Re: [PATCH 1/2] md: factor out a helper exceed_read_errors() to check read_errors

[Li Nan]

在 2023/12/9 2:38, Song Liu 写道:
> On Sun, Dec 3, 2023 at 11:04 PM <linan666@xxxxxxxxxxxxxxx> wrote:
> > From: Li Nan <linan122@xxxxxxxxxx>
> >
> > Move check_decay_read_errors() to raid1-10.c and factor out a helper
> > exceed_read_errors() to check if read_errors exceeds the limit, so that
> > raid1 can also use it. There are no functional changes.
> >
> > Signed-off-by: Li Nan <linan122@xxxxxxxxxx>
> [...]
> > +static inline bool exceed_read_errors(struct mddev *mddev, struct md_rdev *rdev)
> > +{
> > +       int max_read_errors = atomic_read(&mddev->max_corr_read_errors);
> > +       int read_errors;
> > +
> > +       check_decay_read_errors(mddev, rdev);
> > +       read_errors =  atomic_inc_return(&rdev->read_errors);
> > +       if (read_errors > max_read_errors) {
> > +               pr_notice("md:%s: %pg: Raid device exceeded read_error threshold [cur %d:max %d]\n",
> > +                         mdname(mddev), rdev->bdev, read_errors, max_read_errors);
> > +               pr_notice("md:%s: %pg: Failing raid device\n",
> > +                         mdname(mddev), rdev->bdev);
>
> This changed the print message from "md/raid10:" to "md:". We should
> try to avoid
> such changes. How about we do something like the following?
>
> Thanks,
> Song
>
> diff --git i/drivers/md/raid1-10.c w/drivers/md/raid1-10.c
> index 3f22edec70e7..6c0ef0fe6ba7 100644
> --- i/drivers/md/raid1-10.c
> +++ w/drivers/md/raid1-10.c
> @@ -173,3 +173,10 @@ static inline void
> raid1_prepare_flush_writes(struct bitmap *bitmap)
>          else
>                  md_bitmap_unplug(bitmap);
>   }
> +
> +static inline bool exceed_read_errors(struct mddev *mddev, struct
> md_rdev *rdev)
> +{
> +       pr_notice("md/" RAID_1_10_NAME ":%s: %pg: Raid device ...\n",
> +                 ...);
> +       ...
> +}
> diff --git i/drivers/md/raid1.c w/drivers/md/raid1.c
> index 9348f1709512..412e98d02a05 100644
> --- i/drivers/md/raid1.c
> +++ w/drivers/md/raid1.c
> @@ -49,6 +49,7 @@ static void lower_barrier(struct r1conf *conf,
> sector_t sector_nr);
>   #define raid1_log(md, fmt, args...)                            \
>          do { if ((md)->queue) blk_add_trace_msg((md)->queue, "raid1 "
> fmt, ##args); } while (0)
>
> +#define RAID_1_10_NAME "raid1"
>   #include "raid1-10.c"
>
>   #define START(node) ((node)->start)
> diff --git i/drivers/md/raid10.c w/drivers/md/raid10.c
> index 375c11d6159f..a1531b5f15e3 100644
> --- i/drivers/md/raid10.c
> +++ w/drivers/md/raid10.c
> @@ -77,6 +77,8 @@ static void end_reshape(struct r10conf *conf);
>   #define raid10_log(md, fmt, args...)                           \
>          do { if ((md)->queue) blk_add_trace_msg((md)->queue, "raid10 "
> fmt, ##args); } while (0)
>
> +#define RAID_1_10_NAME "raid10"
> +
>   #include "raid1-10.c"
>
>   #define NULL_CMD
>
> [...]
>
> .

I agree. Let me improve this in v2.


--
Thanks,
Nan