From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: "J. R. Okajima" <hooanon05@yahoo.co.jp>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Nick Piggin <npiggin@kernel.dk>,
LKML <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, "Ramirez Luna,
Omar" <omar.ramirez@ti.com>
Subject: Re: [PATCH] fs: Work around NFS wreckage
Date: Thu, 13 Jan 2011 16:17:36 +0100 [thread overview]
Message-ID: <20110113151736.GW24920@pengutronix.de> (raw)
In-Reply-To: <8952.1294927845@jrobl>
Hello,
On Thu, Jan 13, 2011 at 11:10:45PM +0900, 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?
If you tell me how to test that, I volunteer to try.
Something involving pivot_root?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2011-01-13 15:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 13:54 [PATCH] fs: Work around NFS wreckage Thomas Gleixner
2011-01-13 14:10 ` J. R. Okajima
2011-01-13 15:17 ` Uwe Kleine-König [this message]
2011-01-14 1:30 ` J. R. Okajima
2011-01-13 16:41 ` Thomas Gleixner
2011-01-14 1:01 ` Nick Piggin
2011-01-14 9:29 ` Thomas Gleixner
2011-01-14 9:47 ` Sedat Dilek
2011-01-14 15:47 ` Linus Torvalds
2011-01-14 16:40 ` Thomas Gleixner
2011-01-14 21:44 ` Nick Piggin
2011-01-13 14:12 ` Uwe Kleine-König
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