diff options
| -rw-r--r-- | fs/nfs/pagelist.c | 44 |
1 files changed, 20 insertions, 24 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 5344371a257..7913961aff2 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -204,6 +204,21 @@ nfs_wait_on_request(struct nfs_page *req) TASK_UNINTERRUPTIBLE); } +static bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, struct nfs_page *prev, struct nfs_page *req) +{ + /* + * FIXME: ideally we should be able to coalesce all requests + * that are not block boundary aligned, but currently this + * is problematic for the case of bsize < PAGE_CACHE_SIZE, + * since nfs_flush_multi and nfs_pagein_multi assume you + * can have only one struct nfs_page. + */ + if (desc->pg_bsize < PAGE_SIZE) + return 0; + + return desc->pg_count + req->wb_bytes <= desc->pg_bsize; +} + /** * nfs_pageio_init - initialise a page io descriptor * @desc: pointer to descriptor @@ -229,7 +244,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc, desc->pg_ioflags = io_flags; desc->pg_error = 0; desc->pg_lseg = NULL; - desc->pg_test = NULL; + desc->pg_test = nfs_generic_pg_test; pnfs_pageio_init(desc, inode); } @@ -260,13 +275,7 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev, return false; if (prev->wb_pgbase + prev->wb_bytes != PAGE_CACHE_SIZE) return false; - /* - * Non-whole file layouts need to check that req is inside of - * pgio->pg_lseg. - */ - if (pgio->pg_test && !pgio->pg_test(pgio, prev, req)) - return false; - return true; + return pgio->pg_test(pgio, prev, req); } /** @@ -280,31 +289,18 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev, static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc, struct nfs_page *req) { - size_t newlen = req->wb_bytes; - if (desc->pg_count != 0) { struct nfs_page *prev; - /* - * FIXME: ideally we should be able to coalesce all requests - * that are not block boundary aligned, but currently this - * is problematic for the case of bsize < PAGE_CACHE_SIZE, - * since nfs_flush_multi and nfs_pagein_multi assume you - * can have only one struct nfs_page. - */ - if (desc->pg_bsize < PAGE_SIZE) - return 0; - newlen += desc->pg_count; - if (newlen > desc->pg_bsize) - return 0; prev = nfs_list_entry(desc->pg_list.prev); if (!nfs_can_coalesce_requests(prev, req, desc)) return 0; - } else + } else { desc->pg_base = req->wb_pgbase; + } nfs_list_remove_request(req); nfs_list_add_request(req, &desc->pg_list); - desc->pg_count = newlen; + desc->pg_count += req->wb_bytes; return 1; } |