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authorWeston Andros Adamson <dros@primarydata.com>2014-05-15 11:56:47 -0400
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-05-29 11:11:45 -0400
commit20633f042fd0907300069714b98aaf607a8b5bf8 (patch)
tree33f23c3c0043376a6636367ec64c2962131c7dd9 /fs/nfs/pagelist.c
parent67d0338edd71db9a4f406d8778f7c525d31e9f7f (diff)
nfs: page group syncing in write path
Operations that modify state for a whole page must be syncronized across all requests within a page group. In the write path, this is calling end_page_writeback and removing the head request from an inode. Both of these operations should not be called until all requests in a page group have reached the point where they would call them. This patch should have no effect yet since all page groups currently have one request, but will come into play when pg_test functions are modified to split pages into sub-page regions. Signed-off-by: Weston Andros Adamson <dros@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/pagelist.c')
-rw-r--r--fs/nfs/pagelist.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 18ee4e99347e..ceb4424614aa 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -397,6 +397,8 @@ static void nfs_free_request(struct nfs_page *req)
397 WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags)); 397 WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags));
398 WARN_ON_ONCE(test_bit(PG_UNLOCKPAGE, &req->wb_flags)); 398 WARN_ON_ONCE(test_bit(PG_UNLOCKPAGE, &req->wb_flags));
399 WARN_ON_ONCE(test_bit(PG_UPTODATE, &req->wb_flags)); 399 WARN_ON_ONCE(test_bit(PG_UPTODATE, &req->wb_flags));
400 WARN_ON_ONCE(test_bit(PG_WB_END, &req->wb_flags));
401 WARN_ON_ONCE(test_bit(PG_REMOVE, &req->wb_flags));
400 402
401 /* Release struct file and open context */ 403 /* Release struct file and open context */
402 nfs_clear_request(req); 404 nfs_clear_request(req);