lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

pnfs: Use byte-range for layoutget

Browse Source 
Add offset and count parameters to pnfs_update_layout and use them to get
the layout in the pageio path.

Order cache layout segments in the following order:
* offset (ascending)
* length (descending)
* iomode (RW before READ)

Test byte range against the layout segment in use in pnfs_{read,write}_pg_test
so not to coalesce pages not using the same layout segment.

[fix lseg ordering]
[clean up pnfs_find_lseg lseg arg]
[remove unnecessary FIXME]
[fix ordering in pnfs_insert_layout]
[clean up pnfs_insert_layout]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
This commit is contained in:
Benny Halevy
2011-05-22 19:47:26 +03:00
committed by Boaz Harrosh
parent f7da7a129d
commit fb3296eb46
4 changed files with 142 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
fs/nfs/pnfs.h
View File

@@ -131,7 +131,8 @@ void get_layout_hdr(struct pnfs_layout_hdr *lo);
void put_lseg(struct pnfs_layout_segment *lseg);
struct pnfs_layout_segment *
pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
enum pnfs_iomode access_type, gfp_t gfp_flags);
loff_t pos, u64 count, enum pnfs_iomode access_type,
gfp_t gfp_flags);
void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
void unset_pnfs_layoutdriver(struct nfs_server *);
enum pnfs_try_status pnfs_try_to_write_data(struct nfs_write_data *,
@@ -271,7 +272,8 @@ static inline void put_lseg(struct pnfs_layout_segment *lseg)
static inline struct pnfs_layout_segment *
pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
enum pnfs_iomode access_type, gfp_t gfp_flags)
loff_t pos, u64 count, enum pnfs_iomode access_type,
gfp_t gfp_flags)
{
return NULL;
}