From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id BDDA16B006A for ; Thu, 21 Jan 2010 16:38:45 -0500 (EST) From: "Rafael J. Wysocki" Subject: Re: [linux-pm] [RFC][PATCH] PM: Force GFP_NOIO =?iso-8859-1?q?during=09suspend/resume?= (was: Re: Memory allocations in =?iso-8859-1?q?=2Esuspend=09became_very?= unreliable) Date: Thu, 21 Jan 2010 22:38:47 +0100 References: <20100120085053.405A.A69D9226@jp.fujitsu.com> <201001212121.50272.rjw@sisk.pl> <4B58BC31.1040406@crca.org.au> In-Reply-To: <4B58BC31.1040406@crca.org.au> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201001212238.47471.rjw@sisk.pl> Sender: owner-linux-mm@kvack.org To: Nigel Cunningham Cc: KOSAKI Motohiro , LKML , linux-mm , linux-pm@lists.linux-foundation.org, Andrew Morton List-ID: On Thursday 21 January 2010, Nigel Cunningham wrote: > Hi. > > Rafael J. Wysocki wrote: > > On Thursday 21 January 2010, KOSAKI Motohiro wrote: > >> - Ask all drivers how much they require memory before starting suspend and > >> Make enough free memory at first? > > > > That's equivalent to reworking all drivers to allocate memory before suspend > > eg. with the help of PM notifiers. Which IMHO is unrealistic. > > What's unrealistic about it? I can see that it would be a lot of work, > but unrealistic? To me, at this stage, it sounds like the ideal solution. First, we'd need to audit the drivers which is quite a task by itself. Second, we'd need to make changes, preferably test them or find someone with suitable hardware to do that for us and propagate them upstream. I don't really think we have the time to do it. Rafael -- 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: email@kvack.org