linux-kernel - Re: [GIT PULL] a few writeback fixes

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Date:	Mon, 21 Sep 2009 21:02:19 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>, jack@...e.cz,
	fengguang.wu@...el.com
Subject: Re: [GIT PULL] a few writeback fixes

On Mon, Sep 21 2009, Ingo Molnar wrote:
> 
> * Jens Axboe <jens.axboe@...cle.com> wrote:
> 
> > Hi Linus,
> > 
> > This fixes a problem with NFS killing its bdi without being 
> > initialized, and also contains a fix for a busy loop (where we forgot 
> > to set the task state before sleeping). Since these are a bit critical 
> > for -rc1, I'm pushing them out before leaving for Portland.
> > 
> > Jan, since we're not really sure on the inode wait yet, I dropped that 
> > patch. It's definitely something to look into, as are the congestion 
> > bits.
> > 
> > I plan on adding some writeback tracing code while on the plane for 
> > further analysis when I get back.
> > 
> >   git://git.kernel.dk/linux-2.6-block.git writeback
> > 
> > Jens Axboe (4):
> >       nfs: nfs_kill_super() should call bdi_unregister() after killing super
> >       writeback: don't use schedule_timeout() without setting runstate
> >       writeback: make balance_dirty_pages() gradually back more off
> >       nfs: initialize the backing_dev_info when creating the server
> > 
> >  fs/nfs/client.c     |   10 ++++++----
> >  fs/nfs/super.c      |    2 +-
> >  mm/page-writeback.c |   11 ++++++++++-
> >  3 files changed, 17 insertions(+), 6 deletions(-)
> 
> just an update about the BDI slab corruption bugs i reported in this 
> thread on lkml:
> 
>    [origin tree SLAB corruption] BUG kmalloc-64: Poison overwritten,
>         INFO: Allocated in bdi_alloc_work+0x2b/0x100 age=175 cpu=1 pid=3514
> 
> They have gone away entirely with your earlier BDI fixes/updates, on all 
> -tip testsystems that triggered it. So that bug can be closed for good.

That's good, I was expecting Nicks fixes to resolve those. Thanks for
confirming!

-- 
Jens Axboe

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