As of now writes smaller than 64k for non compressed extents and 16k
for compressed extents inside eof are considered as candidate
for auto defrag, put them together at a place.
---
fs/btrfs/inode.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 79f073e94f2d..b157575166c6 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -388,6 +388,22 @@ static inline int inode_need_compress(struct inode *inode)
return 0;
}
+static inline void inode_should_defrag(struct inode *inode,
+ u64 start, u64 end, u64 num_bytes, int comp_type)
+{
+ u64 small_write = SZ_64K;
+ if (comp_type)
+ small_write = SZ_16K;
+
+ if (!num_bytes)
+ num_bytes = end - start + 1;
+
+ /* If this is a small write inside eof, kick off a defrag */
+ if (num_bytes < small_write &&
+ (start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size))
+ btrfs_add_inode_defrag(NULL, inode);
+}
+
/*
* we create compressed extents in two phases. The first
* phase compresses a range of pages that have already been
@@ -429,10 +445,7 @@ static noinline void compress_file_range(struct inode
*inode,
int compress_type = root->fs_info->compress_type;
int redirty = 0;
- /* if this is a small write inside eof, kick off a defrag */
- if ((end - start + 1) < SZ_16K &&
- (start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size))
- btrfs_add_inode_defrag(NULL, inode);
+ inode_should_defrag(inode, start, end, 0, compress_type);
actual_end = min_t(u64, isize, end + 1);
again:
@@ -960,10 +973,8 @@ static noinline int cow_file_range(struct inode *inode,
num_bytes = ALIGN(end - start + 1, blocksize);
num_bytes = max(blocksize, num_bytes);
- /* if this is a small write inside eof, kick off defrag */
- if (num_bytes < SZ_64K &&
- (start > 0 || end + 1 < BTRFS_I(inode)->disk_i_size))
- btrfs_add_inode_defrag(NULL, inode);
+ inode_should_defrag(inode, start, end, num_bytes,
+ BTRFS_COMPRESS_NONE);
if (start == 0) {
/* lets try to make an inline extent */
--
2.10.0
--
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