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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2012-05-29 11:18:44 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-06 11:34:20 +0200 |
| commit | 8a173b1476d126674104c7c5c6cef0bcd824b001 (patch) | |
| tree | 788d4c8a018ee939f7b7fcbb782a23259e274d2c /lib | |
| parent | c7f5f4ab10ce4e05b9f8877f1fd112faba71f175 (diff) | |
| download | lwn-8a173b1476d126674104c7c5c6cef0bcd824b001.tar.gz lwn-8a173b1476d126674104c7c5c6cef0bcd824b001.zip | |
spinlock: Indicate that a lockup is only suspected
On an over-committed KVM system we got a:
"BUG: spinlock lockup on CPU#2, swapper/2/0"
message on the heavily contended virtio blk spinlock.
While we might want to reconsider the locking of virtio-blk
(lock is held while switching to the host) this patch tries to
make the message clearer: the lockup is only suspected.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1338283124-7063-1-git-send-email-borntraeger@de.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/spinlock_debug.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c index d0ec4f3d1593..e91fbc23fff1 100644 --- a/lib/spinlock_debug.c +++ b/lib/spinlock_debug.c @@ -118,7 +118,7 @@ static void __spin_lock_debug(raw_spinlock_t *lock) /* lockup suspected: */ if (print_once) { print_once = 0; - spin_dump(lock, "lockup"); + spin_dump(lock, "lockup suspected"); #ifdef CONFIG_SMP trigger_all_cpu_backtrace(); #endif |