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gettime: locking fix and debug check for identical sequence
author
Jens Axboe
<axboe@kernel.dk>
Mon, 17 Dec 2012 13:23:47 +0000
(14:23 +0100)
committer
Jens Axboe
<axboe@kernel.dk>
Mon, 17 Dec 2012 13:23:47 +0000
(14:23 +0100)
Signed-off-by: Jens Axboe <axboe@kernel.dk>
gettime.c
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diff --git
a/gettime.c
b/gettime.c
index bf35c7164007b16353a0b6faa4aaa196154155fe..0683bd1552093298b4a868e08ee1edf97ad80a62 100644
(file)
--- a/
gettime.c
+++ b/
gettime.c
@@
-388,8
+388,8
@@
static void *clock_thread_fn(void *data)
return (void *) 1;
}
- pthread_mutex_unlock(&t->started);
pthread_mutex_lock(&t->lock);
+ pthread_mutex_unlock(&t->started);
c = &t->entries[0];
for (i = 0; i < CLOCK_ENTRIES; i++, c++) {
@@
-414,6
+414,9
@@
static int clock_cmp(const void *p1, const void *p2)
const struct clock_entry *c1 = p1;
const struct clock_entry *c2 = p2;
+ if (c1->seq == c2->seq)
+ log_err("cs: bug in atomic sequence!\n");
+
return c1->seq - c2->seq;
}