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authorSteven Whitehouse <swhiteho@redhat.com>2007-11-08 14:25:12 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2008-01-25 08:07:52 +0000
commit2bcd610d2fdea608a8fdac32788fc35a32a2327c (patch)
tree5b3753ff18c1da54bb860dbd67211e6abea78ca7 /fs/gfs2/lops.c
parent8cbc4342478311c2a85260a7ca54d96cb7f71f7b (diff)
downloadop-kernel-dev-2bcd610d2fdea608a8fdac32788fc35a32a2327c.zip
op-kernel-dev-2bcd610d2fdea608a8fdac32788fc35a32a2327c.tar.gz
[GFS2] Don't add glocks to the journal
The only reason for adding glocks to the journal was to keep track of which locks required a log flush prior to release. We add a flag to the glock to allow this check to be made in a simpler way. This reduces the size of a glock (by 12 bytes on i386, 24 on x86_64) and means that we can avoid extra work during the journal flush. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/lops.c')
-rw-r--r--fs/gfs2/lops.c58
1 files changed, 5 insertions, 53 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index e901f8f..fae59d6 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -87,6 +87,7 @@ static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
}
bd->bd_ail = ai;
list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list);
+ clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
gfs2_log_unlock(sdp);
unlock_buffer(bh);
}
@@ -124,49 +125,6 @@ static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type)
return bh;
}
-static void __glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
-{
- struct gfs2_glock *gl;
- struct gfs2_trans *tr = current->journal_info;
-
- tr->tr_touched = 1;
-
- gl = container_of(le, struct gfs2_glock, gl_le);
- if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)))
- return;
-
- if (!list_empty(&le->le_list))
- return;
-
- gfs2_glock_hold(gl);
- set_bit(GLF_DIRTY, &gl->gl_flags);
- sdp->sd_log_num_gl++;
- list_add(&le->le_list, &sdp->sd_log_le_gl);
-}
-
-static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
-{
- gfs2_log_lock(sdp);
- __glock_lo_add(sdp, le);
- gfs2_log_unlock(sdp);
-}
-
-static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
-{
- struct list_head *head = &sdp->sd_log_le_gl;
- struct gfs2_glock *gl;
-
- while (!list_empty(head)) {
- gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list);
- list_del_init(&gl->gl_le.le_list);
- sdp->sd_log_num_gl--;
-
- gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl));
- gfs2_glock_put(gl);
- }
- gfs2_assert_warn(sdp, !sdp->sd_log_num_gl);
-}
-
static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
{
struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
@@ -182,7 +140,8 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
list_add(&bd->bd_list_tr, &tr->tr_list_buf);
if (!list_empty(&le->le_list))
goto out;
- __glock_lo_add(sdp, &bd->bd_gl->gl_le);
+ set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
+ set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
gfs2_meta_check(sdp, bd->bd_bh);
gfs2_pin(sdp, bd->bd_bh);
sdp->sd_log_num_buf++;
@@ -568,8 +527,8 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
if (!list_empty(&le->le_list))
goto out;
- if (tr)
- __glock_lo_add(sdp, &bd->bd_gl->gl_le);
+ set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
+ set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
if (gfs2_is_jdata(ip)) {
gfs2_pin(sdp, bd->bd_bh);
tr->tr_num_databuf_new++;
@@ -776,12 +735,6 @@ static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
}
-const struct gfs2_log_operations gfs2_glock_lops = {
- .lo_add = glock_lo_add,
- .lo_after_commit = glock_lo_after_commit,
- .lo_name = "glock",
-};
-
const struct gfs2_log_operations gfs2_buf_lops = {
.lo_add = buf_lo_add,
.lo_incore_commit = buf_lo_incore_commit,
@@ -819,7 +772,6 @@ const struct gfs2_log_operations gfs2_databuf_lops = {
};
const struct gfs2_log_operations *gfs2_log_ops[] = {
- &gfs2_glock_lops,
&gfs2_databuf_lops,
&gfs2_buf_lops,
&gfs2_rg_lops,
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