From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f176.google.com (mail-pd0-f176.google.com [209.85.192.176]) by kanga.kvack.org (Postfix) with ESMTP id B106D6B0038 for ; Wed, 30 Jul 2014 06:12:38 -0400 (EDT) Received: by mail-pd0-f176.google.com with SMTP id y10so1216693pdj.35 for ; Wed, 30 Jul 2014 03:12:38 -0700 (PDT) Received: from bombadil.infradead.org (bombadil.infradead.org. [2001:1868:205::9]) by mx.google.com with ESMTPS id qo7si1846263pac.190.2014.07.30.03.12.36 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Jul 2014 03:12:37 -0700 (PDT) Date: Wed, 30 Jul 2014 12:12:18 +0200 From: Peter Zijlstra Subject: Re: [RFC PATCH] mm: Add helpers for locked_vm Message-ID: <20140730101218.GG19379@twins.programming.kicks-ass.net> References: <1406712493-9284-1-git-send-email-aik@ozlabs.ru> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="YuRE/gUr1KgjPX1R" Content-Disposition: inline In-Reply-To: <1406712493-9284-1-git-send-email-aik@ozlabs.ru> Sender: owner-linux-mm@kvack.org List-ID: To: Alexey Kardashevskiy Cc: Benjamin Herrenschmidt , Andrew Morton , "Kirill A . Shutemov" , Rik van Riel , Mel Gorman , Johannes Weiner , Andrea Arcangeli , Sasha Levin , Wanpeng Li , Vlastimil Babka , =?iso-8859-1?Q?J=F6rn?= Engel , "Paul E . McKenney" , Davidlohr Bueso , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Alex Williamson , Alexander Graf , Michael Ellerman --YuRE/gUr1KgjPX1R Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 30, 2014 at 07:28:13PM +1000, Alexey Kardashevskiy wrote: > This adds 2 helpers to change the locked_vm counter: > - try_increase_locked_vm - may fail if new locked_vm value will be greater > than the RLIMIT_MEMLOCK limit; > - decrease_locked_vm. >=20 > These will be used by drivers capable of locking memory by userspace > request. For example, VFIO can use it to check if it can lock DMA memory > or PPC-KVM can use it to check if it can lock memory for TCE tables. Urgh no.. have a look here: lkml.kernel.org/r/20140526145605.016140154@infradead.org Someone needs to go help with the IB stuff, I got properly lost in there. --YuRE/gUr1KgjPX1R Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJT2MUCAAoJEHZH4aRLwOS6tgcP/irknQ9NQqFgjP6iEkuuxHin 7HpyR+dr0RJnCyp6aqaneqfIX6MtyUnIVUsxPegu6OEGHwbYWE+D2XWZAbXHaMdW GC2J6wCMw6YVBuBoXaUIxlmgL/VVcXuDluMkww6b3roBmF4jW+0jjIVG8hkX6DUl YaG/cv6Kclu4vS4f+hXOMEd/rd+PJMl9O8Kk8yzcHGXfcBt2IOTqiiHwG/GX2XTw 1h6QvPid6SWLQ6EbHVZZd95/jgAowkwuVJZddlBxUwd839mg4+i/ypMtu7YXz5dN x25Nvo6w+8sCQcq1G1GACaWcJTsKJhAjew90nF33EGU+PjqzgWJdwN07gBQa9zjV F5pVrc2aYAGJWsxGTtq4kDD6w3B3oh1AKlv2/SAYA6koX29OGFi9WN5hUWOm3MG8 LIqwqhfuhL0tWFAbn9dP3IFHzeMjCyeyhpQMxIL2bqMFHicqk/+qz87ol9l69Qg1 Bwip5wxihkTQ9nfzK7FcUBthI3Hy4a09gXZm3KdpxvPoa9ZdfXfxuNF/gSRcfoHy jzazCcWD+rZIMLPy509v49223MD9j4peSNjd3E64GlZFQqHHezDSUiNY6dl/jT39 XUTpoBdWXvQAb1z3YOYVDRNDIoDQroXQdelggdcACPn2aqj+kyXnB73+K6L+OGAC tSxKdbkan5Zdl6BRbSx8 =zcmc -----END PGP SIGNATURE----- --YuRE/gUr1KgjPX1R-- -- 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