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| author |   Steven Whitehouse <swhiteho@redhat.com> | 2007-09-03 11:01:33 +0100 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2007-10-10 08:56:12 +0100 |
| commit | 1ad38c437fa33f85ba4b6a85ea8c5478ee72d5bd (patch) | |
| tree | 11a5fc7993ba9ae343fc72f03f9a11f312fd6128 /fs/gfs2/glops.c | |
| parent | [GFS2] Use slab operations for all gfs2_bufdata allocations (diff) | |
| download | linux-dev-1ad38c437fa33f85ba4b6a85ea8c5478ee72d5bd.tar.xz linux-dev-1ad38c437fa33f85ba4b6a85ea8c5478ee72d5bd.zip | |
[GFS2] Clean up gfs2_trans_add_revoke()
The following alters gfs2_trans_add_revoke() to take a struct
gfs2_bufdata as an argument. This eliminates the memory allocation which
was previously required by making use of the already existing struct
gfs2_bufdata. It makes some sanity checks to ensure that the
gfs2_bufdata has been removed from all the lists before its recycled as
a revoke structure. This saves one memory allocation and one free per
revoke structure.
Also as a result, and to simplify the locking, since there is no longer
any blocking code in gfs2_trans_add_revoke() we must hold the log lock
whenever this function is called. This reduces the amount of times we
take and unlock the log lock.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/glops.c')
| -rw-r--r-- | fs/gfs2/glops.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c index b17346a355bf..4670dcb2a877 100644 --- a/fs/gfs2/glops.c +++ b/fs/gfs2/glops.c @@ -41,7 +41,6 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl) struct list_head *head = &gl->gl_ail_list; struct gfs2_bufdata *bd; struct buffer_head *bh; - u64 blkno; int error; blocks = atomic_read(&gl->gl_ail_count); @@ -57,15 +56,12 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl) bd = list_entry(head->next, struct gfs2_bufdata, bd_ail_gl_list); bh = bd->bd_bh; - blkno = bh->b_blocknr; - gfs2_assert_withdraw(sdp, !buffer_busy(bh)); - gfs2_remove_from_ail(NULL, bd); - gfs2_log_unlock(sdp); - - gfs2_trans_add_revoke(sdp, blkno); - - gfs2_log_lock(sdp); + bd->bd_bh = NULL; + bh->b_private = NULL; + bd->bd_blkno = bh->b_blocknr; + gfs2_assert_withdraw(sdp, !buffer_busy(bh)); + gfs2_trans_add_revoke(sdp, bd); } gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count)); gfs2_log_unlock(sdp); |