linux-kernel - Re: hugetlb locking bug.

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Message-ID: <20110415211334.GA24870@infradead.org>
Date:	Fri, 15 Apr 2011 17:13:34 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	William Irwin <wli@...omorphy.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: hugetlb locking bug.

On Fri, Apr 15, 2011 at 11:09:26PM +0200, Peter Zijlstra wrote:
> Is there a sane reason they do their own magic, and thus need a copy of
> the logic, instead of using the generic code that already has it?

There is not need to use the inode hash for purely in-memory
filesystem.  The dcache tells us if an entry already exists,
so there is no need to a lru list, hash or other overhead.

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