Messages in this thread Patch in this message | | | Date | Tue, 13 Mar 2012 22:27:03 -0400 | From | Steven Rostedt <> | Subject | [PATCH RT 5/7] fs: namespace: Use cpu_chill() instead of cpu_relax() |
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From: Thomas Gleixner <tglx@linutronix.de>
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 Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- fs/namespace.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/fs/namespace.c b/fs/namespace.c index c563781..3270cde 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(); } /* -- 1.7.8.3
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