CUREENT issue with ballon.c

[Roger Pau Monné]

On 24/10/13 13:01, Outback Dingo wrote:
> 
> 
> On Thu, Oct 24, 2013 at 6:16 AM, Roger Pau Monné <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?