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| author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-07 21:00:34 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@rostedt.homelinux.com> | 2013-05-20 13:46:56 -0400 |
| commit | c721c44b43ee1d8d816b662b59844bff0b2ab1c8 (patch) | |
| tree | 1a363123f07264bea19d258a6219557f68da2749 /fs/namespace.c | |
| parent | c3c4dc56e9ed96b0dffaf692d888cd76db3ccf73 (diff) | |
| download | linux-rt-c721c44b43ee1d8d816b662b59844bff0b2ab1c8.tar.gz | |
fs: dcache: Use cpu_chill() in trylock loops
Retry loops on RT might loop forever when the modifying side was
preempted. Use cpu_chill() instead of cpu_relax() to let the system
make progress.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable-rt@vger.kernel.org
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 644dbde12d38..c45da77903a7 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -31,6 +31,7 @@ #include <linux/idr.h> #include <linux/fs_struct.h> #include <linux/fsnotify.h> +#include <linux/delay.h> #include <asm/uaccess.h> #include <asm/unistd.h> #include "pnode.h" @@ -346,7 +347,7 @@ int mnt_want_write(struct vfsmount *mnt) */ while (mnt->mnt_flags & MNT_WRITE_HOLD) { preempt_enable(); - cpu_relax(); + cpu_chill(); preempt_disable(); } /* |