linux-kernel - Re: [patch] mm: fix lockless pagecache reordering bug (was Re: BUG: soft lockup

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Date:	Mon, 5 Jan 2009 18:29:41 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Nick Piggin <npiggin@...e.de>
cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Peter Klotz <peter.klotz@....at>, stable@...nel.org,
	Linux Memory Management List <linux-mm@...ck.org>,
	Christoph Hellwig <hch@...radead.org>,
	Roman Kononov <kernel@...onov.ftml.net>,
	linux-kernel@...r.kernel.org, xfs@....sgi.com,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch] mm: fix lockless pagecache reordering bug (was Re: BUG:
 soft lockup - is this XFS problem?)



On Tue, 6 Jan 2009, Nick Piggin wrote:
> 
> Sticking an rcu_dereference in radix_tree_deref_slot seems to fix the
> assembly for me too, I grafted the changelog onto that. Linus probably
> you are using -Os?

Ahh, yes. I am. That explains why I can't see any difference.

		Linus
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