From: Qu Wenruo <wqu@suse.com>
Date: Tue, 18 Jun 2019 05:39:38 +0000 (+0800)
Subject: dm log writes: fix incorrect comment about the logged sequence example
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=7537dad791cdbaf856c05f9dd977556ccd830ef0;p=openwrt%2Fstaging%2Fblogic.git

dm log writes: fix incorrect comment about the logged sequence example

dm-log-writes records the sequence of completion, not submission, thus
for the following sequence (W=write, C=complete):

  Wa,Wb,Wc,Cc,Ca,FLUSH,FUAd,Cb,CFLUSH,CFUAd

The logged results in log device should be:
  c,a,b,flush,fua

Fix the comment to give a better example.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index 0837b17e1798..99721c76225d 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -40,7 +40,7 @@
  *
  * Would result in the log looking like this:
  *
- * c,a,flush,fuad,b,<other writes>,<next flush>
+ * c,a,b,flush,fuad,<other writes>,<next flush>
  *
  * This is meant to help expose problems where file systems do not properly wait
  * on data being written before invoking a FLUSH.  FUA bypasses cache so once it