3.5.7.3 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Namjae Jeon <namjae.j...@samsung.com>
commit fb719c59bdb4fca86ee1fd1f42ab3735ca12b6b2 upstream.
Incrementing lenExtents even while writing to a hole is bad
for performance as calls to udf_discard_prealloc and
udf_truncate_tail_extent would not return from start if
isize != lenExtents
Signed-off-by: Namjae Jeon <namjae.j...@samsung.com>
Signed-off-by: Ashish Sangwan <a.sang...@samsung.com>
Signed-off-by: Jan Kara <j...@suse.cz>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesin...@canonical.com>
---
fs/udf/inode.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 8873c47..fb65df5 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -574,6 +574,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t
block,
struct udf_inode_info *iinfo = UDF_I(inode);
int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
int lastblock = 0;
+ bool isBeyondEOF;
*err = 0;
*new = 0;
@@ -653,7 +654,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t
block,
/* Are we beyond EOF? */
if (etype == -1) {
int ret;
-
+ isBeyondEOF = 1;
if (count) {
if (c)
laarr[0] = laarr[1];
@@ -696,6 +697,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t
block,
endnum = c + 1;
lastblock = 1;
} else {
+ isBeyondEOF = 0;
endnum = startnum = ((count > 2) ? 2 : count);
/* if the current extent is in position 0,
@@ -743,7 +745,8 @@ static sector_t inode_getblk(struct inode *inode, sector_t
block,
*err = -ENOSPC;
return 0;
}
- iinfo->i_lenExtents += inode->i_sb->s_blocksize;
+ if (isBeyondEOF)
+ iinfo->i_lenExtents += inode->i_sb->s_blocksize;
}
/* if the extent the requsted block is located in contains multiple
--
1.7.9.5
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