Re: [PATCH 02/11] writeback: switch to per-bdi threads for flushing data

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Hi,

On 20 May 2009, at 13:49, Jens Axboe wrote:
On Wed, May 20 2009, Christoph Hellwig wrote:
Can you run the hunk below past Anton and get it upstream separately?
The code does indeed looks extremly fishy, but I'd rather not see it
go in a large unrelated patch..

Yes, it really should go out of this patchset and into a prep patch.
Anton, care to comment?

On Mon, May 18, 2009 at 02:19:43PM +0200, Jens Axboe wrote:
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index f76951d..c4cb157 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2373,39 +2373,13 @@ static void ntfs_put_super(struct super_block *sb)
		vol->mftmirr_ino = NULL;
	}
	/*
- * If any dirty inodes are left, throw away all mft data page cache - * pages to allow a clean umount. This should never happen any more - * due to mft.c::ntfs_mft_writepage() cleaning all the dirty pages as - * the underlying mft records are written out and cleaned. If it does,
+	 * We should have no dirty inodes left, due to
+	 * mft.c::ntfs_mft_writepage() cleaning all the dirty pages as
+	 * the underlying mft records are written out and cleaned.
	 * happen anyway, we want to know...

You need to remove the above line, too. It does not make sense to leave half a sentence there...

Otherwise you can apply this patch if you really want. It is just a debug/bandaid. I used to have problems where dirty inodes were left and I had put that in to allow the unmount to succeed properly. I believe that should not happen any more as explained in the comment above but I left the fixup code as a sanity check that would produce output to the system log that people would hopefully report should my fix not be correct/sufficient...

Best regards,

Anton



	 */
	ntfs_commit_inode(vol->mft_ino);
	write_inode_now(vol->mft_ino, 1);
-	if (sb_has_dirty_inodes(sb)) {
-		const char *s1, *s2;
-
-		mutex_lock(&vol->mft_ino->i_mutex);
-		truncate_inode_pages(vol->mft_ino->i_mapping, 0);
-		mutex_unlock(&vol->mft_ino->i_mutex);
-		write_inode_now(vol->mft_ino, 1);
-		if (sb_has_dirty_inodes(sb)) {
-			static const char *_s1 = "inodes";
-			static const char *_s2 = "";
-			s1 = _s1;
-			s2 = _s2;
-		} else {
-			static const char *_s1 = "mft pages";
-			static const char *_s2 = "They have been thrown "
-					"away.  ";
-			s1 = _s1;
-			s2 = _s2;
-		}
-		ntfs_error(sb, "Dirty %s found at umount time.  %sYou should "
-				"run chkdsk.  Please email "
-				"linux-ntfs-dev@xxxxxxxxxxxxxxxxxxxxx and say "
-				"that you saw this message.  Thank you.", s1,
-				s2);
-	}
#endif /* NTFS_RW */

	iput(vol->mft_ino);

--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/

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