From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [RFC][PATCH 2/9] deadlock prevention core Date: Sun, 13 Aug 2006 21:58:53 -0700 Message-ID: <20060813215853.0ed0e973.akpm@osdl.org> References: <20060808211731.GR14627@postel.suug.ch> <44DBED4C.6040604@redhat.com> <44DFA225.1020508@google.com> <20060813.165540.56347790.davem@davemloft.net> <44DFD262.5060106@google.com> <20060813185309.928472f9.akpm@osdl.org> <1155530453.5696.98.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Daniel Phillips , David Miller , riel@redhat.com, tgraf@suug.ch, linux-mm@kvack.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Mike Christie Return-path: Received: from smtp.osdl.org ([65.172.181.4]:22440 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1751850AbWHNFFk (ORCPT ); Mon, 14 Aug 2006 01:05:40 -0400 To: Peter Zijlstra In-Reply-To: <1155530453.5696.98.camel@twins> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Mon, 14 Aug 2006 06:40:53 +0200 Peter Zijlstra wrote: > Testcase: > > Mount an NBD device as sole swap device and mmap > physical RAM, then > loop through touching pages only once. Fix: don't try to swap over the network. Yes, there may be some scenarios where people have no local storage, but it's reasonable to expect anyone who is using Linux as an "enterprise storage platform" to stick a local disk on the thing for swap. That leaves MAP_SHARED, but mm-tracking-shared-dirty-pages.patch will fix that, will it not?