[GFS2] Only fetch the dinode once in block_map
Function gfs2_block_map was often looking up the disk inode twice. This optimizes it so that only does it once. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
parent
398bbe6832
commit
b0d5fd3074
@ -469,6 +469,7 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
|
||||
unsigned int maxlen = bh_map->b_size >> inode->i_blkbits;
|
||||
struct metapath mp;
|
||||
u64 size;
|
||||
struct buffer_head *dibh = NULL;
|
||||
|
||||
BUG_ON(maxlen == 0);
|
||||
|
||||
@ -499,6 +500,8 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
|
||||
error = gfs2_meta_inode_buffer(ip, &bh);
|
||||
if (error)
|
||||
goto out_fail;
|
||||
dibh = bh;
|
||||
get_bh(dibh);
|
||||
|
||||
for (x = 0; x < end_of_metadata; x++) {
|
||||
lookup_block(ip, bh, x, &mp, create, &new, &dblock);
|
||||
@ -517,13 +520,8 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
|
||||
if (boundary)
|
||||
set_buffer_boundary(bh_map);
|
||||
if (new) {
|
||||
struct buffer_head *dibh;
|
||||
error = gfs2_meta_inode_buffer(ip, &dibh);
|
||||
if (!error) {
|
||||
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
||||
gfs2_dinode_out(ip, dibh->b_data);
|
||||
brelse(dibh);
|
||||
}
|
||||
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
|
||||
gfs2_dinode_out(ip, dibh->b_data);
|
||||
set_buffer_new(bh_map);
|
||||
goto out_brelse;
|
||||
}
|
||||
@ -544,6 +542,8 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
|
||||
out_ok:
|
||||
error = 0;
|
||||
out_fail:
|
||||
if (dibh)
|
||||
brelse(dibh);
|
||||
bmap_unlock(inode, create);
|
||||
return error;
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user