Hi all

Now the per device sysfs interface file state can change failfast. Do
we need a new file for failfast?

I did a test. The steps are:

mdadm -CR /dev/md0 -l1 -n2 /dev/sdb /dev/sdc --assume-clean
cd /sys/block/md0/md/dev-sdb
echo failfast > state
cat state
in_sync,failfast

Best Regards
Xiao

On Sat, Oct 9, 2021 at 7:36 AM Song Liu [off-list ref] wrote:

On Thu, Oct 7, 2021 at 8:22 PM Li Feng [off-list ref] wrote:

quoted

When the running RAID1/RAID10 need to be set with the fail_fast flag,
we have to remove each device from RAID and re-add it again with the
--fail_fast flag.

Export the fail_fast flag to the userspace to support the read and
write.

Signed-off-by: Li Feng <redacted>

Thanks for the patch! I applied it to md-next, with some changes in the
commit log.

Thanks,
Song