On Thursday 24 October 2013 23:17:59 Roger Pau Monné wrote:
On 24/10/13 22:15, Konstantin Belousov wrote:
On Thu, Oct 24, 2013 at 09:45:20PM +0100, Roger Pau Monn? wrote:
On 24/10/13 13:01, Outback Dingo wrote:
On Thu, Oct 24, 2013 at 6:16 AM, Roger Pau Monn?
roger@citrix.com
mailto:roger@citrix.com wrote:
On 24/10/13 03:02, Outback Dingo wrote:
--- trap 0, rip = 0, rsp = 0xfe2c6b70, rbp = 0 ---
uma_zalloc_arg: zone 16 with the following non-sleepable locks
held:
exclusive sleep mutex balloon_lock (balloon_lock) r = 0
(0x816e9c58) locked @
/usr/src/sys/dev/xen/balloon/balloon.c:339
exclusive sleep mutex balloon_mutex (balloon_mutex) r = 0
(0x816e9c38) locked @
/usr/src/sys/dev/xen/balloon/balloon.c:373
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfe2c67c0
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfe2c6870
witness_warn() at witness_warn+0x4a8/frame 0xfe2c6930
uma_zalloc_arg() at uma_zalloc_arg+0x3b/frame 0xfe2c69a0
malloc() at malloc+0x101/frame 0xfe2c69f0
balloon_process() at balloon_process+0x44a/frame
0xfe2c6a70
fork_exit() at fork_exit+0x84/frame 0xfe2c6ab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfe2c6ab0
--- trap 0, rip = 0, rsp = 0xfe2c6b70, rbp = 0 ---
uma_zalloc_arg: zone 16 with the following non-sleepable locks
held:
exclusive sleep mutex balloon_lock (balloon_lock) r = 0
(0x816e9c58) locked @
/usr/src/sys/dev/xen/balloon/balloon.c:339
exclusive sleep mutex balloon_mutex (balloon_mutex) r = 0
(0x816e9c38) locked @
/usr/src/sys/dev/xen/balloon/balloon.c:373
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfe2c67c0
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfe2c6870
witness_warn() at witness_warn+0x4a8/frame 0xfe2c6930
uma_zalloc_arg() at uma_zalloc_arg+0x3b/frame 0xfe2c69a0
malloc() at malloc+0x101/frame 0xfe2c69f0
balloon_process() at balloon_process+0x44a/frame
0xfe2c6a70
fork_exit() at fork_exit+0x84/frame 0xfe2c6ab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfe2c6ab0
--- trap 0, rip = 0, rsp = 0xfe2c6b70, rbp = 0 ---
uma_zalloc_arg: zone 16 with the following non-sleepable locks
held:
Did you do anything specific to trigger the crash? Can you explain
the
steps needed to reproduce it?
just recompiled a kernel, and booted it scrolls continuously across the
screen
doesnt seem to ever stop.
I've tried r257051 and it seems to work fine, could you please post your
Xen version, the config file used to launch the VM and the toolstack
used?
Do you have witness enabled in your kernel config ?
Yes, but I'm not touching balloon memory target.
There is an obvious case of calling malloc(M_WAITOK) while holding both
balloon_lock and balloon_mutex:
ballon_process-decrease_reservation-balloon_append.
Yes, I'm aware of that, it's just that it shouldn't happen unless you
actually trigger a balloon memory decrease, which should not happen
automatically AFAIK, that's why I was asking if this was happening
without the user specifically requesting it.
For me this problem appears when I try to migrate VM to another physical
XenServer 6.2. And only when this VM configured with dynamical memory. Have
no problem with static memory configuration.
You can find details here
http://support.citrix.com/proddocs/topic/xencenter-61/xs-xc-dmc-about.html
Anyway, this should be clearly fixed and pulled into 10 no matter what
triggered it. I will send a patch as soon as possible.
Thanks for that.
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--
Best Regards,
Nasonov Sergey
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