From 20633f042fd0907300069714b98aaf607a8b5bf8 Mon Sep 17 00:00:00 2001 From: Weston Andros Adamson Date: Thu, 15 May 2014 11:56:47 -0400 Subject: 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 Signed-off-by: Trond Myklebust --- include/linux/nfs_page.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/nfs_page.h') diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h index 6385175a127b..7d9096d95d4a 100644 --- a/include/linux/nfs_page.h +++ b/include/linux/nfs_page.h @@ -31,6 +31,8 @@ enum { PG_TEARDOWN, /* page group sync for destroy */ PG_UNLOCKPAGE, /* page group sync bit in read path */ PG_UPTODATE, /* page group sync bit in read path */ + PG_WB_END, /* page group sync bit in write path */ + PG_REMOVE, /* page group sync bit in write path */ }; struct nfs_inode; -- cgit v1.2.3