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Date: Fri, 14 Jan 2011 10:29:54 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: Nick Piggin <npiggin@gmail.com>
cc: "J. R. Okajima" <hooanon05@yahoo.co.jp>, Nick Piggin <npiggin@kernel.dk>,
        LKML <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-fsdevel@vger.kernel.org, u.kleine-koenig@pengutronix.de,
        "Ramirez Luna, Omar" <omar.ramirez@ti.com>
Subject: Re: [PATCH] fs: Work around NFS wreckage
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On Fri, 14 Jan 2011, Nick Piggin wrote:

> On Fri, Jan 14, 2011 at 3:41 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > On Thu, 13 Jan 2011, J. R. Okajima wrote:
> >> Thomas Gleixner:
> >> > The dcache scalability work broke NFS root filesystems.
> >>       :::
> >> > Check for parent equal dentry and skip the nested lock to avoid the
> >> > deadlock. I'm sure this is the wrong fix, but at least it "works" :)
> >>
> >> With this patch, can you unmount it cleanly?
> >> It skips incrementing d_count for both dentries.
> >> Do we need at least one?
> >
> 
> Yeah thanks everyone for reporting this.
> 
> I have a fix for it in a slightly different way, and a couple of other reported
> bugs, which are going through stress testing now.

Can you point us to the patches, so we can run our own set of
tests in paralell?

Thanks,

	tglx
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