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authorSteven Whitehouse <swhiteho@redhat.com>2012-04-16 16:40:56 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2012-04-24 16:44:36 +0100
commitc50b91c4bd511dfe844e2aa7be429b6b88406353 (patch)
tree0a9584ec238036b599bb717db5bd1a7df5c616ca /fs/gfs2
parentdad30e9031c5927c30b402f73ac57ffbe09dc9ee (diff)
downloadlinux-c50b91c4bd511dfe844e2aa7be429b6b88406353.tar.bz2
GFS2: Remove bd_list_tr
This is another clean up in the logging code. This per-transaction list was largely unused. Its main function was to ensure that the number of buffers in a transaction was correct, however that counter was only used to check the number of buffers in the bd_list_tr, plus an assert at the end of each transaction. With the assert now changed to use the calculated buffer counts, we can remove both bd_list_tr and its associated counter. This should make the code easier to understand as well as shrinking a couple of structures. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/aops.c1
-rw-r--r--fs/gfs2/glops.c1
-rw-r--r--fs/gfs2/incore.h11
-rw-r--r--fs/gfs2/log.c17
-rw-r--r--fs/gfs2/lops.c14
-rw-r--r--fs/gfs2/meta_io.c1
-rw-r--r--fs/gfs2/trans.c32
7 files changed, 21 insertions, 56 deletions
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 56dc1f0084ba..a627b3ee5c9f 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1084,7 +1084,6 @@ int gfs2_releasepage(struct page *page, gfp_t gfp_mask)
bd = bh->b_private;
if (bd) {
gfs2_assert_warn(sdp, bd->bd_bh == bh);
- gfs2_assert_warn(sdp, list_empty(&bd->bd_list_tr));
if (!list_empty(&bd->bd_le.le_list)) {
if (!buffer_pinned(bh))
list_del_init(&bd->bd_le.le_list);
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 1656df7aacd2..cd3e6fbf111b 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -94,7 +94,6 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
/* A shortened, inline version of gfs2_trans_begin() */
tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
tr.tr_ip = (unsigned long)__builtin_return_address(0);
- INIT_LIST_HEAD(&tr.tr_list_buf);
gfs2_log_reserve(sdp, tr.tr_reserved);
BUG_ON(current->journal_info);
current->journal_info = &tr;
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index dd97f64a8bd4..e773fbc28f95 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -118,13 +118,7 @@ TAS_BUFFER_FNS(Zeronew, zeronew)
struct gfs2_bufdata {
struct buffer_head *bd_bh;
struct gfs2_glock *bd_gl;
-
- union {
- struct list_head list_tr;
- u64 blkno;
- } u;
-#define bd_list_tr u.list_tr
-#define bd_blkno u.blkno
+ u64 bd_blkno;
struct gfs2_log_element bd_le;
@@ -411,13 +405,10 @@ struct gfs2_trans {
int tr_touched;
- unsigned int tr_num_buf;
unsigned int tr_num_buf_new;
unsigned int tr_num_databuf_new;
unsigned int tr_num_buf_rm;
unsigned int tr_num_databuf_rm;
- struct list_head tr_list_buf;
-
unsigned int tr_num_revoke;
unsigned int tr_num_revoke_rm;
};
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index f5eacb3589ba..2307218de6e4 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -696,21 +696,6 @@ static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
gfs2_log_unlock(sdp);
}
-static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
-{
- struct list_head *head = &tr->tr_list_buf;
- struct gfs2_bufdata *bd;
-
- gfs2_log_lock(sdp);
- while (!list_empty(head)) {
- bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr);
- list_del_init(&bd->bd_list_tr);
- tr->tr_num_buf--;
- }
- gfs2_log_unlock(sdp);
- gfs2_assert_warn(sdp, !tr->tr_num_buf);
-}
-
/**
* gfs2_log_commit - Commit a transaction to the log
* @sdp: the filesystem
@@ -729,8 +714,6 @@ static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
{
log_refund(sdp, tr);
- buf_lo_incore_commit(sdp, tr);
-
up_read(&sdp->sd_log_flush_lock);
if (atomic_read(&sdp->sd_log_pinned) > atomic_read(&sdp->sd_log_thresh1) ||
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 7882671bfe09..e9709dabc267 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -396,12 +396,8 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
lock_buffer(bd->bd_bh);
gfs2_log_lock(sdp);
- if (!list_empty(&bd->bd_list_tr))
- goto out;
tr = current->journal_info;
tr->tr_touched = 1;
- tr->tr_num_buf++;
- list_add(&bd->bd_list_tr, &tr->tr_list_buf);
if (!list_empty(&le->le_list))
goto out;
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
@@ -781,18 +777,10 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
lock_buffer(bd->bd_bh);
gfs2_log_lock(sdp);
- if (tr) {
- if (!list_empty(&bd->bd_list_tr))
- goto out;
+ if (tr)
tr->tr_touched = 1;
- if (gfs2_is_jdata(ip)) {
- tr->tr_num_buf++;
- list_add(&bd->bd_list_tr, &tr->tr_list_buf);
- }
- }
if (!list_empty(&le->le_list))
goto out;
-
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
if (gfs2_is_jdata(ip)) {
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 181586e673f9..8a82a4dc711f 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -293,7 +293,6 @@ void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
bd->bd_bh = bh;
bd->bd_gl = gl;
- INIT_LIST_HEAD(&bd->bd_list_tr);
if (meta)
lops_init_le(&bd->bd_le, &gfs2_buf_lops);
else
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index 86ac75d99d31..8fb631769172 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -50,8 +50,6 @@ int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
if (revokes)
tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
sizeof(u64));
- INIT_LIST_HEAD(&tr->tr_list_buf);
-
gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh);
error = gfs2_glock_nq(&tr->tr_t_gh);
@@ -93,10 +91,21 @@ static void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
up_read(&sdp->sd_log_flush_lock);
}
+static void gfs2_print_trans(const struct gfs2_trans *tr)
+{
+ print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
+ printk(KERN_WARNING "GFS2: blocks=%u revokes=%u reserved=%u touched=%d\n",
+ tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, tr->tr_touched);
+ printk(KERN_WARNING "GFS2: Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
+ tr->tr_num_buf_new, tr->tr_num_buf_rm,
+ tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
+ tr->tr_num_revoke, tr->tr_num_revoke_rm);
+}
+
void gfs2_trans_end(struct gfs2_sbd *sdp)
{
struct gfs2_trans *tr = current->journal_info;
-
+ s64 nbuf;
BUG_ON(!tr);
current->journal_info = NULL;
@@ -110,16 +119,13 @@ void gfs2_trans_end(struct gfs2_sbd *sdp)
return;
}
- if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) {
- fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ",
- tr->tr_num_buf, tr->tr_blocks);
- print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
- }
- if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) {
- fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ",
- tr->tr_num_revoke, tr->tr_revokes);
- print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
- }
+ nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
+ nbuf -= tr->tr_num_buf_rm;
+ nbuf -= tr->tr_num_databuf_rm;
+
+ if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
+ (tr->tr_num_revoke <= tr->tr_revokes)))
+ gfs2_print_trans(tr);
gfs2_log_commit(sdp, tr);
if (tr->tr_t_gh.gh_gl) {