From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f48.google.com (mail-wm0-f48.google.com [74.125.82.48]) by kanga.kvack.org (Postfix) with ESMTP id ED2696B025A for ; Fri, 4 Dec 2015 11:10:05 -0500 (EST) Received: by wmvv187 with SMTP id v187so81481847wmv.1 for ; Fri, 04 Dec 2015 08:10:05 -0800 (PST) Received: from gum.cmpxchg.org (gum.cmpxchg.org. [85.214.110.215]) by mx.google.com with ESMTPS id ge7si19390358wjc.227.2015.12.04.08.10.04 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 04 Dec 2015 08:10:04 -0800 (PST) Date: Fri, 4 Dec 2015 11:09:52 -0500 From: Johannes Weiner Subject: Re: [PATCH v2 1/2] mm: Export nr_swap_pages Message-ID: <20151204160952.GA24927@cmpxchg.org> References: <1449244734-25733-1-git-send-email-chris@chris-wilson.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1449244734-25733-1-git-send-email-chris@chris-wilson.co.uk> Sender: owner-linux-mm@kvack.org List-ID: To: Chris Wilson Cc: intel-gfx@lists.freedesktop.org, "Goel, Akash" , linux-mm@kvack.org On Fri, Dec 04, 2015 at 03:58:53PM +0000, Chris Wilson wrote: > Some modules, like i915.ko, use swappable objects and may try to swap > them out under memory pressure (via the shrinker). Before doing so, they > want to check using get_nr_swap_pages() to see if any swap space is > available as otherwise they will waste time purging the object from the > device without recovering any memory for the system. This requires the > nr_swap_pages counter to be exported to the modules. > > Signed-off-by: Chris Wilson > Cc: "Goel, Akash" > Cc: Johannes Weiner > Cc: linux-mm@kvack.org Acked-by: Johannes Weiner -- 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