Commit-ID: 83ebe63ead0fe60e4b548730800cb68293ce098b
Gitweb: http://git.kernel.org/tip/83ebe63ead0fe60e4b548730800cb68293ce098b
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Thu, 6 Mar 2014 11:09:10 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue, 29 Apr 2014 08:43:26 -0700
rcu: Print negatives for stall-warning counter wraparound
The print_other_cpu_stall() and print_cpu_stall() functions print
grace-period numbers using an unsigned format, which means that the number
one less than zero is a very large number. This commit therefore causes
these numbers to be printed with a signed format in order to improve
readability of the RCU CPU stall-warning output.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
kernel/rcu/tree.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 2c53ac9..b33c29a 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -932,9 +932,9 @@ static void print_other_cpu_stall(struct rcu_state *rsp)
print_cpu_stall_info_end();
for_each_possible_cpu(cpu)
totqlen += per_cpu_ptr(rsp->rda, cpu)->qlen;
- pr_cont("(detected by %d, t=%ld jiffies, g=%lu, c=%lu, q=%lu)\n",
+ pr_cont("(detected by %d, t=%ld jiffies, g=%ld, c=%ld, q=%lu)\n",
smp_processor_id(), (long)(jiffies - rsp->gp_start),
- rsp->gpnum, rsp->completed, totqlen);
+ (long)rsp->gpnum, (long)rsp->completed, totqlen);
if (ndetected == 0)
pr_err("INFO: Stall ended before state dump start\n");
else if (!trigger_all_cpu_backtrace())
@@ -971,8 +971,9 @@ static void print_cpu_stall(struct rcu_state *rsp)
print_cpu_stall_info_end();
for_each_possible_cpu(cpu)
totqlen += per_cpu_ptr(rsp->rda, cpu)->qlen;
- pr_cont(" (t=%lu jiffies g=%lu c=%lu q=%lu)\n",
- jiffies - rsp->gp_start, rsp->gpnum, rsp->completed, totqlen);
+ pr_cont(" (t=%lu jiffies g=%ld c=%ld q=%lu)\n",
+ jiffies - rsp->gp_start,
+ (long)rsp->gpnum, (long)rsp->completed, totqlen);
if (!trigger_all_cpu_backtrace())
dump_stack();
--
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