Messages in this thread Patch in this message |  | | | Date | Tue, 13 Mar 2012 22:27:04 -0400 | | From | Steven Rostedt <> | | Subject | [PATCH RT 6/7] net: 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> --- net/rds/ib_rdma.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c index 819c35a..256ad87 100644 --- a/net/rds/ib_rdma.c +++ b/net/rds/ib_rdma.c @@ -33,6 +33,7 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/rculist.h> +#include <linux/delay.h> #include "rds.h" #include "ib.h" @@ -294,7 +295,7 @@ static inline void wait_clean_list_grace(void) for_each_online_cpu(cpu) { flag = &per_cpu(clean_list_grace, cpu); while (test_bit(CLEAN_LIST_BUSY_BIT, flag)) - cpu_relax(); + cpu_chill(); } } -- 1.7.8.3
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