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    SubjectRe: lockups shortly after booting in current git.
    On Thu, Mar 29, 2012 at 11:36:49AM -0700, Linus Torvalds wrote:
    > On Thu, Mar 29, 2012 at 11:26 AM, Dave Jones <davej@redhat.com> wrote:
    > > On Thu, Mar 29, 2012 at 09:03:31AM -0700, Linus Torvalds wrote:
    > >  > Can you do sysrq-w (or whatever it is that does only the D-state
    > >  > processes)? That might give the more relevant process information without
    > >  > everything else making it unreadable...
    > >
    > > http://codemonkey.org.uk/junk/process-trace2.txt
    >
    > Ok, this doesn't look all that different, but now it's not truncated
    > any more because the random "waits for children or poll" cases are
    > gone.
    >
    > It's still basically all blocked on the ext4 journal. All writes as
    > far as I can see.
    >
    > That said, there's that odd kworker/1:2 there that seems to be
    > constantly running. Can you get the EIP for that one (several times)
    > by doing sysrq-p (or maybe sysrq-l is better - that should give the
    > stack trace too).

    Took a while to reproduce that time (but now I have a theory, going
    to try and reproduce that after sending this mail).

    sysrq-p looks kinda boring. I couldn't get sysrq-l to coincide
    with kworker running.

    http://codemonkey.org.uk/junk/process-trace3.txt

    Dave

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