Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932700AbbGTOWQ (ORCPT ); Mon, 20 Jul 2015 10:22:16 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38563 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932679AbbGTOWN (ORCPT ); Mon, 20 Jul 2015 10:22:13 -0400 From: Jeff Moyer To: Oleg Nesterov Cc: Benjamin LaHaise , Andrew Morton , Joonsoo Kim , Fengguang Wu , Johannes Weiner , Stephen Rothwell , linux-next@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm-move-mremap-from-file_operations-to-vm_operations_struct-fix References: <20150716231405.GA25147@redhat.com> <20150716162444.26425f5e227387f1166a6d16@linux-foundation.org> <20150716235227.GA26551@redhat.com> <20150717140615.GA2779@kvack.org> <20150717223147.GA13259@redhat.com> X-PGP-KeyID: 1F78E1B4 X-PGP-CertKey: F6FE 280D 8293 F72C 65FD 5A58 1FF8 A7CA 1F78 E1B4 X-PCLoadLetter: What the f**k does that mean? Date: Mon, 20 Jul 2015 10:22:10 -0400 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 980 Lines: 27 Hi, Oleg, Oleg Nesterov writes: > Shouldn't we account aio events/pages somehow, say per-user, or in > mm->pinned_vm ? Ages ago I wrote a patch to account the completion ring to a process' memlock limit: "[patch] aio: remove aio-max-nr and instead use the memlock rlimit to limit the number of pages pinned for the aio completion ring" http://marc.info/?l=linux-aio&m=123661380807041&w=2 The problem with that patch is that it modifies the user/kernel interface. It could be done over time, as Andrew outlined in that thread, but I've been reluctant to take that on. If you just mean we should account the memory so that the right process can be killed, that sounds like a good idea to me. Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/