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Diffstat (limited to 'fs/gfs2/lops.c')
-rw-r--r--fs/gfs2/lops.c160
1 files changed, 40 insertions, 120 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 3ec5871..7e2d4e6 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -555,10 +555,11 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
if (gfs2_is_jdata(ip)) {
gfs2_pin(sdp, bd->bd_bh);
tr->tr_num_databuf_new++;
- sdp->sd_log_num_jdata++;
+ sdp->sd_log_num_databuf++;
+ list_add(&le->le_list, &sdp->sd_log_le_databuf);
+ } else {
+ list_add(&le->le_list, &sdp->sd_log_le_ordered);
}
- sdp->sd_log_num_databuf++;
- list_add(&le->le_list, &sdp->sd_log_le_databuf);
out:
gfs2_log_unlock(sdp);
unlock_buffer(bd->bd_bh);
@@ -583,114 +584,59 @@ static int gfs2_check_magic(struct buffer_head *bh)
/**
* databuf_lo_before_commit - Scan the data buffers, writing as we go
*
- * Here we scan through the lists of buffers and make the assumption
- * that any buffer thats been pinned is being journaled, and that
- * any unpinned buffer is an ordered write data buffer and therefore
- * will be written back rather than journaled.
*/
+
static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
{
- LIST_HEAD(started);
- struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt;
+ struct gfs2_bufdata *bd1 = NULL, *bd2;
struct buffer_head *bh = NULL,*bh1 = NULL;
struct gfs2_log_descriptor *ld;
unsigned int limit;
- unsigned int total_dbuf;
- unsigned int total_jdata;
+ unsigned int total;
unsigned int num, n;
__be64 *ptr = NULL;
+ int magic;
+
limit = databuf_limit(sdp);
- /*
- * Start writing ordered buffers, write journaled buffers
- * into the log along with a header
- */
gfs2_log_lock(sdp);
- total_dbuf = sdp->sd_log_num_databuf;
- total_jdata = sdp->sd_log_num_jdata;
+ total = sdp->sd_log_num_databuf;
bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf,
bd_le.le_list);
- while(total_dbuf) {
- num = total_jdata;
+ while(total) {
+ num = total;
if (num > limit)
num = limit;
+
+ gfs2_log_unlock(sdp);
+ bh = gfs2_log_get_buf(sdp);
+ gfs2_log_lock(sdp);
+
+ ld = (struct gfs2_log_descriptor *)bh->b_data;
+ ptr = (__be64 *)(bh->b_data + DATABUF_OFFSET);
+ ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
+ ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
+ ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
+ ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_JDATA);
+ ld->ld_length = cpu_to_be32(num + 1);
+ ld->ld_data1 = cpu_to_be32(num);
+ ld->ld_data2 = cpu_to_be32(0);
+ memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
+
n = 0;
- list_for_each_entry_safe_continue(bd1, bdt,
- &sdp->sd_log_le_databuf,
- bd_le.le_list) {
- /* store off the buffer head in a local ptr since
- * gfs2_bufdata might change when we drop the log lock
- */
+ list_for_each_entry_continue(bd1, &sdp->sd_log_le_databuf,
+ bd_le.le_list) {
bh1 = bd1->bd_bh;
- /* An ordered write buffer */
- if (bh1 && !buffer_pinned(bh1)) {
- list_move(&bd1->bd_le.le_list, &started);
- if (bd1 == bd2) {
- bd2 = NULL;
- bd2 = list_prepare_entry(bd2,
- &sdp->sd_log_le_databuf,
- bd_le.le_list);
- }
- total_dbuf--;
- if (bh1) {
- if (buffer_dirty(bh1)) {
- get_bh(bh1);
-
- gfs2_log_unlock(sdp);
-
- ll_rw_block(SWRITE, 1, &bh1);
- brelse(bh1);
-
- gfs2_log_lock(sdp);
- }
- continue;
- }
- continue;
- } else if (bh1) { /* A journaled buffer */
- int magic;
- gfs2_log_unlock(sdp);
- if (!bh) {
- bh = gfs2_log_get_buf(sdp);
- ld = (struct gfs2_log_descriptor *)
- bh->b_data;
- ptr = (__be64 *)(bh->b_data +
- DATABUF_OFFSET);
- ld->ld_header.mh_magic =
- cpu_to_be32(GFS2_MAGIC);
- ld->ld_header.mh_type =
- cpu_to_be32(GFS2_METATYPE_LD);
- ld->ld_header.mh_format =
- cpu_to_be32(GFS2_FORMAT_LD);
- ld->ld_type =
- cpu_to_be32(GFS2_LOG_DESC_JDATA);
- ld->ld_length = cpu_to_be32(num + 1);
- ld->ld_data1 = cpu_to_be32(num);
- ld->ld_data2 = cpu_to_be32(0);
- memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
- }
- magic = gfs2_check_magic(bh1);
- *ptr++ = cpu_to_be64(bh1->b_blocknr);
- *ptr++ = cpu_to_be64((__u64)magic);
- clear_buffer_escaped(bh1);
- if (unlikely(magic != 0))
- set_buffer_escaped(bh1);
- gfs2_log_lock(sdp);
- if (++n >= num)
- break;
- } else if (!bh1) {
- total_dbuf--;
- sdp->sd_log_num_databuf--;
- list_del_init(&bd1->bd_le.le_list);
- if (bd1 == bd2) {
- bd2 = NULL;
- bd2 = list_prepare_entry(bd2,
- &sdp->sd_log_le_databuf,
- bd_le.le_list);
- }
- kmem_cache_free(gfs2_bufdata_cachep, bd1);
- }
+ magic = gfs2_check_magic(bh1);
+ *ptr++ = cpu_to_be64(bh1->b_blocknr);
+ *ptr++ = cpu_to_be64((__u64)magic);
+ clear_buffer_escaped(bh1);
+ if (unlikely(magic != 0))
+ set_buffer_escaped(bh1);
+ if (++n >= num)
+ break;
}
gfs2_log_unlock(sdp);
if (bh) {
@@ -727,34 +673,10 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
break;
}
bh = NULL;
- BUG_ON(total_dbuf < num);
- total_dbuf -= num;
- total_jdata -= num;
+ BUG_ON(total < num);
+ total -= num;
}
gfs2_log_unlock(sdp);
-
- /* Wait on all ordered buffers */
- while (!list_empty(&started)) {
- gfs2_log_lock(sdp);
- bd1 = list_entry(started.next, struct gfs2_bufdata,
- bd_le.le_list);
- list_del_init(&bd1->bd_le.le_list);
- sdp->sd_log_num_databuf--;
- bh = bd1->bd_bh;
- if (bh) {
- bh->b_private = NULL;
- get_bh(bh);
- gfs2_log_unlock(sdp);
- wait_on_buffer(bh);
- brelse(bh);
- } else
- gfs2_log_unlock(sdp);
-
- kmem_cache_free(gfs2_bufdata_cachep, bd1);
- }
-
- /* We've removed all the ordered write bufs here, so only jdata left */
- gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata);
}
static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
@@ -838,11 +760,9 @@ static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
list_del_init(&bd->bd_le.le_list);
sdp->sd_log_num_databuf--;
- sdp->sd_log_num_jdata--;
gfs2_unpin(sdp, bd->bd_bh, ai);
}
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
- gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata);
}
generated by cgit v1.1 at 2024-06-27 19:06:44 +0000