Prev: [GIT PULL] SLAB fixes for 2.6.35-rc0
Next: Subject: [PATCH] net/ipv6: Use GFP_ATOMIC when a lock is held
From: Ingo Molnar on 30 May 2010 15:40
Linus,

Please pull the latest core-fixes-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git core-fixes-for-linus

Thanks,

Ingo

------------------>
Tony Breeds (1):
mutex: Fix optimistic spinning vs. BKL


kernel/mutex.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/kernel/mutex.c b/kernel/mutex.c
index 632f04c..4c0b7b3 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -172,6 +172,13 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
struct thread_info *owner;

/*
+ * If we own the BKL, then don't spin. The owner of
+ * the mutex might be waiting on us to release the BKL.
+ */
+ if (unlikely(current->lock_depth >= 0))
+ break;
+
+ /*
* If there's an owner, wait for it to either
* release the lock or go to sleep.
*/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [GIT PULL] SLAB fixes for 2.6.35-rc0
Next: Subject: [PATCH] net/ipv6: Use GFP_ATOMIC when a lock is held