diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 3c62a7eaf24b6c31c5ed125bab52e9b73805dc67..ba22790f95f7939a3e938f87523aa73f3bf8b103 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3481,7 +3481,6 @@ btrfs_release_block_group(struct btrfs_block_group *cache,
* Helper function for find_free_extent().
*
* Return -ENOENT to inform caller that we need fallback to unclustered mode.
- * Return -EAGAIN to inform caller that we need to re-search this block group
* Return >0 to inform caller that we find nothing
* Return 0 means we have found a location and set ffe_ctl->found_offset.
*/
@@ -3562,14 +3561,6 @@ static int find_free_extent_clustered(struct btrfs_block_group *bg,
trace_btrfs_reserve_extent_cluster(bg, ffe_ctl);
return 0;
}
- } else if (!ffe_ctl->cached && ffe_ctl->loop > LOOP_CACHING_NOWAIT &&
- !ffe_ctl->retry_clustered) {
- spin_unlock(&last_ptr->refill_lock);
-
- ffe_ctl->retry_clustered = true;
- btrfs_wait_block_group_cache_progress(bg, ffe_ctl->num_bytes +
- ffe_ctl->empty_cluster + ffe_ctl->empty_size);
- return -EAGAIN;
}
/*
* At this point we either didn't find a cluster or we weren't able to
@@ -3584,7 +3575,6 @@ static int find_free_extent_clustered(struct btrfs_block_group *bg,
/*
* Return >0 to inform caller that we find nothing
* Return 0 when we found an free extent and set ffe_ctrl->found_offset
- * Return -EAGAIN to inform caller that we need to re-search this block group
*/
static int find_free_extent_unclustered(struct btrfs_block_group *bg,
struct find_free_extent_ctl *ffe_ctl)
@@ -3622,25 +3612,8 @@ static int find_free_extent_unclustered(struct btrfs_block_group *bg,
offset = btrfs_find_space_for_alloc(bg, ffe_ctl->search_start,
ffe_ctl->num_bytes, ffe_ctl->empty_size,
&ffe_ctl->max_extent_size);
-
- /*
- * If we didn't find a chunk, and we haven't failed on this block group
- * before, and this block group is in the middle of caching and we are
- * ok with waiting, then go ahead and wait for progress to be made, and
- * set @retry_unclustered to true.
- *
- * If @retry_unclustered is true then we've already waited on this
- * block group once and should move on to the next block group.
- */
- if (!offset && !ffe_ctl->retry_unclustered && !ffe_ctl->cached &&
- ffe_ctl->loop > LOOP_CACHING_NOWAIT) {
- btrfs_wait_block_group_cache_progress(bg, ffe_ctl->num_bytes +
- ffe_ctl->empty_size);
- ffe_ctl->retry_unclustered = true;
- return -EAGAIN;
- } else if (!offset) {
+ if (!offset)
return 1;
- }
ffe_ctl->found_offset = offset;
return 0;
}
@@ -3654,7 +3627,7 @@ static int do_allocation_clustered(struct btrfs_block_group *block_group,
/* We want to try and use the cluster allocator, so lets look there */
if (ffe_ctl->last_ptr && ffe_ctl->use_cluster) {
ret = find_free_extent_clustered(block_group, ffe_ctl, bg_ret);
- if (ret >= 0 || ret == -EAGAIN)
+ if (ret >= 0)
return ret;
/* ret == -ENOENT case falls through */
}
@@ -3872,8 +3845,7 @@ static void release_block_group(struct btrfs_block_group *block_group,
{
switch (ffe_ctl->policy) {
case BTRFS_EXTENT_ALLOC_CLUSTERED:
- ffe_ctl->retry_clustered = false;
- ffe_ctl->retry_unclustered = false;
+ ffe_ctl->retry_uncached = false;
break;
case BTRFS_EXTENT_ALLOC_ZONED:
/* Nothing to do */
@@ -4220,9 +4192,7 @@ static noinline int find_free_extent(struct btrfs_root *root,
ffe_ctl->orig_have_caching_bg = false;
ffe_ctl->index = btrfs_bg_flags_to_raid_index(ffe_ctl->flags);
ffe_ctl->loop = 0;
- /* For clustered allocation */
- ffe_ctl->retry_clustered = false;
- ffe_ctl->retry_unclustered = false;
+ ffe_ctl->retry_uncached = false;
ffe_ctl->cached = 0;
ffe_ctl->max_extent_size = 0;
ffe_ctl->total_free_space = 0;
@@ -4373,16 +4343,12 @@ static noinline int find_free_extent(struct btrfs_root *root,
bg_ret = NULL;
ret = do_allocation(block_group, ffe_ctl, &bg_ret);
- if (ret == 0) {
- if (bg_ret && bg_ret != block_group) {
- btrfs_release_block_group(block_group,
- ffe_ctl->delalloc);
- block_group = bg_ret;
- }
- } else if (ret == -EAGAIN) {
- goto have_block_group;
- } else if (ret > 0) {
+ if (ret > 0)
goto loop;
+
+ if (bg_ret && bg_ret != block_group) {
+ btrfs_release_block_group(block_group, ffe_ctl->delalloc);
+ block_group = bg_ret;
}
/* Checks */
@@ -4423,6 +4389,15 @@ static noinline int find_free_extent(struct btrfs_root *root,
btrfs_release_block_group(block_group, ffe_ctl->delalloc);
break;
loop:
+ if (!ffe_ctl->cached && ffe_ctl->loop > LOOP_CACHING_NOWAIT &&
+ !ffe_ctl->retry_uncached) {
+ ffe_ctl->retry_uncached = true;
+ btrfs_wait_block_group_cache_progress(block_group,
+ ffe_ctl->num_bytes +
+ ffe_ctl->empty_cluster +
+ ffe_ctl->empty_size);
+ goto have_block_group;
+ }
release_block_group(block_group, ffe_ctl, ffe_ctl->delalloc);
cond_resched();
}
diff --git a/fs/btrfs/extent-tree.h b/fs/btrfs/extent-tree.h
index b9e148adcd28c62b044858184e751f6cf3aeff72..88c249c37516a1b18b89fbe7d98000ce43797037 100644
--- a/fs/btrfs/extent-tree.h
+++ b/fs/btrfs/extent-tree.h
@@ -48,16 +48,11 @@ struct find_free_extent_ctl {
int loop;
/*
- * Whether we're refilling a cluster, if true we need to re-search
- * current block group but don't try to refill the cluster again.
+ * Set to true if we're retrying the allocation on this block group
+ * after waiting for caching progress, this is so that we retry only
+ * once before moving on to another block group.
*/
- bool retry_clustered;
-
- /*
- * Whether we're updating free space cache, if true we need to re-search
- * current block group but don't try updating free space cache again.
- */
- bool retry_unclustered;
+ bool retry_uncached;
/* If current block group is cached */
int cached;