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    SubjectRe: [patch] measurements, numbers about CONFIG_OPTIMIZE_INLINING=y impact
    On Fri, Jan 09, 2009 at 06:47:19PM +0100, Andi Kleen wrote:
    > On Fri, Jan 09, 2009 at 10:28:01AM -0700, Matthew Wilcox wrote:
    > > On Fri, Jan 09, 2009 at 06:20:11PM +0100, Andi Kleen wrote:
    > > > Also cc Honza in case he has comments (you might want
    > > > to review more of the thread in the archives)
    > >
    > > I think this particular bug is already known and discussed:
    >
    > I thought so initially too, but:
    >
    > >
    > > http://gcc.gnu.org/ml/gcc/2008-12/msg00365.html
    > >
    > > and it hints at being fixed with gcc 4.4. Does anyone want to test
    > > that?
    >
    > Hugh already tested with 4.4 and it didn't work well. At least
    > a lot of the low level asm inlines were not inlined.
    > So it looks like it's still mistuned for the kernel.

    That seems like valuable feedback to give to the GCC developers.

    Richi, you can find the whole thread at

    http://marc.info/?l=linux-fsdevel&m=123150610901773&w=2

    and http://marc.info/?l=linux-fsdevel&m=123150834405285&w=2 is also
    relevant.

    --
    Matthew Wilcox Intel Open Source Technology Centre
    "Bill, look, we understand that you're interested in selling us this
    operating system, but compare it to ours. We can't possibly take such
    a retrograde step."


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