Re: [V9fs-developer] Hang triggered by udev coldplug, looks like a race

From	Andy Lutomirski <luto@amacapital.net>
Newsgroups	linux.kernel
Subject	Re: [V9fs-developer] Hang triggered by udev coldplug, looks like a race
Date	2015-12-17 22:10 +0100
Message-ID	<qGNYe-4LR-17@gated-at.bofh.it> (permalink)
References	(3 earlier) <qDfT3-4w8-1@gated-at.bofh.it> <qDgm5-4Et-13@gated-at.bofh.it> <qDzf3-8k5-1@gated-at.bofh.it> <qDGqd-4EB-5@gated-at.bofh.it> <qDGJz-4OU-21@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Dec 8, 2015 at 10:45 PM, Al Viro <viro@zeniv.linux.org.uk> wrote:
> On Wed, Dec 09, 2015 at 07:23:16AM +0100, Dominique Martinet wrote:
>> Andy Lutomirski wrote on Tue, Dec 08, 2015:
>> > Trace attached.  I don't see anything wrong, but I also don't know
>> > what I'm looking for.
>>
>> Actually doesn't look good, not sure if trace could be missing messages
>> but it looks like tags get reused...
>>
>> Quick and dirty parse script (attached output, it doesn't handle TFLUSH
>> but there are none in his message):
>
> There's also not a single RCLUNK in there, which looks like missing packets.
> AFAICS, all (apparent) tag reuses caught by your awk script are of that nature.
> And all RERROR are plain "no such file" in response to TWALK; all those
> TCLUNK in there get no reply whatsoever - neither success nor failure...

This could be QEMU's analysis script screwing up.  Is there a good way
for me to gather more info?

--Andy
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Re: [V9fs-developer] Hang triggered by udev coldplug, looks like a race Andy Lutomirski <luto@amacapital.net> - 2015-12-17 22:10 +0100
  Re: [V9fs-developer] Hang triggered by udev coldplug, looks like a  race Dominique Martinet <dominique.martinet@cea.fr> - 2015-12-24 12:00 +0100
    Re: [V9fs-developer] Hang triggered by udev coldplug, looks like a race Andy Lutomirski <luto@amacapital.net> - 2015-12-30 07:50 +0100

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