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authorSteven Whitehouse <swhiteho@redhat.com>2007-09-03 11:01:33 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2007-10-10 08:56:12 +0100
commit1ad38c437fa33f85ba4b6a85ea8c5478ee72d5bd (patch)
tree11a5fc7993ba9ae343fc72f03f9a11f312fd6128 /fs/gfs2/glops.c
parent0820ab517e1b100ee3f9584ec27f93309689ebe7 (diff)
downloadop-kernel-dev-1ad38c437fa33f85ba4b6a85ea8c5478ee72d5bd.zip
op-kernel-dev-1ad38c437fa33f85ba4b6a85ea8c5478ee72d5bd.tar.gz
[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.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index b17346a..4670dcb 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);
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