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authorNamjae Jeon <namjae.jeon@samsung.com>2012-10-10 00:09:12 +0900
committerJan Kara <jack@suse.cz>2012-12-13 16:33:23 +0100
commitfb719c59bdb4fca86ee1fd1f42ab3735ca12b6b2 (patch)
tree0228973d626851649787d383e959b97bba83b1d0
parent2fb7d99d0de3fd8ae869f35ab682581d8455887a (diff)
downloadop-kernel-dev-fb719c59bdb4fca86ee1fd1f42ab3735ca12b6b2.zip
op-kernel-dev-fb719c59bdb4fca86ee1fd1f42ab3735ca12b6b2.tar.gz
udf: don't increment lenExtents while writing to a hole
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.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz>
-rw-r--r--fs/udf/inode.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 2b77593..8266f2e 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -601,6 +601,7 @@ 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;
@@ -680,7 +681,7 @@ 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];
@@ -723,6 +724,7 @@ 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,
@@ -770,7 +772,8 @@ 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
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