From 0c6c987f3706fedff42eee5384c7ede8a910c4ed Mon Sep 17 00:00:00 2001 From: Nikolay Borisov Date: Tue, 9 Oct 2018 11:31:31 +0300 Subject: [PATCH] dm flakey: Document "error_writes" feature Commit ef548c551e72 ("dm flakey: introduce "error_writes" feature") added the ability to dm flakey to error out writes in contrast to silently dropping it with 'drop_writes'. Unfortunately this feature is not currently documented and one has to be either familiar with the source code of dm flakey or check out xfstests sources to know of this parameter. So document it. Signed-off-by: Nikolay Borisov Signed-off-by: Jonathan Corbet --- Documentation/device-mapper/dm-flakey.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/device-mapper/dm-flakey.txt b/Documentation/device-mapper/dm-flakey.txt index c43030718cef..9f0e247d0877 100644 --- a/Documentation/device-mapper/dm-flakey.txt +++ b/Documentation/device-mapper/dm-flakey.txt @@ -33,6 +33,10 @@ Optional feature parameters: All write I/O is silently ignored. Read I/O is handled correctly. + error_writes: + All write I/O is failed with an error signalled. + Read I/O is handled correctly. + corrupt_bio_byte : During , replace of the data of each matching bio with .