From: Nikolay Borisov <nborisov@suse.com>
To: linux-btrfs@vger.kernel.org
Cc: Nikolay Borisov <nborisov@suse.com>
Subject: [PATCH 2/4] btrfs: consolidate unlink_free_space/__unlink_free_space functions
Date: Tue, 23 Nov 2021 14:44:20 +0200 [thread overview]
Message-ID: <20211123124422.5830-3-nborisov@suse.com> (raw)
In-Reply-To: <20211123124422.5830-1-nborisov@suse.com>
The only difference between the two is whether btrfs_free_space::bytes
is adjusted. Instead of having 2 separate functions control this
behavior via an additional parameter and make them one function instead.
No functional changes.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
fs/btrfs/free-space-cache.c | 41 +++++++++++++++----------------------
1 file changed, 16 insertions(+), 25 deletions(-)
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 8388fa71ce1e..6bc35080afa6 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -37,7 +37,7 @@ struct btrfs_trim_range {
static int link_free_space(struct btrfs_free_space_ctl *ctl,
struct btrfs_free_space *info);
static void unlink_free_space(struct btrfs_free_space_ctl *ctl,
- struct btrfs_free_space *info);
+ struct btrfs_free_space *info, bool update_stat);
static int search_bitmap(struct btrfs_free_space_ctl *ctl,
struct btrfs_free_space *bitmap_info, u64 *offset,
u64 *bytes, bool for_alloc);
@@ -872,7 +872,7 @@ static int copy_free_space_cache(struct btrfs_block_group *block_group,
while (!ret && (n = rb_first(&ctl->free_space_offset)) != NULL) {
info = rb_entry(n, struct btrfs_free_space, offset_index);
if (!info->bitmap) {
- unlink_free_space(ctl, info);
+ unlink_free_space(ctl, info, true);
ret = btrfs_add_free_space(block_group, info->offset,
info->bytes);
kmem_cache_free(btrfs_free_space_cachep, info);
@@ -1699,9 +1699,9 @@ tree_search_offset(struct btrfs_free_space_ctl *ctl,
return entry;
}
-static inline void
-__unlink_free_space(struct btrfs_free_space_ctl *ctl,
- struct btrfs_free_space *info)
+static inline void unlink_free_space(struct btrfs_free_space_ctl *ctl,
+ struct btrfs_free_space *info,
+ bool update_stat)
{
rb_erase(&info->offset_index, &ctl->free_space_offset);
ctl->free_extents--;
@@ -1710,13 +1710,10 @@ __unlink_free_space(struct btrfs_free_space_ctl *ctl,
ctl->discardable_extents[BTRFS_STAT_CURR]--;
ctl->discardable_bytes[BTRFS_STAT_CURR] -= info->bytes;
}
-}
-static void unlink_free_space(struct btrfs_free_space_ctl *ctl,
- struct btrfs_free_space *info)
-{
- __unlink_free_space(ctl, info);
- ctl->free_space -= info->bytes;
+ if (update_stat)
+ ctl->free_space -= info->bytes;
+
}
static int link_free_space(struct btrfs_free_space_ctl *ctl,
@@ -1964,7 +1961,7 @@ static void free_bitmap(struct btrfs_free_space_ctl *ctl,
ctl->discardable_bytes[BTRFS_STAT_CURR] -= bitmap_info->bytes;
}
- unlink_free_space(ctl, bitmap_info);
+ unlink_free_space(ctl, bitmap_info, true);
kmem_cache_free(btrfs_free_space_bitmap_cachep, bitmap_info->bitmap);
kmem_cache_free(btrfs_free_space_cachep, bitmap_info);
ctl->total_bitmaps--;
@@ -2301,10 +2298,7 @@ static bool try_merge_free_space(struct btrfs_free_space_ctl *ctl,
/* See try_merge_free_space() comment. */
if (right_info && !right_info->bitmap &&
(!is_trimmed || btrfs_free_space_trimmed(right_info))) {
- if (update_stat)
- unlink_free_space(ctl, right_info);
- else
- __unlink_free_space(ctl, right_info);
+ unlink_free_space(ctl, right_info, update_stat);
info->bytes += right_info->bytes;
kmem_cache_free(btrfs_free_space_cachep, right_info);
merged = true;
@@ -2314,10 +2308,7 @@ static bool try_merge_free_space(struct btrfs_free_space_ctl *ctl,
if (left_info && !left_info->bitmap &&
left_info->offset + left_info->bytes == offset &&
(!is_trimmed || btrfs_free_space_trimmed(left_info))) {
- if (update_stat)
- unlink_free_space(ctl, left_info);
- else
- __unlink_free_space(ctl, left_info);
+ unlink_free_space(ctl, left_info, update_stat);
info->offset = left_info->offset;
info->bytes += left_info->bytes;
kmem_cache_free(btrfs_free_space_cachep, left_info);
@@ -2681,7 +2672,7 @@ int btrfs_remove_free_space(struct btrfs_block_group *block_group,
re_search = false;
if (!info->bitmap) {
- unlink_free_space(ctl, info);
+ unlink_free_space(ctl, info, true);
if (offset == info->offset) {
u64 to_free = min(bytes, info->bytes);
@@ -2864,7 +2855,7 @@ static void __btrfs_remove_free_space_cache_locked(
while ((node = rb_last(&ctl->free_space_offset)) != NULL) {
info = rb_entry(node, struct btrfs_free_space, offset_index);
if (!info->bitmap) {
- unlink_free_space(ctl, info);
+ unlink_free_space(ctl, info, true);
kmem_cache_free(btrfs_free_space_cachep, info);
} else {
free_bitmap(ctl, info);
@@ -2969,7 +2960,7 @@ u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group,
if (!entry->bytes)
free_bitmap(ctl, entry);
} else {
- unlink_free_space(ctl, entry);
+ unlink_free_space(ctl, entry, true);
align_gap_len = offset - entry->offset;
align_gap = entry->offset;
align_gap_trim_state = entry->trim_state;
@@ -3600,7 +3591,7 @@ static int trim_no_bitmap(struct btrfs_block_group *block_group,
mutex_unlock(&ctl->cache_writeout_mutex);
goto next;
}
- unlink_free_space(ctl, entry);
+ unlink_free_space(ctl, entry, true);
/*
* Let bytes = BTRFS_MAX_DISCARD_SIZE + X.
* If X < BTRFS_ASYNC_DISCARD_MIN_FILTER, we won't trim
@@ -3626,7 +3617,7 @@ static int trim_no_bitmap(struct btrfs_block_group *block_group,
goto next;
}
- unlink_free_space(ctl, entry);
+ unlink_free_space(ctl, entry, true);
kmem_cache_free(btrfs_free_space_cachep, entry);
}
--
2.17.1
next prev parent reply other threads:[~2021-11-23 12:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 12:44 [PATCH 0/4] Misc freespace cache cleanups Nikolay Borisov
2021-11-23 12:44 ` [PATCH 1/4] btrfs: consolidate bitmap_clear_bits/__bitmap_clear_bits Nikolay Borisov
2021-11-23 12:44 ` Nikolay Borisov [this message]
2021-11-23 12:44 ` [PATCH 3/4] btrfs: make __btrfs_add_free_space take just block group reference Nikolay Borisov
2021-11-23 12:44 ` [PATCH 4/4] btrfs: change name and type of private member of btrfs_free_space_ctl Nikolay Borisov
2021-11-23 20:39 ` [PATCH 0/4] Misc freespace cache cleanups David Sterba
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