File xfs_repair-add-prefetch-trace-calls-to-debug-th... of Package xfsprogs

Overview Repositories Revisions Requests Users Attributes Meta

File xfs_repair-add-prefetch-trace-calls-to-debug-thread-creation-failures.patch of Package xfsprogs (Revision c9db378967d8e638ab95e04615490681)

Currently displaying revision c9db378967d8e638ab95e04615490681 , Show latest

From: Jeff Mahoney <jeffm@suse.com>
Subject: xfs_repair: add prefetch trace calls to debug thread creation failures
Patch-mainline: Submitted, 16 Jan 2017
References: bsc#1019938

When debugging prefetch failures, it's useful to have thread creation
failure messages that are output as warnings on stderr in the trace
log as well.  It's also helpful to see when an AG gets queued behind
another one rather than having the thread started directly, which
has a separate trace line.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
---
 repair/prefetch.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/repair/prefetch.c b/repair/prefetch.c
index 044fab2..37d60d6 100644
--- a/repair/prefetch.c
+++ b/repair/prefetch.c
@@ -703,6 +703,8 @@ pf_queuing_worker(
 		if (err != 0) {
 			do_warn(_("failed to create prefetch thread: %s\n"),
 				strerror(err));
+			pftrace("failed to create prefetch thread for AG %d: %s",
+				args->agno, strerror(err));
 			args->io_threads[i] = 0;
 			if (i == 0) {
 				pf_start_processing(args);
@@ -817,6 +819,8 @@ pf_create_prefetch_thread(
 	if (err != 0) {
 		do_warn(_("failed to create prefetch thread: %s\n"),
 			strerror(err));
+		pftrace("failed to create prefetch thread for AG %d: %s",
+			args->agno, strerror(err));
 		args->queuing_thread = 0;
 		cleanup_inode_prefetch(args);
 	}
@@ -882,8 +886,11 @@ start_inode_prefetch(
 		if (prev_args->prefetch_done) {
 			if (!pf_create_prefetch_thread(args))
 				args = NULL;
-		} else
+		} else {
 			prev_args->next_args = args;
+			pftrace("queued AG %d after AG %d",
+				args->agno, prev_args->agno);
+		}
 		pthread_mutex_unlock(&prev_args->lock);
 	}
 
-- 
2.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-xfs" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Places

File xfs_repair-add-prefetch-trace-calls-to-debug-thread-creation-failures.patch of Package xfsprogs (Revision c9db378967d8e638ab95e04615490681)

Places