From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f69.google.com (mail-lf0-f69.google.com [209.85.215.69]) by kanga.kvack.org (Postfix) with ESMTP id 4D3216B0069 for ; Sat, 31 Dec 2016 00:08:51 -0500 (EST) Received: by mail-lf0-f69.google.com with SMTP id x140so80554219lfa.2 for ; Fri, 30 Dec 2016 21:08:51 -0800 (PST) Received: from mail-lf0-x22c.google.com (mail-lf0-x22c.google.com. [2a00:1450:4010:c07::22c]) by mx.google.com with ESMTPS id 142si20636080lfe.154.2016.12.30.21.08.49 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Dec 2016 21:08:49 -0800 (PST) Received: by mail-lf0-x22c.google.com with SMTP id t196so246301986lff.3 for ; Fri, 30 Dec 2016 21:08:49 -0800 (PST) From: Michal Nazarewicz Subject: Re: [PATCH] mm: Drop "PFNs busy" printk in an expected path. In-Reply-To: <87bmvtxizn.fsf@eliezer.anholt.net> References: <20161229023131.506-1-eric@anholt.net> <20161229091256.GF29208@dhcp22.suse.cz> <87wpeitzld.fsf@eliezer.anholt.net> <8737h65nr5.fsf@eliezer.anholt.net> <87bmvtxizn.fsf@eliezer.anholt.net> Date: Sat, 31 Dec 2016 06:08:45 +0100 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: Eric Anholt , Michal Hocko Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-stable , "Robin H. Johnson" , Vlastimil Babka , Marek Szyprowski On Fri, Dec 30 2016, Eric Anholt wrote: > OK, so the design is bad. When you said bug, I definitely thought you > were saying that the message shouldn't happen in the design. > > Given CMA's current design, should everyone using CMA see their logs > slowly growing with this message that is an secret code for "CMA's > design hasn't yet changed"? Just to be clear, it=E2=80=99s not CMA=E2=80=99s design; it=E2=80=99s movab= le page=E2=80=99s design that is bad (at least in the context of this discussion). But yes, because of the way movable pages are, everyone is likely to see the message. > If you want to have people be able to track how often this is > happening, let's make a perf event for it or something instead. Sure. --=20 Best regards =E3=83=9F=E3=83=8F=E3=82=A6 =E2=80=9C=F0=9D=93=B6=F0=9D=93=B2=F0=9D=93=B7= =F0=9D=93=AA86=E2=80=9D =E3=83=8A=E3=82=B6=E3=83=AC=E3=83=B4=E3=82=A4=E3=83= =84 =C2=ABIf at first you don=E2=80=99t succeed, give up skydiving=C2=BB -- 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