Any update on accepting this patch ?
> On Jan 20, 2021, at 3:05 PM, Nigel Croxon <ncroxon@xxxxxxxxxx> wrote:
>
> Reshaping a 3-disk RAID5 to 4-disk RAID6 will cause a hang of
> the resync after the grow.
>
> Adding a spare disk to avoid degrading the array when growing
> is successful, but not successful when supplying a backup file
> on the command line. If the reshape job is not already running,
> set the sync_max value to max.
>
> Signed-off-by: Nigel Croxon <ncroxon@xxxxxxxxxx>
> ---
> Grow.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/Grow.c b/Grow.c
> index 6b8321c..5c2512f 100644
> --- a/Grow.c
> +++ b/Grow.c
> @@ -931,12 +931,15 @@ int start_reshape(struct mdinfo *sra, int already_running,
> err = err ?: sysfs_set_num(sra, NULL, "sync_max", sync_max_to_set);
> if (!already_running && err == 0) {
> int cnt = 5;
> + int err2;
> do {
> err = sysfs_set_str(sra, NULL, "sync_action",
> "reshape");
> - if (err)
> + err2 = sysfs_set_str(sra, NULL, "sync_max",
> + "max");
> + if (err || err2)
> sleep(1);
> - } while (err && errno == EBUSY && cnt-- > 0);
> + } while (err && err2 && errno == EBUSY && cnt-- > 0);
> }
> return err;
> }
> --
> 2.20.1
>
