CUREENT issue with ballon.c
Konstantin Belousov
kostikbel at gmail.com
Thu Oct 24 21:15:40 UTC 2013
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.pau at citrix.com
> > <mailto:roger.pau at citrix.com>> wrote:
> >
> > On 24/10/13 03:02, Outback Dingo wrote:
> > > --- trap 0, rip = 0, rsp = 0xfffffe00002c6b70, rbp = 0 ---
> > > uma_zalloc_arg: zone "16" with the following non-sleepable locks held:
> > > exclusive sleep mutex balloon_lock (balloon_lock) r = 0
> > > (0xffffffff816e9c58) locked @
> > /usr/src/sys/dev/xen/balloon/balloon.c:339
> > > exclusive sleep mutex balloon_mutex (balloon_mutex) r = 0
> > > (0xffffffff816e9c38) locked @
> > /usr/src/sys/dev/xen/balloon/balloon.c:373
> > > KDB: stack backtrace:
> > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
> > > 0xfffffe00002c67c0
> > > kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe00002c6870
> > > witness_warn() at witness_warn+0x4a8/frame 0xfffffe00002c6930
> > > uma_zalloc_arg() at uma_zalloc_arg+0x3b/frame 0xfffffe00002c69a0
> > > malloc() at malloc+0x101/frame 0xfffffe00002c69f0
> > > balloon_process() at balloon_process+0x44a/frame 0xfffffe00002c6a70
> > > fork_exit() at fork_exit+0x84/frame 0xfffffe00002c6ab0
> > > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00002c6ab0
> > > --- trap 0, rip = 0, rsp = 0xfffffe00002c6b70, rbp = 0 ---
> > > uma_zalloc_arg: zone "16" with the following non-sleepable locks held:
> > > exclusive sleep mutex balloon_lock (balloon_lock) r = 0
> > > (0xffffffff816e9c58) locked @
> > /usr/src/sys/dev/xen/balloon/balloon.c:339
> > > exclusive sleep mutex balloon_mutex (balloon_mutex) r = 0
> > > (0xffffffff816e9c38) locked @
> > /usr/src/sys/dev/xen/balloon/balloon.c:373
> > > KDB: stack backtrace:
> > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
> > > 0xfffffe00002c67c0
> > > kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe00002c6870
> > > witness_warn() at witness_warn+0x4a8/frame 0xfffffe00002c6930
> > > uma_zalloc_arg() at uma_zalloc_arg+0x3b/frame 0xfffffe00002c69a0
> > > malloc() at malloc+0x101/frame 0xfffffe00002c69f0
> > > balloon_process() at balloon_process+0x44a/frame 0xfffffe00002c6a70
> > > fork_exit() at fork_exit+0x84/frame 0xfffffe00002c6ab0
> > > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00002c6ab0
> > > --- trap 0, rip = 0, rsp = 0xfffffe00002c6b70, 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 ?
There is an obvious case of calling malloc(M_WAITOK) while holding both
balloon_lock and balloon_mutex:
ballon_process->decrease_reservation->balloon_append.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 834 bytes
Desc: not available
URL: <http://lists.freebsd.org/pipermail/freebsd-current/attachments/20131025/a6b53220/attachment.sig>
More information about the freebsd-current
mailing list