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* [PATCH] md/raid1: add error handling of read error from FailFast device
@ 2018-05-02 11:08 Gioh Kim
  2018-05-02 12:11 ` Gi-Oh Kim
  2018-05-14 19:30 ` Shaohua Li
  0 siblings, 2 replies; 5+ messages in thread
From: Gioh Kim @ 2018-05-02 11:08 UTC (permalink / raw)
  To: shli; +Cc: linux-raid, linux-kernel, Gioh Kim

Current handle_read_error() function calls fix_read_error()
only if md device is RW and rdev does not include FailFast flag.
It does not handle a read error from a RW device including
FailFast flag.

I am not sure it is intended. But I found that write IO error
sets rdev faulty. The md module should handle the read IO error and
write IO error equally. So I think read IO error should set rdev faulty.

Signed-off-by: Gioh Kim <gi-oh.kim@profitbricks.com>
---
 drivers/md/raid1.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index e9e3308cb0a7..4445179aa4c8 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2474,6 +2474,8 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
 		fix_read_error(conf, r1_bio->read_disk,
 			       r1_bio->sector, r1_bio->sectors);
 		unfreeze_array(conf);
+	} else if (mddev->ro == 0 && test_bit(FailFast, &rdev->flags)) {
+		md_error(mddev, rdev);
 	} else {
 		r1_bio->bios[r1_bio->read_disk] = IO_BLOCKED;
 	}
-- 
2.14.1

^ permalink raw reply	[flat|nested] 5+ messages in thread
* Re: [PATCH] md/raid1: add error handling of read error from FailFast device
@ 2018-05-14  8:24 Jinpu Wang
  0 siblings, 0 replies; 5+ messages in thread
From: Jinpu Wang @ 2018-05-14  8:24 UTC (permalink / raw)
  To: Shaohua Li; +Cc: Gi-Oh Kim, linux-raid, linux-kernel

On Wed, May 9, 2018 at 10:58 AM, Jack Wang <jack.wang.usish@gmail.com> wrote:
> ---------- Forwarded message ----------
> From: Gioh Kim <gi-oh.kim@profitbricks.com>
> Date: 2018-05-02 13:08 GMT+02:00
> Subject: [PATCH] md/raid1: add error handling of read error from FailFast device
> To: shli@kernel.org
> 抄送: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, Gioh Kim
> <gi-oh.kim@profitbricks.com>
>
>
> Current handle_read_error() function calls fix_read_error()
> only if md device is RW and rdev does not include FailFast flag.
> It does not handle a read error from a RW device including
> FailFast flag.
>
> I am not sure it is intended. But I found that write IO error
> sets rdev faulty. The md module should handle the read IO error and
> write IO error equally. So I think read IO error should set rdev faulty.
>
> Signed-off-by: Gioh Kim <gi-oh.kim@profitbricks.com>
> ---
>  drivers/md/raid1.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
> index e9e3308cb0a7..4445179aa4c8 100644
> --- a/drivers/md/raid1.c
> +++ b/drivers/md/raid1.c
> @@ -2474,6 +2474,8 @@ static void handle_read_error(struct r1conf
> *conf, struct r1bio *r1_bio)
>                 fix_read_error(conf, r1_bio->read_disk,
>                                r1_bio->sector, r1_bio->sectors);
>                 unfreeze_array(conf);
> +       } else if (mddev->ro == 0 && test_bit(FailFast, &rdev->flags)) {
> +               md_error(mddev, rdev);
>         } else {
>                 r1_bio->bios[r1_bio->read_disk] = IO_BLOCKED;
>         }
> --
> 2.14.1

Patch looks good to me!
Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com>
-- 
Jack Wang
Linux Kernel Developer

ProfitBricks GmbH
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^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2018-05-14 19:30 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-05-02 11:08 [PATCH] md/raid1: add error handling of read error from FailFast device Gioh Kim
2018-05-02 12:11 ` Gi-Oh Kim
2018-05-04  8:38   ` Gi-Oh Kim
2018-05-14 19:30 ` Shaohua Li
2018-05-14  8:24 Jinpu Wang

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