin wrote: > > > I thought higher order allocations were not supposed to be used in > > > performance critical paths? > > > > ? You use them all the time in SLUB alone. > > But SLUB compensates for the slow higher order allocs by using them as > buffers for smaller objects.. The higher order allocs are in the slow > paths.
I don't quite know what you're asking of me. If you see higher order allocations in performance critical code, then you answer your own question?
However, I don't know if netperf udp 4K over loopback is totally realistic. Maybe real network drivers have different allocation patterns. If I were you I wouldn't be too hasty to make big changes based on that alone, if it could introduce regression in somewhere more important.
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