Patchwork [2/3] fs: block_page_mkwrite should wait for writeback to finish

login
register
mail settings
Submitter Darrick J. Wong
Date May 19, 2011, 10:48 p.m.
Message ID <20110519224855.28755.2720.stgit@elm3c44.beaverton.ibm.com>
Download mbox | patch
Permalink /patch/96486/
State Not Applicable
Headers show

Comments

Darrick J. Wong - May 19, 2011, 10:48 p.m.
For filesystems such as nilfs2 and xfs that use block_page_mkwrite, modify that
function to wait for pending writeback before allowing the page to become
writable.  This is needed to stabilize pages during writeback for those two
filesystems.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
---
 fs/buffer.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)



--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch

diff --git a/fs/buffer.c b/fs/buffer.c
index a08bb8e..0e7fa16 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2367,8 +2367,10 @@  block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
 			ret = VM_FAULT_OOM;
 		else /* -ENOSPC, -EIO, etc */
 			ret = VM_FAULT_SIGBUS;
-	} else
+	} else {
+		wait_on_page_writeback(page);
 		ret = VM_FAULT_LOCKED;
+	}
 
 out:
 	return ret;