From: Ian Campbell <Ian.Campbell@citrix.com>
To: Balbir Singh <bsingharora@gmail.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: Frozen dom0 xl commands
Date: Wed, 10 Dec 2014 13:55:59 +0000 [thread overview]
Message-ID: <1418219759.3505.56.camel@citrix.com> (raw)
In-Reply-To: <CAKTCnznScui38+ec50U0dkCvWK2jA4cHEmqgaf1USj23k6CE5g@mail.gmail.com>
On Wed, 2014-12-10 at 19:24 +0530, Balbir Singh wrote:
> I've been facing an issue on my Ubuntu box (acting as dom0) with
> xen-4.5 (HEAD). I am running dom0 3.13.0.19-generic (ubuntu). When I
> try and xl command I see the command hangs, after a while I see the
> guest kernel complain. I've tried a similar setup on another setup and
> I see the same issue. Any clues on how to debug?
>
> FYI: xl dmesg does not show much. I've tried using the console
> debugger, but not had much luck with it
Is xenstored running?
>
> [ 484.442137] xl D 0000000000000000 0 4590 4122 0x00000004
> [ 484.442146] ffff88038cf87dd8 0000000000000202 ffff8800c458afe0
> ffff88038cf87fd8
> [ 484.442156] 0000000000014440 0000000000014440 ffff8800c458afe0
> ffffffff81fc0260
> [ 484.442164] ffff88038cf87e10 ffff8800c4130058 ffff8800c413004c
> ffff8800c4130000
> [ 484.442172] Call Trace:
> [ 484.442188] [<ffffffff817154b9>] schedule+0x29/0x70
> [ 484.442198] [<ffffffff81429c25>] read_reply+0x95/0x140
> [ 484.442210] [<ffffffff810a9a50>] ? prepare_to_wait_event+0x100/0x100
> [ 484.442218] [<ffffffff8142aa1c>] xenbus_dev_request_and_reply+0x8c/0xb0
> [ 484.442226] [<ffffffff8142d1ae>] xenbus_file_write+0x27e/0x540
> [ 484.442236] [<ffffffff811baea9>] ? __sb_start_write+0x49/0xe0
> [ 484.442246] [<ffffffff812cf1c3>] ? security_file_permission+0x23/0xa0
> [ 484.442253] [<ffffffff811b88c4>] vfs_write+0xb4/0x1f0
> [ 484.442261] [<ffffffff811b92f9>] SyS_write+0x49/0xa0
> [ 484.442269] [<ffffffff81721c7f>] tracesys+0xe1/0xe6
> [ 484.442276] INFO: task xl:4660 blocked for more than 120 seconds.
> [ 484.442280] Tainted: PF O 3.13.0-19-generic #40-Ubuntu
> [ 484.442283] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
> disables this message.
> [ 484.442286] xl D 0000000000000000 0 4660 4646 0x00000004
> [ 484.442291] ffff88038dc41dc0 0000000000000202 ffff88038e2797f0
> ffff88038dc41fd8
> [ 484.442300] 0000000000014440 0000000000014440 ffff88038e2797f0
> ffffffff81fc0290
> [ 484.442308] ffffffff81fc0294 ffff88038e2797f0 00000000ffffffff
> ffffffff81fc0298
> [ 484.442316] Call Trace:
> [ 484.442325] [<ffffffff817159d9>] schedule_preempt_disabled+0x29/0x70
> [ 484.442333] [<ffffffff81717845>] __mutex_lock_slowpath+0x135/0x1b0
> [ 484.442339] [<ffffffff817178df>] mutex_lock+0x1f/0x2f
> [ 484.442347] [<ffffffff8142a9b6>] xenbus_dev_request_and_reply+0x26/0xb0
> [ 484.442355] [<ffffffff8142d1ae>] xenbus_file_write+0x27e/0x540
> [ 484.442364] [<ffffffff811baea9>] ? __sb_start_write+0x49/0xe0
> [ 484.442371] [<ffffffff812cf1c3>] ? security_file_permission+0x23/0xa0
> [ 484.442378] [<ffffffff811b88c4>] vfs_write+0xb4/0x1f0
> [ 484.442386] [<ffffffff811b92f9>] SyS_write+0x49/0xa0
> [ 484.442393] [<ffffffff81721c7f>] tracesys+0xe1/0xe6
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2014-12-10 13:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-10 13:54 Frozen dom0 xl commands Balbir Singh
2014-12-10 13:55 ` Ian Campbell [this message]
2014-12-11 3:57 ` Balbir Singh
2014-12-11 11:32 ` Ian Campbell
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