linux-kernel - Re: [PATCH mmotm] xfs: needs LIST

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Message-ID: <20100304003153.GD14317@discord.disaster>
Date:	Thu, 4 Mar 2010 11:31:53 +1100
From:	Dave Chinner <david@...morbit.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Alex Elder <aelder@....com>, xfs-masters@....sgi.com
Subject: Re: [PATCH mmotm] xfs: needs LIST_SORT

On Wed, Mar 03, 2010 at 03:35:13PM -0800, Randy Dunlap wrote:
> On 03/03/10 15:25, Dave Chinner wrote:
> > On Wed, Mar 03, 2010 at 11:15:17AM -0800, Randy Dunlap wrote:
> >> From: Randy Dunlap <randy.dunlap@...cle.com>
> >>
> >> xfs uses list_sort (library function), so it needs to select it.
> >> Fixes these build errors:
> >> fs/xfs/linux-2.6/xfs_buf.c:1918: undefined reference to `list_sort'
> >> fs/xfs/linux-2.6/xfs_buf.c:1996: undefined reference to `list_sort'
> >> fs/xfs/linux-2.6/xfs_buf.c:1950: undefined reference to `list_sort'
> >>
> >> Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
> >> ---
> >>  fs/xfs/Kconfig |    1 +
> >>  1 file changed, 1 insertion(+)
> >>
> >> --- mmotm-2010-0302-1838.orig/fs/xfs/Kconfig
> >> +++ mmotm-2010-0302-1838/fs/xfs/Kconfig
> >> @@ -2,6 +2,7 @@ config XFS_FS
> >>  	tristate "XFS filesystem support"
> >>  	depends on BLOCK
> >>  	select EXPORTFS
> >> +	select LIST_SORT
> >>  	help
> >>  	  XFS is a high performance journaling filesystem which originated
> >>  	  on the SGI IRIX platform.  It is completely multi-threaded, can
> > 
> > Looks OK, but when and why did a config option get introduced for
> > this?
> 
> no idea.

Hmmm - google finds it easily enough. It was the third patch in the
second version of the list_sort() optimise series. I don't recall
seeing that version and I can't find it in my archives, so maybe
it got dropped somewhere along the way to me. <shrug>

> > FWIW, did UBIFS and DRM also get this select line added to them?
> 
> I just checked and both of those already select LIST_SORT.
> (in -mmotm)

Thanks for checking, Randy.

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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