Re: port-xen/48125: dom0 panic during domU creation attempt

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR port-xen/48125; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: port-xen-maintainer%netbsd.org@localhost,
    Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Subject: Re: port-xen/48125: dom0 panic during domU creation attempt
Date: Mon, 9 Sep 2013 23:51:08 +0300

 Manuel Bouyer wrote:
 >  Maybe log can be an issue here. Can you check without -o log ?
 
 I have now done a virtual-to-physical migration of the production domU
 that was running on the same server, turned off the log option in the
 dom0 /etc/fstab, and rebooted, and I can reliably reproduce the panic
 by running "xl create" and "xl destroy" a few times in a loop.
 
 Unedited console output follows.
 
 gusto# mount
 /dev/wd0a on / type ffs (local)
 kernfs on /kern type kernfs (local)
 ptyfs on /dev/pts type ptyfs (local)
 procfs on /proc type procfs (local)
 tmpfs on /tmp type tmpfs (local)
 gusto# set -x
 gusto# while true; do xl create -c /usr/pkg/etc/xen/bloute; xl destroy bloute; 
sleep 5; done
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:49:58 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/1/0/script (No such file or directory)
 Sep  9 20:50:03 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/1/script (No such file or directory)
 Daemon running with PID 97
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:50:09 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/2/51712/script (No such file or directory)
 Sep  9 20:50:09 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/2/0/script (No such file or directory)
 Sep  9 20:50:14 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/2/script (No such file or directory)
 Daemon running with PID 600
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:50:20 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/3/51712/script (No such file or directory)
 Sep  9 20:50:20 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/3/0/script (No such file or directory)
 Sep  9 20:50:25 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/3/script (No such file or directory)
 Daemon running with PID 299
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:50:32 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/4/51712/script (No such file or directory)
 Sep  9 20:50:32 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/4/0/script (No such file or directory)
 Sep  9 20:50:37 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/4/script (No such file or directory)
 Daemon running with PID 233
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:50:43 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/5/51712/script (No such file or directory)
 Sep  9 20:50:43 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/5/0/script (No such file or directory)
 Sep  9 20:50:48 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/5/script (No such file or directory)
 Daemon running with PID 848
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:50:54 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/6/51712/script (No such file or directory)
 Sep  9 20:50:54 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/6/0/script (No such file or directory)
 Sep  9 20:50:59 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/6/script (No such file or directory)
 Daemon running with PID 258
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:51:05 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/7/51712/script (No such file or directory)
 Sep  9 20:51:05 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/7/0/script (No such file or directory)
 Sep  9 20:51:10 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/7/script (No such file or directory)
 Daemon running with PID 730
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:51:17 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/8/51712/script (No such file or directory)
 Sep  9 20:51:17 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/8/0/script (No such file or directory)
 Sep  9 20:51:22 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/8/script (No such file or directory)
 Daemon running with PID 1541
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:51:28 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/9/51712/script (No such file or directory)
 Sep  9 20:51:28 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/9/0/script (No such file or directory)
 Sep  9 20:51:33 gusto xenbackendd[220]: Failed to read 
/local/domain/0/device-model/9/script (No such file or directory)
 Daemon running with PID 572
 xenconsole: Could not read tty from store: No such file or directory
 + xl destroy bloute
 + sleep 5
 + true
 + xl create -c /usr/pkg/etc/xen/bloute
 Parsing config file /usr/pkg/etc/xen/bloute
 Sep  9 20:51:39 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/qdisk/10/51712/script (No such file or directory)
 Sep  9 20:51:39 gusto xenbackendd[220]: Failed to read 
/local/domain/0/backend/console/10/0/script (No such file or directory)
 uvm_fault(0xffffa00005469768, 0x0, 1) -> e
 fatal page fault in supervisor mode
 trap type 6 code 0 rip ffffffff806d0b68 cs e030 rflags 10246 cr2  8 cpl 0 rsp 
ffffa0005c178a20
 panic: trap
 cpu0: Begin traceback...
 printf_nolog() at netbsd:printf_nolog
 startlwp() at netbsd:startlwp
 alltraps() at netbsd:alltraps+0x9f
 kernfs_try_fileop() at netbsd:kernfs_try_fileop+0x64
 VOP_WRITE() at netbsd:VOP_WRITE+0x3c
 vn_write() at netbsd:vn_write+0xf9
 dofilewrite() at netbsd:dofilewrite+0x7d
 sys_write() at netbsd:sys_write+0x62
 syscall() at netbsd:syscall+0xc4
 cpu0: End traceback...
 
 dump to dev 0,1 not possible
 rebooting...
 (XEN) Domain 0 shutdown: rebooting machine.