[3/4] 9pfs: Fix filesystem to wait for stable page writeback

Submitted by Jan Kara on Dec. 17, 2012, 10:11 a.m.

Details

Message ID 20121217101130.GG5133@quack.suse.cz
State Accepted, archived
Headers show

Commit Message

Jan Kara Dec. 17, 2012, 10:11 a.m.
On Thu 13-12-12 00:08:02, Darrick J. Wong wrote:
> Fix up the ->page_mkwrite handler to provide stable page writes if necessary.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
  Looks good. Also UBIFS and OCFS2 seem to need similar treatment. Patches
attached...

									Honza
> ---
>  fs/9p/vfs_file.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> 
> diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
> index c2483e9..357260b 100644
> --- a/fs/9p/vfs_file.c
> +++ b/fs/9p/vfs_file.c
> @@ -620,6 +620,7 @@ v9fs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
>  	lock_page(page);
>  	if (page->mapping != inode->i_mapping)
>  		goto out_unlock;
> +	wait_for_stable_page(page);
>  
>  	return VM_FAULT_LOCKED;
>  out_unlock:
>

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From 988439f828b24fba8784cbd4d713d87cabd807cf Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Mon, 17 Dec 2012 11:08:11 +0100
Subject: [PATCH 2/2] ubifs: Wait for page writeback to provide stable pages

When stable pages are required, we have to wait if the page is just
going to disk and we want to modify it. Add proper callback to
ubifs_vm_page_mkwrite().

CC: Artem Bityutskiy <dedekind1@gmail.com>
CC: Adrian Hunter <adrian.hunter@intel.com>
CC: linux-mtd@lists.infradead.org
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/ubifs/file.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 5bc7781..4f6493c 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1522,6 +1522,7 @@  static int ubifs_vm_page_mkwrite(struct vm_area_struct *vma,
 			ubifs_release_dirty_inode_budget(c, ui);
 	}
 
+	wait_for_stable_page(page);
 	unlock_page(page);
 	return 0;
 
-- 
1.7.1