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authorBob Peterson <rpeterso@redhat.com>2012-06-06 11:17:59 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2012-06-06 11:17:59 +0100
commit0a305e496059a113f93bdd3ad27a5aaa917fe34d (patch)
treeb0b6ce3997fef4c4e28f598a98e2e08c939414a6 /fs/gfs2/trans.h
parenteea5b5510fc5545d15b69da8e485a7424ae388cf (diff)
downloadop-kernel-dev-0a305e496059a113f93bdd3ad27a5aaa917fe34d.zip
op-kernel-dev-0a305e496059a113f93bdd3ad27a5aaa917fe34d.tar.gz
GFS2: Extend the life of the reservations
This patch lengthens the lifespan of the reservations structure for inodes. Before, they were allocated and deallocated for every write operation. With this patch, they are allocated when the first write occurs, and deallocated when the last process closes the file. It's more efficient to do it this way because it saves GFS2 a lot of unnecessary allocates and frees. It also gives us more flexibility for the future: (1) we can now fold the qadata structure back into the structure and save those alloc/frees, (2) we can use this for multi-block reservations. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/trans.h')
-rw-r--r--fs/gfs2/trans.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/trans.h b/fs/gfs2/trans.h
index 125d457..41f42cd 100644
--- a/fs/gfs2/trans.h
+++ b/fs/gfs2/trans.h
@@ -31,7 +31,7 @@ struct gfs2_glock;
static inline unsigned int gfs2_rg_blocks(const struct gfs2_inode *ip)
{
const struct gfs2_blkreserv *rs = ip->i_res;
- if (rs->rs_requested < ip->i_rgd->rd_length)
+ if (rs && rs->rs_requested < ip->i_rgd->rd_length)
return rs->rs_requested + 1;
return ip->i_rgd->rd_length;
}
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