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| author | Steven Whitehouse <swhiteho@redhat.com> | 2007-09-28 13:49:05 +0100 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2008-01-25 08:07:25 +0000 |
| commit | 9ff8ec32e58875022447af619bec6e5aee7c77e4 (patch) | |
| tree | 0c626762f334d1cc066113b3e47a2fa02a72af0c /fs/gfs2/lops.c | |
| parent | 5561093e2cac9f7d2a77e39cc689b8d2b7f9b2bc (diff) | |
| download | blackbird-op-linux-9ff8ec32e58875022447af619bec6e5aee7c77e4.tar.gz blackbird-op-linux-9ff8ec32e58875022447af619bec6e5aee7c77e4.zip | |
[GFS2] Split gfs2_writepage into three cases
This patch splits gfs2_writepage into separate functions for each of
the three cases: writeback, ordered and journalled. As a result
it becomes a lot easier to see what each one is doing. The common
code is moved into gfs2_writepage_common.
This fixes a performance bug where we were doing more work than
strictly required in the ordered write case.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/lops.c')
| -rw-r--r-- | fs/gfs2/lops.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 6c27cea761c6..e901f8f7d650 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -556,17 +556,20 @@ static void databuf_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->tr_touched = 1; - if (gfs2_is_jdata(ip)) { - tr->tr_num_buf++; - list_add(&bd->bd_list_tr, &tr->tr_list_buf); + if (tr) { + if (!list_empty(&bd->bd_list_tr)) + goto out; + 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; - __glock_lo_add(sdp, &bd->bd_gl->gl_le); + if (tr) + __glock_lo_add(sdp, &bd->bd_gl->gl_le); if (gfs2_is_jdata(ip)) { gfs2_pin(sdp, bd->bd_bh); tr->tr_num_databuf_new++; |
