On Wed, Sep 16, 2020 at 07:38:58PM +0800, Ye Bin wrote:
> From: Jan Kara <jack@xxxxxxx>
>
> ext4_mb_discard_group_preallocations() can be releasing group lock with
> preallocations accumulated on its local list. Thus although
> discard_pa_seq was incremented and concurrent allocating processes will
> be retrying allocations, it can happen that premature ENOSPC error is
> returned because blocks used for preallocations are not available for
> reuse yet. Make sure we always free locally accumulated preallocations
> before releasing group lock.
>
> Fixes: 07b5b8e1ac40 ("ext4: mballoc: introduce pcpu seqcnt for freeing PA to improve ENOSPC handling")
> Signed-off-by: Jan Kara <jack@xxxxxxx>
> Signed-off-by: Ye Bin <yebin10@xxxxxxxxxx>
> Reviewed-by: Ritesh Harjani <riteshh@xxxxxxxxxxxxx>
Thanks, applied.
- Ted
