diff options
| author | Benny Halevy <bhalevy@panasas.com> | 2011-05-22 20:47:26 +0400 |
|---|---|---|
| committer | Boaz Harrosh <bharrosh@panasas.com> | 2011-05-29 21:52:32 +0400 |
| commit | fb3296eb4636763918edef2d22e45b85b15d4518 (patch) | |
| tree | 31c85255ccfa03cbca2d1e4e52028e489276a73b /fs/nfs/read.c | |
| parent | f7da7a129d57bfe0f74573dc03531c63e1360fae (diff) | |
| download | linux-fb3296eb4636763918edef2d22e45b85b15d4518.tar.xz | |
pnfs: Use byte-range for layoutget
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>
Diffstat (limited to 'fs/nfs/read.c')
| -rw-r--r-- | fs/nfs/read.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 2bcf0dc306a1..540c8bc93f95 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -288,7 +288,9 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc) atomic_set(&req->wb_complete, requests); BUG_ON(desc->pg_lseg != NULL); - lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ, GFP_KERNEL); + lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, + req_offset(req), desc->pg_count, + IOMODE_READ, GFP_KERNEL); ClearPageError(page); offset = 0; nbytes = desc->pg_count; @@ -351,7 +353,9 @@ static int nfs_pagein_one(struct nfs_pageio_descriptor *desc) } req = nfs_list_entry(data->pages.next); if ((!lseg) && list_is_singular(&data->pages)) - lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ, GFP_KERNEL); + lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, + req_offset(req), desc->pg_count, + IOMODE_READ, GFP_KERNEL); ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, desc->pg_count, 0, lseg); |