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From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Brian Foster <bfoster@redhat.com>, xfs@oss.sgi.com
Subject: Re: [PATCH 06/13] xfs: xfs_sync_data is redundant.
Date: Wed, 3 Oct 2012 06:24:56 +1000	[thread overview]
Message-ID: <20121002202456.GR23520@dastard> (raw)
In-Reply-To: <20121002132205.GA14572@infradead.org>

On Tue, Oct 02, 2012 at 09:22:05AM -0400, Christoph Hellwig wrote:
> On Tue, Oct 02, 2012 at 10:10:22AM +1000, Dave Chinner wrote:
> > diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
> > index da69c18..0ec7a46 100644
> > --- a/fs/xfs/xfs_inode.h
> > +++ b/fs/xfs/xfs_inode.h
> > @@ -294,7 +294,7 @@ xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
> >  static inline void
> >  xfs_flush_inodes(struct xfs_inode *ip)
> >  {
> > -	writeback_inodes_sb_if_idle(VFS_I(ip)->i_sb, WB_REASON_FS_FREE_SPACE);
> > +	sync_inodes_sb(VFS_I(ip)->i_sb);
> 
> sync_inodes_sb needs s_umount held and asserts that, while our callers
> usually won't have it.

Ah, bugger. I didn't notice that, and hadn't checked dmesg after I
ran 273 a few times with this patch. I just figured that because it
waited for completion, it didn't need it.

Adding s_umount is fine for the wirte path, but the create path
holds a directory i_mutex so I'd guess that means it has to be a
trylock to avoid lock inversion warnings from lockdep....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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  reply	other threads:[~2012-10-02 20:23 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-28  4:44 [PATCH V3 00/13] xfs: remove the xfssyncd mess Dave Chinner
2012-09-28  4:44 ` [PATCH 01/13] xfs: xfs_syncd_stop must die Dave Chinner
2012-09-28  4:44 ` [PATCH 02/13] xfs: rationalise xfs_mount_wq users Dave Chinner
2012-09-28 12:27   ` Christoph Hellwig
2012-09-28  4:44 ` [PATCH 03/13] xfs: don't run the sync work if the filesystem is read-only Dave Chinner
2012-09-28 12:27   ` Christoph Hellwig
2012-09-28  4:44 ` [PATCH 04/13] xfs: sync work is now only periodic log work Dave Chinner
2012-09-28 12:31   ` Christoph Hellwig
2012-09-28  4:44 ` [PATCH 05/13] xfs: Bring some sanity to log unmounting Dave Chinner
2012-09-28  4:44 ` [PATCH 06/13] xfs: xfs_sync_data is redundant Dave Chinner
2012-09-28 12:34   ` Christoph Hellwig
2012-10-01 17:44     ` Ben Myers
2012-10-02  0:14       ` Dave Chinner
2012-10-02 19:39         ` Ben Myers
2012-09-28 21:44   ` Mark Tinguely
2012-10-01 20:14   ` Brian Foster
2012-10-01 21:31     ` Mark Tinguely
2012-10-02  0:10     ` Dave Chinner
2012-10-02  0:44       ` Brian Foster
2012-10-02 13:01         ` Brian Foster
2012-10-02 20:51           ` Dave Chinner
2012-10-02 21:13             ` Brian Foster
2012-10-04  0:05             ` Ben Myers
2012-10-04  1:07               ` Dave Chinner
2012-10-02 13:22       ` Christoph Hellwig
2012-10-02 20:24         ` Dave Chinner [this message]
2012-10-02 20:25     ` Ben Myers
2012-09-28  4:44 ` [PATCH 07/13] xfs: syncd workqueue is no more Dave Chinner
2012-09-28 12:35   ` Christoph Hellwig
2012-09-28 18:17   ` Mark Tinguely
2012-10-01 17:54     ` Ben Myers
2012-09-28  4:44 ` [PATCH 08/13] xfs: xfs_sync_fsdata is redundant Dave Chinner
2012-09-28  4:44 ` [PATCH 09/13] xfs: move xfs_quiesce_attr() into xfs_super.c Dave Chinner
2012-09-28  4:44 ` [PATCH 10/13] xfs: xfs_quiesce_attr() should quiesce the log like unmount Dave Chinner
2012-09-28  4:44 ` [PATCH 11/13] xfs: rename xfs_sync.[ch] to xfs_icache.[ch] Dave Chinner
2012-09-28  4:44 ` [PATCH 12/13] xfs: move inode locking functions to xfs_inode.c Dave Chinner
2012-09-28  4:44 ` [PATCH 13/13] xfs: remove xfs_iget.c Dave Chinner

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