CUREENT issue with ballon.c

Roger Pau Monné roger.pau at citrix.com
Thu Oct 24 10:16:42 UTC 2013


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?



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