From: Eugene Istomin <E.Istomin@edss.ee>
To: xen-devel <xen-devel@lists.xensource.com>
Subject: soft lockups of tapdisk2 process - xen 4.4, kernel 3.12.17
Date: Thu, 17 Apr 2014 08:11:25 +0300 [thread overview]
Message-ID: <3712937.BtoHIzAgQ3@evis> (raw)
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Hello,
after updating from xen 4.3 to xen 4.4 we have strange soft lockups, here
is log - https://gist.github.com/evis/10953677.[1]
We already disabled c-states in BIOS, kernel (processor.max_cstate=1
intel_idle.max_cstate=0), dom0 (xenpm set-max-cstate 1). An easy step to
reproduce in our environment - run 2 VMs with DRBD-backed disk.
What "blktap_run_deferred" in this trace mean and why dom0 needs to call
"blktap_device_restart"?
force_evtchn_callback+0xe/0x10
blktap_device_restart+0xdf/0xf0 [blktap2]
blktap_run_deferred+0xd1/0xe0 [blktap2]
blktap_ring_ioctl+0x3a5/0x4d0 [blktap2]
Thanks.
/---/
*/Best regards,/*
/Eugene Istomin/
--------
[1] https://gist.github.com/evis/10953677
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next reply other threads:[~2014-04-17 5:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-17 5:11 Eugene Istomin [this message]
2014-04-17 6:39 ` soft lockups of tapdisk2 process - xen 4.4, kernel 3.12.17 Eugene Istomin
2014-05-01 12:26 ` Eugene Istomin
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