Messages in this thread | | | Date | Thu, 1 Sep 2005 19:28:40 -0700 | From | Andrew Morton <> | Subject | Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll() |
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Andi Kleen <ak@suse.de> wrote: > > On Friday 02 September 2005 04:08, Andrew Morton wrote: > > > I suppose I'll queue it up in -mm for a while, although I'm a bit dubious > > about the whole idea... We'll gain some and we'll lose some - how do we > > know it's a net gain? > > I suspect it'll gain more than it loses. The only case where it might > not gain is immediately someone reading the data from the page cache again > after the write.
That's a pretty common case - temporary files.
> But I suppose that's far less frequent than writing the data.
yup.
Hiro, could you please send through a summary of the performance testing results sometime? Runtimes rather than oprofile output? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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