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    SubjectRe: [Bug #14252] WARNING: at include/linux/skbuff.h:1382 w/ e1000
    On Mon, 12 Oct 2009 03:49:19 -0700 (PDT)
    David Miller <davem@davemloft.net> wrote:

    > From: "Rafael J. Wysocki" <rjw@sisk.pl>
    > Date: Mon, 12 Oct 2009 01:01:06 +0200 (CEST)
    >
    > > This message has been generated automatically as a part of a report
    > > of regressions introduced between 2.6.30 and 2.6.31.
    > >
    > > The following bug entry is on the current list of known regressions
    > > introduced between 2.6.30 and 2.6.31. Please verify if it still should
    > > be listed and let me know (either way).
    > >
    > >
    > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14252
    > > Subject : WARNING: at include/linux/skbuff.h:1382 w/ e1000
    > > Submitter : Stephan von Krawczynski <skraw@ithnet.com>
    > > Date : 2009-09-20 11:26 (22 days old)
    > > References : http://marc.info/?l=linux-kernel&m=125344599006033&w=4
    >
    > Hmmm... e1000 calls skb_trim() on both jumbo and non-jumbo ring
    > buffers which get recycled.
    >
    > At least for the Jumbo case, that's illegal as you cannot call
    > skb_trim() on an SKB with paged data.
    >
    > But this assertion is triggering for the non-jumbo ring where
    > only linear packets should be present as far as I can tell.
    >
    > Some Intel folks need to take a look, CC:'d, and people need
    > to CC: their networking bug reports to netdev@vger.kernel.org
    > so that the proper folks see it.
    >
    > Thanks.

    Really, this was a lucky catch, because most of the time the box goes dead right away.
    Don't interpret "most of the time" as "continously every day". It just happens sometimes. I am not that surprised because it's a box on the "frontline", you can find a lot of trash going on there, like:

    Oct 12 12:21:01 box kernel: TCP: Peer 217.231.204.133:61124/80 unexpectedly shrunk window 2348821413:2348838837 (repaired)
    Oct 12 12:21:02 box kernel: TCP: Peer 217.231.204.133:61124/80 unexpectedly shrunk window 2348821413:2348838837 (repaired)

    --
    Regards,
    Stephan



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