aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJan Kara <jack@suse.cz>2009-07-16 18:02:25 +0200
committerJan Kara <jack@suse.cz>2009-09-14 19:13:00 +0200
commit81056dd04465902461b627169c4b4487a11acba1 (patch)
tree902b49848f8d2033c24ad78ac5d391bf092091ef
parentudf: Remove wrong assignment in udf_symlink (diff)
downloadlinux-dev-81056dd04465902461b627169c4b4487a11acba1.tar.xz
linux-dev-81056dd04465902461b627169c4b4487a11acba1.zip
udf: Perform preallocation only for regular files
So far we preallocated blocks also for directories but that brings a problem, when to get rid of preallocated blocks we don't need. So far we removed them in udf_clear_inode() which has a disadvantage that 1) blocks are unavailable long after writing to a directory finished and thus one can get out of space unnecessarily early 2) releasing blocks from udf_clear_inode is problematic because VFS does not expect us to redirty inode there and it also slows down memory reclaim. So preallocate blocks only for regular files where we can drop preallocation in udf_release_file. Signed-off-by: Jan Kara <jack@suse.cz>
-rw-r--r--fs/udf/inode.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index e7533f785636..6d24c2c63f93 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -90,19 +90,16 @@ no_delete:
}
/*
- * If we are going to release inode from memory, we discard preallocation and
- * truncate last inode extent to proper length. We could use drop_inode() but
- * it's called under inode_lock and thus we cannot mark inode dirty there. We
- * use clear_inode() but we have to make sure to write inode as it's not written
- * automatically.
+ * If we are going to release inode from memory, we truncate last inode extent
+ * to proper length. We could use drop_inode() but it's called under inode_lock
+ * and thus we cannot mark inode dirty there. We use clear_inode() but we have
+ * to make sure to write inode as it's not written automatically.
*/
void udf_clear_inode(struct inode *inode)
{
struct udf_inode_info *iinfo;
if (!(inode->i_sb->s_flags & MS_RDONLY)) {
lock_kernel();
- /* Discard preallocation for directories, symlinks, etc. */
- udf_discard_prealloc(inode);
udf_truncate_tail_extent(inode);
unlock_kernel();
write_inode_now(inode, 0);
@@ -664,8 +661,12 @@ static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
#ifdef UDF_PREALLOCATE
- /* preallocate blocks */
- udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
+ /* We preallocate blocks only for regular files. It also makes sense
+ * for directories but there's a problem when to drop the
+ * preallocation. We might use some delayed work for that but I feel
+ * it's overengineering for a filesystem like UDF. */
+ if (S_ISREG(inode->i_mode))
+ udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
#endif
/* merge any continuous blocks in laarr */