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[Xen-users] Re: [Xen-devel] blktap2 bug:Assertion 'list_empty(&vreq->nex

To: tsk <aixt2006@xxxxxxxxx>
Subject: [Xen-users] Re: [Xen-devel] blktap2 bug:Assertion 'list_empty(&vreq->next)' failed
From: Daniel Stodden <daniel.stodden@xxxxxxxxxx>
Date: Sun, 27 Jun 2010 21:49:19 -0700
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On Mon, 2010-06-28 at 00:41 -0400, tsk wrote:
> Hi folks,
> Yestoday, I run a testcase, 6 VMs restart every 10 minitues from 11:00
> am to 16:30 pm until Dom0 crashed.
> Assertion 'list_empty(&vreq->next)' failed will lead to tapdisk2
> process segfault, then Dom0 crashed!
> Jun 27 16:31:05 r02k05014 kernel: device tap775.0 entered promiscuous
> mode
> Jun 27 16:31:05 r02k05014 kernel: eth0: port 13(tap775.0) entering
> forwarding state
> Jun 27 16:31:15 r02k05014 tapdisk2[4341]: Assertion
> 'list_empty(&vreq->next)' failed, line 1822, file tapdisk-vbd.c
> Jun 27 16:31:15 r02k05014 kernel: tapdisk2[4341]: segfault at 0 ip
> 000000000040a24f sp 00007fff0d8acb70 error 6 in tapdisk2[400000+39000]
> Jun 28 18:58:09 r02k05014 syslogd 1.4.1: restart.
> Any one who can give me some tips?  

Semi-yes. Not entirely sure about the list_empty userland crasher, but
the kernel stuff was upstreamed with some minor exposed while unmapping
pending I/O. 

Which I didn't care yet to send patches for...

... Soon, real soon now...


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