Re: [PATCH] Btrfs: dev-replace: skip prealloc extents when copy nocow pages

[Filipe Manana <fdmanana@gmail.com>]

On Wed, Feb 28, 2018 at 1:10 AM, Liu Bo <bo.li.liu@oracle.com> wrote:
> It doens't make sense to process prealloc extents as pages will be
> filled with zero when reading prealloc extents.
>
> Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>

Makes sense.

> ---
>  fs/btrfs/scrub.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
> index ec56f33..9882513 100644
> --- a/fs/btrfs/scrub.c
> +++ b/fs/btrfs/scrub.c
> @@ -4480,7 +4480,8 @@ static int check_extent_to_block(struct btrfs_inode *inode, u64 start, u64 len,
>          * move on to the next inode.
>          */
>         if (em->block_start > logical ||
> -           em->block_start + em->block_len < logical + len) {
> +           em->block_start + em->block_len < logical + len ||
> +           test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
>                 free_extent_map(em);
>                 ret = 1;
>                 goto out_unlock;
> --
> 2.9.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html



-- 
Filipe David Manana,

“Whether you think you can, or you think you can't — you're right.”