diff options
| author | Benjamin Marzinski <bmarzins@redhat.com> | 2013-05-07 09:58:49 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2013-06-05 09:50:20 +0100 |
| commit | 7f63257da1aeea9b2ee68f469b0f9f4a39e5dff8 (patch) | |
| tree | 1280ffbf443083b54e197163b1fe7102a7102bd6 /fs | |
| parent | 844ce9f2044723a9da0f4bce588cca410e774d24 (diff) | |
GFS2: Sort buffer lists by inplace block number
This patch simply sort the data and metadata buffer lists by their
inplace block number. This makes gfs2_log_flush issue the inplace IO
in sequential order, which will hopefully speed up writing the IO
out to disk.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/lops.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 6c33d7b6e0c..cb017a692fe 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -16,6 +16,7 @@ #include <linux/gfs2_ondisk.h> #include <linux/bio.h> #include <linux/fs.h> +#include <linux/list_sort.h> #include "gfs2.h" #include "incore.h" @@ -401,6 +402,20 @@ static void gfs2_check_magic(struct buffer_head *bh) kunmap_atomic(kaddr); } +static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b) +{ + struct gfs2_bufdata *bda, *bdb; + + bda = list_entry(a, struct gfs2_bufdata, bd_list); + bdb = list_entry(b, struct gfs2_bufdata, bd_list); + + if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr) + return -1; + if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr) + return 1; + return 0; +} + static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, unsigned int total, struct list_head *blist, bool is_databuf) @@ -413,6 +428,7 @@ static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, __be64 *ptr; gfs2_log_lock(sdp); + list_sort(NULL, blist, blocknr_cmp); bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list); while(total) { num = total; |