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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>
This commit is contained in:
Qu Wenruo 2019-06-18 13:39:38 +08:00 committed by Mike Snitzer
parent d4e6e83651
commit 7537dad791
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-log-writes.c
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@ -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