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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/rgrp.h
parentc9aecf73717f55e41ac11682a50bef8594547025 (diff)
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/rgrp.h')
-rw-r--r--fs/gfs2/rgrp.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h
index 24077958dcf..842185853f6 100644
--- a/fs/gfs2/rgrp.h
+++ b/fs/gfs2/rgrp.h
@@ -39,7 +39,8 @@ extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
-extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested);
+#define GFS2_AF_ORLOV 1
+extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested, u32 flags);
extern void gfs2_inplace_release(struct gfs2_inode *ip);
extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,