From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by kanga.kvack.org (Postfix) with ESMTP id DC9CB6B0006 for ; Fri, 27 Jul 2018 18:01:26 -0400 (EDT) Received: by mail-wr1-f69.google.com with SMTP id t5-v6so4226321wrq.14 for ; Fri, 27 Jul 2018 15:01:26 -0700 (PDT) Received: from atrey.karlin.mff.cuni.cz (atrey.karlin.mff.cuni.cz. [195.113.26.193]) by mx.google.com with ESMTPS id w68-v6si3865252wmw.169.2018.07.27.15.01.24 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 27 Jul 2018 15:01:24 -0700 (PDT) Date: Sat, 28 Jul 2018 00:01:23 +0200 From: Pavel Machek Subject: Re: [PATCH 0/10] psi: pressure stall information for CPU, memory, and IO v2 Message-ID: <20180727220123.GB18879@amd> References: <20180712172942.10094-1-hannes@cmpxchg.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="LpQ9ahxlCli8rRTG" Content-Disposition: inline In-Reply-To: <20180712172942.10094-1-hannes@cmpxchg.org> Sender: owner-linux-mm@kvack.org List-ID: To: Johannes Weiner Cc: Ingo Molnar , Peter Zijlstra , Andrew Morton , Linus Torvalds , Tejun Heo , Suren Baghdasaryan , Vinayak Menon , Christopher Lameter , Mike Galbraith , Shakeel Butt , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com --LpQ9ahxlCli8rRTG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > The idea is to eventually incorporate this back into the kernel, so > that Linux can avoid OOM livelocks (which TECHNICALLY aren't memory > deadlocks, but for the user indistinguishable) out of the box. >=20 > We also use psi memory pressure for loadshedding. Our batch job psi->PSI? > How do you use this feature? >=20 > A kernel with CONFIG_PSI=3Dy will create a /proc/pressure directory with > 3 files: cpu, memory, and io. If using cgroup2, cgroups will also Could we get the config named CONFIG_PRESSURE to match /proc/pressure? "PSI" is little too terse... Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --LpQ9ahxlCli8rRTG Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAltbljMACgkQMOfwapXb+vJangCfazQXvp2udMeXISRfTR8kVg3Q ReIAn1U+vmdcDISLPazXCUbd2cAXPJJI =ua6C -----END PGP SIGNATURE----- --LpQ9ahxlCli8rRTG--