Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757735AbZCTIxR (ORCPT ); Fri, 20 Mar 2009 04:53:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756076AbZCTIwv (ORCPT ); Fri, 20 Mar 2009 04:52:51 -0400 Received: from casper.infradead.org ([85.118.1.10]:34113 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757329AbZCTIwu (ORCPT ); Fri, 20 Mar 2009 04:52:50 -0400 Subject: Re: question about pt locking From: Peter Zijlstra To: Shentino Cc: linux-kernel@vger.kernel.org In-Reply-To: <20090320081633.GA673@shentino-desktop> References: <20090320081633.GA673@shentino-desktop> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Fri, 20 Mar 2009 09:52:10 +0100 Message-Id: <1237539130.24626.43.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.24.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 484 Lines: 11 On Fri, 2009-03-20 at 01:16 -0700, Shentino wrote: > Just curious, but does a process effectively have a read-lock on its > page tables when it's in userland? No, page reclaim can fiddle with a running process' page tables concurrently. -- 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/