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SubjectRe: [PATCH 4/6] ext2 balloc: fix off-by-one against grp_goal
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On Tue, 2006-11-28 at 17:42 +0000, Hugh Dickins wrote:
> grp_goal 0 is a genuine goal (unlike -1),
> so ext2_try_to_allocate_with_rsv should treat it as such.
>
> Signed-off-by: Hugh Dickins <hugh@veritas.com>

Acked.

Thanks,

Mingming
> ---
>
> fs/ext2/balloc.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> --- 2.6.19-rc6-mm2/fs/ext2/balloc.c 2006-11-24 08:18:02.000000000 +0000
> +++ linux/fs/ext2/balloc.c 2006-11-27 19:28:41.000000000 +0000
> @@ -1053,7 +1053,7 @@ ext2_try_to_allocate_with_rsv(struct sup
> }
> /*
> * grp_goal is a group relative block number (if there is a goal)
> - * 0 < grp_goal < EXT2_BLOCKS_PER_GROUP(sb)
> + * 0 <= grp_goal < EXT2_BLOCKS_PER_GROUP(sb)
> * first block is a filesystem wide block number
> * first block is the block number of the first block in this group
> */
> @@ -1089,7 +1089,7 @@ ext2_try_to_allocate_with_rsv(struct sup
> if (!goal_in_my_reservation(&my_rsv->rsv_window,
> grp_goal, group, sb))
> grp_goal = -1;
> - } else if (grp_goal > 0) {
> + } else if (grp_goal >= 0) {
> int curr = my_rsv->rsv_end -
> (grp_goal + group_first_block) + 1;
>

-
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