summaryrefslogtreecommitdiffstats
path: root/include/linux/nfs_page.h
diff options
context:
space:
mode:
authorFred Isaman <iisaman@netapp.com>2011-03-01 01:34:14 +0000
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-03-11 15:38:42 -0500
commit94ad1c80e28f9700c84b4d28d1e5302ddf63a6fd (patch)
tree2c600c1f8e85648c7693b5f0018b5d0b7e960b5f /include/linux/nfs_page.h
parentd684d2ae10a4f95d3035abf698d7d611ff2cd279 (diff)
NFSv4.1: coelesce across layout stripes
Add a pg_test layout driver hook which is used to avoid coelescing I/O across layout stripes. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Fred Isaman <iisaman@citi.umich.edu> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/nfs_page.h')
-rw-r--r--include/linux/nfs_page.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index d55cee73f63..4eaf27a1282 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -62,6 +62,8 @@ struct nfs_pageio_descriptor {
int (*pg_doio)(struct inode *, struct list_head *, unsigned int, size_t, int);
int pg_ioflags;
int pg_error;
+ struct pnfs_layout_segment *pg_lseg;
+ int (*pg_test)(struct nfs_pageio_descriptor *, struct nfs_page *, struct nfs_page *);
};
#define NFS_WBACK_BUSY(req) (test_bit(PG_BUSY,&(req)->wb_flags))