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authorSteven Whitehouse <swhiteho@redhat.com>2013-01-28 09:30:07 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2013-01-29 10:29:17 +0000
commit4513899092b3254b3539f92a65d2839afa1d50f6 (patch)
tree1080b7adfac648dacd2d4aa70643a6a456284492 /fs/gfs2/log.h
parentd564053f074634e7a966359dc97d26900fa5f52d (diff)
downloadop-kernel-dev-4513899092b3254b3539f92a65d2839afa1d50f6.zip
op-kernel-dev-4513899092b3254b3539f92a65d2839afa1d50f6.tar.gz
GFS2: Use ->writepages for ordered writes
Instead of using a list of buffers to write ahead of the journal flush, this now uses a list of inodes and calls ->writepages via filemap_fdatawrite() in order to achieve the same thing. For most use cases this results in a shorter ordered write list, as well as much larger i/os being issued. The ordered write list is sorted by inode number before writing in order to retain the disk block ordering between inodes as per the previous code. The previous ordered write code used to conflict in its assumptions about how to write out the disk blocks with mpage_writepages() so that with this updated version we can also use mpage_writepages() for GFS2's ordered write, writepages implementation. So we will also send larger i/os from writeback too. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/log.h')
-rw-r--r--fs/gfs2/log.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/gfs2/log.h b/fs/gfs2/log.h
index 3fd5215..3566f35 100644
--- a/fs/gfs2/log.h
+++ b/fs/gfs2/log.h
@@ -48,6 +48,18 @@ static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
sdp->sd_log_head = sdp->sd_log_tail = value;
}
+static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+
+ if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
+ spin_lock(&sdp->sd_ordered_lock);
+ if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
+ list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
+ spin_unlock(&sdp->sd_ordered_lock);
+ }
+}
+extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
unsigned int ssize);
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