HOWTO: mention some details of ignore_error= option

ignore_error= and continue_on_error= are related in their
implementation, and easier to understand how they differ by
mentioning to it.

Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/HOWTO b/HOWTO
index ea9466a8d0e79e5cc6315d8db5fa07654290066b..289c51808a142af3a18a61aa89078a3c1e372ac0 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -2836,7 +2836,8 @@ Error handling
 .. option:: ignore_error=str
 
        Sometimes you want to ignore some errors during test in that case you can
-       specify error list for each error type.
+       specify error list for each error type, instead of only being able to
+       ignore the default 'non-fatal error' using :option:`continue_on_error`.
        ``ignore_error=READ_ERR_LIST,WRITE_ERR_LIST,VERIFY_ERR_LIST`` errors for
        given error type is separated with ':'. Error may be symbol ('ENOSPC',
        'ENOMEM') or integer.  Example::
@@ -2844,7 +2845,8 @@ Error handling
                ignore_error=EAGAIN,ENOSPC:122
 
        This option will ignore EAGAIN from READ, and ENOSPC and 122(EDQUOT) from
-       WRITE.
+       WRITE. This option works by overriding :option:`continue_on_error` with
+       the list of errors for each error type if any.
 
 .. option:: error_dump=bool