This patch and the previous one(The following patch) also fixed a oops, which can be reproduced
by LTP stress test(ltpstress.sh + fsstress).
[PATCH] btrfs: Fix and enhance merge_extent_mapping() to insert best fitted extent map
Thanks
Miao
On Mon, 22 Sep 2014 09:13:03 +0800, Qu Wenruo wrote:
> Previous commit: btrfs: Fix and enhance merge_extent_mapping() to insert
> best fitted extent map
> is using wrong condition to judgement whether the range is a subset of a
> existing extent map.
>
> This may cause bug in btrfs no-holes mode.
>
> This patch will correct the judgment and fix the bug.
>
> Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
> ---
> fs/btrfs/inode.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
> index 8039021..a99ee9d 100644
> --- a/fs/btrfs/inode.c
> +++ b/fs/btrfs/inode.c
> @@ -6527,7 +6527,7 @@ insert:
> * extent causing the -EEXIST.
> */
> if (start >= extent_map_end(existing) ||
> - start + len <= existing->start) {
> + start <= existing->start) {
> /*
> * The existing extent map is the one nearest to
> * the [start, start + len) range which overlaps
>
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