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sync: dump sync state to console on timeout

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Change-Id: I74bca6b4a2afa7ed5b1f5233c5165d2edddf269a
Signed-off-by: Erik Gilling <konkers@android.com>
This commit is contained in:
Erik Gilling
2012-08-24 13:48:57 -07:00
committed by 黄涛
parent 5d1bc19902
commit d3a7d79571
1 changed files with 32 additions and 2 deletions
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34
drivers/base/sync.c
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@@ -31,6 +31,7 @@
static void sync_fence_signal_pt(struct sync_pt *pt);
static int _sync_pt_has_signaled(struct sync_pt *pt);
static void sync_fence_free(struct kref *kref);
static void sync_dump(void);
static LIST_HEAD(sync_timeline_list_head);
static DEFINE_SPINLOCK(sync_timeline_list_lock);
@@ -573,8 +574,10 @@ int sync_fence_wait(struct sync_fence *fence, long timeout)
if (fence->status < 0)
return fence->status;
if (fence->status == 0)
if (fence->status == 0) {
sync_dump();
return -ETIME;
}
return 0;
}
@@ -914,7 +917,34 @@ static __init int sync_debugfs_init(void)
debugfs_create_file("sync", S_IRUGO, NULL, NULL, &sync_debugfs_fops);
return 0;
}
late_initcall(sync_debugfs_init);
#define DUMP_CHUNK 256
static char sync_dump_buf[64 * 1024];
void sync_dump(void)
{
struct seq_file s = {
.buf = sync_dump_buf,
.size = sizeof(sync_dump_buf) - 1,
};
int i;
sync_debugfs_show(&s, NULL);
for (i = 0; i < s.count; i += DUMP_CHUNK) {
if ((s.count - i) > DUMP_CHUNK) {
char c = s.buf[i + DUMP_CHUNK];
s.buf[i + DUMP_CHUNK] = 0;
pr_cont("%s", s.buf + i);
s.buf[i + DUMP_CHUNK] = c;
} else {
s.buf[s.count] = 0;
pr_cont("%s", s.buf + i);
}
}
}
#else
static void sync_dump(void)
{
}
#endif