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| author | Steven Whitehouse <swhiteho@redhat.com> | 2013-12-06 16:19:54 +0000 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2014-01-03 10:01:50 +0000 |
| commit | 70d4ee94b370c5ef54d0870600f16bd92d18013c (patch) | |
| tree | ae741f94eba92bdb6e2882145de03be662557f66 /fs/gfs2/lops.c | |
| parent | 7005c3e4ae42858dbb695b2d03d340af799b1f1b (diff) | |
| download | blackbird-op-linux-70d4ee94b370c5ef54d0870600f16bd92d18013c.tar.gz blackbird-op-linux-70d4ee94b370c5ef54d0870600f16bd92d18013c.zip | |
GFS2: Use only a single address space for rgrps
Prior to this patch, GFS2 had one address space for each rgrp,
stored in the glock. This patch changes them to use a single
address space in the super block. This therefore saves
(sizeof(struct address_space) * nr_of_rgrps) bytes of memory
and for large filesystems, that can be significant.
It would be nice to be able to do something similar and merge
the inode metadata address space into the same global
address space. However, that is rather more complicated as the
on-disk location doesn't have a 1:1 mapping with the inodes in
general. So while it could be done, it will be a more complicated
operation as it requires changing a lot more code paths.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/lops.c')
| -rw-r--r-- | fs/gfs2/lops.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index cdadb92372f2..58f06400b7b8 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -589,8 +589,12 @@ static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, static void gfs2_meta_sync(struct gfs2_glock *gl) { struct address_space *mapping = gfs2_glock2aspace(gl); + struct gfs2_sbd *sdp = gl->gl_sbd; int error; + if (mapping == NULL) + mapping = &sdp->sd_aspace; + filemap_fdatawrite(mapping); error = filemap_fdatawait(mapping); |
