[lkml]   [2007]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 0/5] make slab gfp fair
    On Mon, 2007-05-14 at 13:06 -0700, Christoph Lameter wrote:
    > On Mon, 14 May 2007, Peter Zijlstra wrote:
    > > > Hmmm.. Maybe we could do that.... But what I had in mind was simply to
    > > > set a page flag (DebugSlab()) if you know in alloc_slab that the slab
    > > > should be only used for emergency allocation. If DebugSlab is set then the
    > > > fastpath will not be called. You can trap all allocation attempts and
    > > > insert whatever fancy logic you want in the debug path since its not
    > > > performance critical.
    > >
    > > I might have missed some detail when I looked at SLUB, but I did not see
    > > how setting SlabDebug would trap subsequent allocations to that slab.
    > Ok its not evident in slab_alloc. But if SlabDebug is set then
    > page->lockless_list is always NULL and we always fall back to
    > __slab_alloc.

    Ah, indeed, that is the detail I missed. Yes that would work out.

    > There we check for SlabDebug and go to the debug: label.
    > There you can insert any fancy processing you want.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2007-05-14 22:15    [W:0.021 / U:14.184 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site