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authorSteven Whitehouse <swhiteho@redhat.com>2007-09-02 15:39:43 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2007-10-10 08:56:07 +0100
commit82e86087bb774cd54d47db4a7c771b5b29bea9ed (patch)
treec067773861203becfa6c8cf9e4ee449787cf65f6
parent8475487befb29eeb038fef374a7433d276336a25 (diff)
[GFS2] Replace revoke structure with bufdata structure
Both the revoke structure and the bufdata structure are quite similar. They are basically small tags which are put on lists. In addition to which the revoke structure is always allocated when there is a bufdata structure which is (or can be) freed. As such it should be possible to reduce the number of frees and allocations by using the same structure for both purposes. This patch is the first step along that path. It replaces existing uses of the revoke structure with the bufdata structure. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
-rw-r--r--fs/gfs2/incore.h13
-rw-r--r--fs/gfs2/lops.c10
-rw-r--r--fs/gfs2/trans.c20
3 files changed, 22 insertions, 21 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 388dc1bd736..8aa5780862b 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -114,7 +114,13 @@ struct gfs2_bufdata {
struct buffer_head *bd_bh;
struct gfs2_glock *bd_gl;
- struct list_head bd_list_tr;
+ union {
+ struct list_head list_tr;
+ u64 blkno;
+ } u;
+#define bd_list_tr u.list_tr
+#define bd_blkno u.blkno
+
struct gfs2_log_element bd_le;
struct gfs2_ail *bd_ail;
@@ -298,11 +304,6 @@ struct gfs2_file {
struct gfs2_holder f_fl_gh;
};
-struct gfs2_revoke {
- struct gfs2_log_element rv_le;
- u64 rv_blkno;
-};
-
struct gfs2_revoke_replay {
struct list_head rr_list;
u64 rr_blkno;
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 7e2d4e692b5..cf6fe363155 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -357,7 +357,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
struct buffer_head *bh;
unsigned int offset;
struct list_head *head = &sdp->sd_log_le_revoke;
- struct gfs2_revoke *rv;
+ struct gfs2_bufdata *bd;
if (!sdp->sd_log_num_revoke)
return;
@@ -376,8 +376,8 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
offset = sizeof(struct gfs2_log_descriptor);
while (!list_empty(head)) {
- rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list);
- list_del_init(&rv->rv_le.le_list);
+ bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
+ list_del_init(&bd->bd_le.le_list);
sdp->sd_log_num_revoke--;
if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
@@ -392,8 +392,8 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
offset = sizeof(struct gfs2_meta_header);
}
- *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno);
- kfree(rv);
+ *(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno);
+ kfree(bd);
offset += sizeof(u64);
}
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index f8dabf8446b..eadf96e0051 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -144,23 +144,23 @@ void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, u64 blkno)
{
- struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke),
- GFP_NOFS | __GFP_NOFAIL);
- lops_init_le(&rv->rv_le, &gfs2_revoke_lops);
- rv->rv_blkno = blkno;
- lops_add(sdp, &rv->rv_le);
+ struct gfs2_bufdata *bd = kmalloc(sizeof(struct gfs2_bufdata),
+ GFP_NOFS | __GFP_NOFAIL);
+ lops_init_le(&bd->bd_le, &gfs2_revoke_lops);
+ bd->bd_blkno = blkno;
+ lops_add(sdp, &bd->bd_le);
}
void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno)
{
- struct gfs2_revoke *rv;
+ struct gfs2_bufdata *bd;
int found = 0;
gfs2_log_lock(sdp);
- list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) {
- if (rv->rv_blkno == blkno) {
- list_del(&rv->rv_le.le_list);
+ list_for_each_entry(bd, &sdp->sd_log_le_revoke, bd_le.le_list) {
+ if (bd->bd_blkno == blkno) {
+ list_del(&bd->bd_le.le_list);
gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
sdp->sd_log_num_revoke--;
found = 1;
@@ -172,7 +172,7 @@ void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno)
if (found) {
struct gfs2_trans *tr = current->journal_info;
- kfree(rv);
+ kfree(bd);
tr->tr_num_revoke_rm++;
}
}