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[Xen-devel] blkback stuck in infinite loop in xen_blkbk_discard()

To: Li Dongyang <lidongyang@xxxxxxxxxx>
Subject: [Xen-devel] blkback stuck in infinite loop in xen_blkbk_discard()
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 28 Sep 2011 14:40:33 -0700
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
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I just "xl destroy"d a domain, and now my dom0 kernel is sitting there
infinitely spewing:

vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type
vbd vbd-83-51712: 5 reading type

which seems to be coming from the error case in
drivers/block/xen-blkback/xenbus.c:xen_blkbk_discard().

I don't know what the backtrace is.  The system seems overall fine,
despite the console spew, though I have a pile of dying domains sitting
in odd states rather than being cleaned up.

    J

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