From mboxrd@z Thu Jan  1 00:00:00 1970
From: "J. R. Okajima" <hooanon05@yahoo.co.jp>
Subject: Re: [PATCH] fs: Work around NFS wreckage
Date: Thu, 13 Jan 2011 23:10:45 +0900
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Cc: 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>
To: Thomas Gleixner <tglx@linutronix.de>
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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?


J. R. Okajima