[PATCH 1/3] xfs: replace on-stack xfs_trans_res with pointer in xfs_create()

Brian Foster
2014-11-14T16:37:29Z

There's no need to store a full struct xfs_trans_res on the stack in
xfs_create() and copy the fields. Use a pointer to the appropriate
structures embedded in the xfs_mount.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/xfs_inode.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 8ed049d..2ffb802 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1082,7 +1082,7 @@ xfs_create(
struct xfs_dquot *udqp = NULL;
struct xfs_dquot *gdqp = NULL;
struct xfs_dquot *pdqp = NULL;
- struct xfs_trans_res tres;
+ struct xfs_trans_res *tres;
uint resblks;

trace_xfs_create(dp, name);
@@ -1105,13 +1105,11 @@ xfs_create(
if (is_dir) {
rdev = 0;
resblks = XFS_MKDIR_SPACE_RES(mp, name->len);
- tres.tr_logres = M_RES(mp)->tr_mkdir.tr_logres;
- tres.tr_logcount = XFS_MKDIR_LOG_COUNT;
+ tres = &M_RES(mp)->tr_mkdir;
tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
} else {
resblks = XFS_CREATE_SPACE_RES(mp, name->len);
- tres.tr_logres = M_RES(mp)->tr_create.tr_logres;
- tres.tr_logcount = XFS_CREATE_LOG_COUNT;
+ tres = &M_RES(mp)->tr_create;
tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
}

@@ -1123,17 +1121,16 @@ xfs_create(
* the case we'll drop the one we have and get a more
* appropriate transaction later.
*/
- tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
- error = xfs_trans_reserve(tp, &tres, resblks, 0);
+ error = xfs_trans_reserve(tp, tres, resblks, 0);
if (error == -ENOSPC) {
/* flush outstanding delalloc blocks and retry */
xfs_flush_inodes(mp);
- error = xfs_trans_reserve(tp, &tres, resblks, 0);
+ error = xfs_trans_reserve(tp, tres, resblks, 0);
}
if (error == -ENOSPC) {
/* No space at all so try a "no-allocation" reservation */
resblks = 0;
- error = xfs_trans_reserve(tp, &tres, 0, 0);
+ error = xfs_trans_reserve(tp, tres, 0, 0);
}
if (error) {
cancel_flags = 0;