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authorSteven Whitehouse <swhiteho@redhat.com>2012-10-31 10:37:10 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2012-11-07 13:33:17 +0000
commit9dbe9610b9df4efe0946299804ed46bb8f91dec2 (patch)
tree8d54797420ed9d0aef1c6bdd8f3b8dd5e9938d0a /fs/gfs2/inode.c
parentc9aecf73717f55e41ac11682a50bef8594547025 (diff)
downloadlinux-9dbe9610b9df4efe0946299804ed46bb8f91dec2.tar.bz2
GFS2: Add Orlov allocator
Just like ext3, this works on the root directory and any directory with the +T flag set. Also, just like ext3, any subdirectory created in one of the just mentioned cases will be allocated to a random resource group (GFS2 equivalent of a block group). If you are creating a set of directories, each of which will contain a job running on a different node, then by setting +T on the parent directory before creating the subdirectories, each will land up in a different resource group, and thus resource group contention between nodes will be kept to a minimum. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 749b05a960ef..ef3ce00bb528 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -385,13 +385,13 @@ static void munge_mode_uid_gid(const struct gfs2_inode *dip,
inode->i_gid = current_fsgid();
}
-static int alloc_dinode(struct gfs2_inode *ip)
+static int alloc_dinode(struct gfs2_inode *ip, u32 flags)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
int error;
int dblocks = 1;
- error = gfs2_inplace_reserve(ip, RES_DINODE);
+ error = gfs2_inplace_reserve(ip, RES_DINODE, flags);
if (error)
goto out;
@@ -560,7 +560,7 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
if (error)
goto fail_quota_locks;
- error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres);
+ error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0);
if (error)
goto fail_quota_locks;
@@ -650,6 +650,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
struct gfs2_glock *io_gl;
int error;
struct buffer_head *bh = NULL;
+ u32 aflags = 0;
if (!name->len || name->len > GFS2_FNAMESIZE)
return -ENAMETOOLONG;
@@ -685,7 +686,11 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
munge_mode_uid_gid(dip, inode);
ip->i_goal = dip->i_goal;
- error = alloc_dinode(ip);
+ if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) ||
+ (dip->i_diskflags & GFS2_DIF_TOPDIR))
+ aflags |= GFS2_AF_ORLOV;
+
+ error = alloc_dinode(ip, aflags);
if (error)
goto fail_free_inode;
@@ -897,7 +902,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
if (error)
goto out_gunlock;
- error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres);
+ error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0);
if (error)
goto out_gunlock_q;
@@ -1378,7 +1383,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
if (error)
goto out_gunlock;
- error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres);
+ error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres, 0);
if (error)
goto out_gunlock_q;