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author | Steven Whitehouse <swhiteho@redhat.com> | 2008-01-10 15:18:55 +0000 |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2008-01-25 08:18:25 +0000 |
commit | 6dbd822487d0a9f14432cb4680415b80656b63a2 (patch) | |
tree | f0391d598c27cd7c39c67cfa13799a784f4c389a /fs/gfs2/eattr.c | |
parent | ac39aadd0440ae696e6dacaa8006ce1737b17008 (diff) | |
download | kernel_samsung_smdk4412-6dbd822487d0a9f14432cb4680415b80656b63a2.zip kernel_samsung_smdk4412-6dbd822487d0a9f14432cb4680415b80656b63a2.tar.gz kernel_samsung_smdk4412-6dbd822487d0a9f14432cb4680415b80656b63a2.tar.bz2 |
[GFS2] Reduce inode size by moving i_alloc out of line
It is possible to reduce the size of GFS2 inodes by taking the i_alloc
structure out of the gfs2_inode. This patch allocates the i_alloc
structure whenever its needed, and frees it afterward. This decreases
the amount of low memory we use at the expense of requiring a memory
allocation for each page or partial page that we write. A quick test
with postmark shows that the overhead is not measurable and I also note
that OCFS2 use the same approach.
In the future I'd like to solve the problem by shrinking down the size
of the members of the i_alloc structure, but for now, this reduces the
immediate problem of using too much low-memory on x86 and doesn't add
too much overhead.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/eattr.c')
-rw-r--r-- | fs/gfs2/eattr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/eattr.c b/fs/gfs2/eattr.c index 2a7435b..bee9970 100644 --- a/fs/gfs2/eattr.c +++ b/fs/gfs2/eattr.c @@ -1418,7 +1418,7 @@ out: static int ea_dealloc_block(struct gfs2_inode *ip) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct gfs2_alloc *al = &ip->i_alloc; + struct gfs2_alloc *al = ip->i_alloc; struct gfs2_rgrpd *rgd; struct buffer_head *dibh; int error; |