Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757160AbZJFQu1 (ORCPT ); Tue, 6 Oct 2009 12:50:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756855AbZJFQu0 (ORCPT ); Tue, 6 Oct 2009 12:50:26 -0400 Received: from smtp2.ultrahosting.com ([74.213.174.253]:34261 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752078AbZJFQu0 (ORCPT ); Tue, 6 Oct 2009 12:50:26 -0400 Date: Tue, 6 Oct 2009 12:43:33 -0400 (EDT) From: Christoph Lameter X-X-Sender: cl@gentwo.org To: nickpiggin@yahoo.com.au, Mathieu Desnoyers cc: akpm@linux-foundation.org, Ingo Molnar , linux-kernel@vger.kernel.org, "Paul E. McKenney" , linux-mm@kvack.org Subject: Re: [patch 4/4] vunmap: Fix racy use of rcu_head In-Reply-To: <20091006144043.378971387@polymtl.ca> Message-ID: References: <20091006143727.868480435@polymtl.ca> <20091006144043.378971387@polymtl.ca> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 607 Lines: 14 On Tue, 6 Oct 2009, Mathieu Desnoyers wrote: > Simplest fix: directly kfree the data structure rather than doing it lazily. The delay is necessary as far as I can tell for performance reasons. But Nick was the last one fiddling around with the subsystem as far as I remember. CCing him. May be he has a minute to think about a fix that preserved performance. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/