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authorZhao Lei <zhaolei@cn.fujitsu.com>2015-12-18 21:33:05 +0800
committerDavid Sterba <dsterba@suse.com>2016-02-16 13:21:45 +0100
commit503785306d182ab624a2232856ef8ab503ee85f9 (patch)
treec2904b3fad25ef1662a2c4ad6623fd2bdaf75317 /fs/btrfs/reada.c
parent388f7b1d6e8ca06762e2454d28d6c3c55ad0fe95 (diff)
downloadlinux-503785306d182ab624a2232856ef8ab503ee85f9.tar.bz2
btrfs: reada: Fix in-segment calculation for reada
reada_zone->end is end pos of segment: end = start + cache->key.offset - 1; So we need to use "<=" in condition to judge is a pos in the segment. The problem happened rearly, because logical pos rarely pointed to last 4k of a blockgroup, but we need to fix it to make code right in logic. Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/reada.c')
-rw-r--r--fs/btrfs/reada.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 619f92963e27..49b3fb73ffbf 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -265,7 +265,7 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
spin_unlock(&fs_info->reada_lock);
if (ret == 1) {
- if (logical >= zone->start && logical < zone->end)
+ if (logical >= zone->start && logical <= zone->end)
return zone;
spin_lock(&fs_info->reada_lock);
kref_put(&zone->refcnt, reada_zone_release);
@@ -679,7 +679,7 @@ static int reada_start_machine_dev(struct btrfs_fs_info *fs_info,
*/
ret = radix_tree_gang_lookup(&dev->reada_extents, (void **)&re,
dev->reada_next >> PAGE_CACHE_SHIFT, 1);
- if (ret == 0 || re->logical >= dev->reada_curr_zone->end) {
+ if (ret == 0 || re->logical > dev->reada_curr_zone->end) {
ret = reada_pick_zone(dev);
if (!ret) {
spin_unlock(&fs_info->reada_lock);