Re: [RFC] btrfs: make max inline data can be equal to sectorsize

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hi,

On 10/11/2016 02:47 PM, Wang Xiaoguang wrote:
If we use mount option "-o max_inline=sectorsize", say 4096, indeed
even for a fresh fs, say nodesize is 16k, we can not make the first
4k data completely inline, I found this conditon causing this issue:
   !compressed_size && (actual_end & (root->sectorsize - 1)) == 0

If it retuns true, we'll not make data inline. For 4k sectorsize,
0~4094 dara range, we can make it inline, but 0~4095, it can not.
I don't think this limition is useful, so here remove it which will
make max inline data can be equal to sectorsize.

Signed-off-by: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx>
---
  fs/btrfs/inode.c | 2 --
  1 file changed, 2 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index ea15520..c0db393 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -267,8 +267,6 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
  	if (start > 0 ||
  	    actual_end > root->sectorsize ||
  	    data_len > BTRFS_MAX_INLINE_DATA_SIZE(root) ||
-	    (!compressed_size &&
-	    (actual_end & (root->sectorsize - 1)) == 0) ||
  	    end + 1 < isize ||
  	    data_len > root->fs_info->max_inline) {
  		return 1;
Any comments about this patch?

Regards,
Xiaoguang Wang




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