From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id 98B426B0082 for ; Mon, 18 Jan 2010 15:41:45 -0500 (EST) From: "Rafael J. Wysocki" Subject: Re: [RFC][PATCH] PM: Force GFP_NOIO during suspend/resume (was: Re: [linux-pm] Memory allocations in .suspend became very unreliable) Date: Mon, 18 Jan 2010 21:41:49 +0100 References: <1263549544.3112.10.camel@maxim-laptop> <201001171455.55909.rjw@sisk.pl> <201001181800.38574.oliver@neukum.org> In-Reply-To: <201001181800.38574.oliver@neukum.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201001182141.49907.rjw@sisk.pl> Sender: owner-linux-mm@kvack.org To: Oliver Neukum Cc: Maxim Levitsky , linux-pm@lists.linux-foundation.org, LKML , linux-mm , Andrew Morton , Benjamin Herrenschmidt List-ID: On Monday 18 January 2010, Oliver Neukum wrote: > Am Sonntag, 17. Januar 2010 14:55:55 schrieb Rafael J. Wysocki: > > +void mm_force_noio_allocations(void) > > +{ > > + /* Wait for all slowpath allocations using the old mask to complete */ > > + down_write(&gfp_allowed_mask_sem); > > + saved_gfp_allowed_mask = gfp_allowed_mask; > > + gfp_allowed_mask &= ~(__GFP_IO | __GFP_FS); > > + up_write(&gfp_allowed_mask_sem); > > +} > > In addition to this you probably want to exhaust all memory reserves > before you fail a memory allocation I'm not really sure what you mean. > and forbid the OOM killer to run. The OOM killer has already been disabled at this point, by the freezer. 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