From: Erez Zadok <ezk@cs.sunysb.edu>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
viro@ftp.linux.org.uk, hch@infradead.org,
Erez Zadok <ezk@cs.sunysb.edu>, Hugh Dickins <hugh@veritas.com>
Subject: [PATCH 14/16] Unionfs: prevent multiple writers to lower_page
Date: Mon, 26 Nov 2007 11:44:11 -0500 [thread overview]
Message-ID: <11960954592000-git-send-email-ezk@cs.sunysb.edu> (raw)
In-Reply-To: <11960954531503-git-send-email-ezk@cs.sunysb.edu>
Without this patch, the LTP fs test "rwtest04" triggers a
BUG_ON(PageWriteback(page)) in fs/buffer.c:1706.
CC: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---
fs/unionfs/mmap.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/fs/unionfs/mmap.c b/fs/unionfs/mmap.c
index 623a913..ea5ef3d 100644
--- a/fs/unionfs/mmap.c
+++ b/fs/unionfs/mmap.c
@@ -73,6 +73,7 @@ static int unionfs_writepage(struct page *page, struct writeback_control *wbc)
BUG_ON(!lower_mapping->a_ops->writepage);
clear_page_dirty_for_io(lower_page); /* emulate VFS behavior */
+ wait_on_page_writeback(lower_page); /* prevent multiple writers */
err = lower_mapping->a_ops->writepage(lower_page, wbc);
if (err < 0)
goto out_release;
--
1.5.2.2
next prev parent reply other threads:[~2007-11-26 16:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-26 16:43 [GIT PULL -mm] 00/16 Unionfs updates/fixes/cleanups Erez Zadok
2007-11-26 16:43 ` [PATCH 01/16] Unionfs: use f_path instead of f_dentry/mnt Erez Zadok
2007-11-26 16:43 ` [PATCH 02/16] Unionfs: minor cleanup in writepage Erez Zadok
2007-11-26 16:44 ` [PATCH 03/16] Unionfs: minor coding standards applied Erez Zadok
2007-11-26 16:44 ` [PATCH 04/16] Unionfs: minor cleanup in the debugging infrastructure Erez Zadok
2007-11-26 16:44 ` [PATCH 05/16] Unionfs: set lower mnt after mkdir which resulted in copyup Erez Zadok
2007-11-26 16:44 ` [PATCH 06/16] Unionfs: handle whiteouts more efficiently in filldir Erez Zadok
2007-11-26 16:44 ` [PATCH 07/16] Unionfs: remove useless debugging messages Erez Zadok
2007-11-26 16:44 ` [PATCH 08/16] Unionfs: release lower resources on successful rmdir Erez Zadok
2007-11-26 16:44 ` [PATCH 09/16] Unionfs: don't create whiteouts on rightmost branch Erez Zadok
2007-11-26 16:44 ` [PATCH 10/16] Unionfs: create opaque directories' whiteouts unconditionally Erez Zadok
2007-11-26 16:44 ` [PATCH 11/16] Unionfs: update times in setattr Erez Zadok
2007-11-26 16:44 ` [PATCH 12/16] Unionfs: reintroduce a bmap method Erez Zadok
2007-11-26 16:44 ` [PATCH 13/16] Unionfs: support splice(2) Erez Zadok
2007-11-26 16:44 ` Erez Zadok [this message]
2007-11-26 16:44 ` [PATCH 15/16] Unionfs: update our inode size correctly upon partial write Erez Zadok
2007-11-26 16:44 ` [PATCH 16/16] Unionfs: use generic_file_aio_read/write Erez Zadok
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=11960954592000-git-send-email-ezk@cs.sunysb.edu \
--to=ezk@cs.sunysb.edu \
--cc=akpm@linux-foundation.org \
--cc=hch@infradead.org \
--cc=hugh@veritas.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=viro@ftp.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).