From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 16 Dec 2004 19:31:43 -0800 (PST) From: Christoph Lameter Subject: Re: page fault scalability patch V12 [0/7]: Overview and performance tests In-Reply-To: <20041212212456.GB2714@holomorphy.com> Message-ID: References: <41BBF923.6040207@yahoo.com.au> <20041212212456.GB2714@holomorphy.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: William Lee Irwin III Cc: Hugh Dickins , Nick Piggin , Linus Torvalds , Andrew Morton , Benjamin Herrenschmidt , linux-mm@kvack.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org List-ID: On Sun, 12 Dec 2004, William Lee Irwin III wrote: > On Sun, Dec 12, 2004 at 09:33:11AM +0000, Hugh Dickins wrote: > > Oh, hold on, isn't handle_mm_fault's pmd without page_table_lock > > similarly racy, in both the 64-on-32 cases, and on architectures > > which have a more complex pmd_t (sparc, m68k, h8300)? Sigh. > > yes. Those may fall back to use the page_table_lock for individual operations that cannot be realized in an atomic way. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org