linux-kernel - Re: [PATCH RESEND] md: allow to set the fail

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Message-ID: <CALTww28b0HGzSTTNGVzeZdRp0nGMDAyY8sQ+cBsSCuYJ4jMaqw@mail.gmail.com>
Date:   Mon, 11 Oct 2021 15:49:45 +0800
From:   Xiao Ni <xni@...hat.com>
To:     Song Liu <song@...nel.org>
Cc:     Li Feng <fengli@...rtx.com>,
        "open list:SOFTWARE RAID (Multiple Disks) SUPPORT" 
        <linux-raid@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RESEND] md: allow to set the fail_fast on RAID1/RAID10

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 <song@...nel.org> wrote:
>
> On Thu, Oct 7, 2021 at 8:22 PM Li Feng <fengli@...rtx.com> wrote:
> >
> > 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 <fengli@...rtx.com>
>
> Thanks for the patch! I applied it to md-next, with some changes in the
> commit log.
>
> Thanks,
> Song
>