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authorChristian Borntraeger <borntraeger@de.ibm.com>2012-05-29 11:18:44 +0200
committerIngo Molnar <mingo@kernel.org>2012-06-06 11:34:20 +0200
commit8a173b1476d126674104c7c5c6cef0bcd824b001 (patch)
tree788d4c8a018ee939f7b7fcbb782a23259e274d2c /lib
parentc7f5f4ab10ce4e05b9f8877f1fd112faba71f175 (diff)
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.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c
index d0ec4f3d159..e91fbc23fff 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