linux-kernel - Re: [PATCH 0/3] fs/sysv: stop using write_supers and s

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Message-ID: <1342104572.18274.108.camel@sauron.fi.intel.com>
Date:	Thu, 12 Jul 2012 17:49:32 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Al Viro <viro@...IV.linux.org.uk>,
	Linux Kernel Maling List <linux-kernel@...r.kernel.org>,
	Linux FS Maling List <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 0/3] fs/sysv: stop using write_supers and s_dirt

On Thu, 2012-07-12 at 17:37 +0300, Artem Bityutskiy wrote:
> On Tue, 2012-07-03 at 16:43 +0300, Artem Bityutskiy wrote:
> > This patch-set makes sysv file-system stop using the VFS '->write_supers()'
> > call-back and the '->s_dirt' superblock field because I plan to remove them
> > once all users are gone.
> 
> Hi Andrew,
> 
> would you please pick this patch-set as well? I also sent you an update
> for hfs and hfsplus file-systems today - found a bug while doing some
> more testing. Also, I sent UFS changes today, very similar. Most
> probably no one will reply and I hope you would pick them as well.

Just to let you know about the overall picture. Pending FSes (no one
picked them) are:

1. ext4 - Ted is still being busy.
2. sysv, ufs - I hope you'd pick

After this we will be able to kill sync_supers() completely and get rid
of another source of regular wake-ups in the kernel. And interestingly,
it will be the final end of pdflush - at old times it woke up
periodically and flushed everything (forked itself as well). Then Jens
cut off the data write-back part and put it to per-block device bdi
threads. They originally also waked-up every 5 seconds, but I fixed this
in v2.6.36 (6467716) and they stopped misbehaving. Jens transformed the
superblock write-out part of pdflush 'sync_supers()', and I could not
kill it because I did not have enough time and Al's request to change
all users sounded unrealistic to me. But now I hope to actually finish
this.

-- 
Best Regards,
Artem Bityutskiy

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