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udf: don't increment lenExtents while writing to a hole

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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>
This commit is contained in:
Namjae Jeon 2012-10-10 00:09:12 +09:00 committed by Jan Kara
parent 2fb7d99d0d
commit fb719c59bd
1 changed files with 5 additions and 2 deletions
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7
fs/udf/inode.c
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@ -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