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    SubjectRe: Feedback on preemptible kernel patch
    Date
    On September 9, 2001 11:37 pm, Robert Love wrote:
    > On Sun, 2001-09-09 at 17:23, Arjan Filius wrote:
    > > After my succes report i _do_ noticed something unusual:
    > >
    > > I'm not sure it's preempt related, but you wanted feedback :)
    > >
    > > Sep 9 23:08:02 sjoerd kernel: __alloc_pages: 0-order allocation failed (gfp=0x70/1).
    > > Sep 9 23:08:02 sjoerd last message repeated 93 times
    > > Sep 9 23:08:02 sjoerd kernel: cation failed (gfp=0x70/1).
    > > Sep 9 23:08:02 sjoerd kernel: __alloc_pages: 0-order allocation failed (gfp=0x70/1).
    > > Sep 9 23:08:02 sjoerd last message repeated 281 times
    > >
    > > This is at the very moment i make a ppp connection to internet, and
    > > get/set the time with netdate (for the first time after a reboot).
    > > I didn't see this a second time (yet).
    > >
    >
    > damn, I was exciting we had solved everything :)
    >
    > actually, I am not confident of what could cause these results. the
    > 2.4.10-pre is going through another set of changes it should not, and
    > one of them concerns exactly what you are reporting.

    This may not be your fault. It's a GFP_NOFS recursive allocation - this
    comes either from grow_buffers or ReiserFS, probably the former. In
    either case, it means we ran completely out of free pages, even though
    the caller is willing to wait. Hmm. It smells like a loophole in vm
    scanning.

    --
    Daniel
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