From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f45.google.com (mail-wg0-f45.google.com [74.125.82.45]) by kanga.kvack.org (Postfix) with ESMTP id D16286B006E for ; Thu, 7 May 2015 07:40:38 -0400 (EDT) Received: by wgic8 with SMTP id c8so14068112wgi.1 for ; Thu, 07 May 2015 04:40:38 -0700 (PDT) Received: from casper.infradead.org (casper.infradead.org. [2001:770:15f::2]) by mx.google.com with ESMTPS id fs5si2835275wjb.120.2015.05.07.04.40.37 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 May 2015 04:40:37 -0700 (PDT) Date: Thu, 7 May 2015 13:40:21 +0200 From: Peter Zijlstra Subject: Re: [PATCH RFC 00/15] decouple pagefault_disable() from preempt_disable() Message-ID: <20150507114021.GH23123@twins.programming.kicks-ass.net> References: <1430934639-2131-1-git-send-email-dahi@linux.vnet.ibm.com> <20150506150158.0a927470007e8ea5f3278956@linux-foundation.org> <20150507094819.GC4734@gmail.com> <554B43AA.1050605@de.ibm.com> <20150507110828.GA15284@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150507110828.GA15284@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Ingo Molnar Cc: Christian Borntraeger , Andrew Morton , David Hildenbrand , linux-kernel@vger.kernel.org, mingo@redhat.com, yang.shi@windriver.com, bigeasy@linutronix.de, benh@kernel.crashing.org, paulus@samba.org, heiko.carstens@de.ibm.com, schwidefsky@de.ibm.com, mst@redhat.com, tglx@linutronix.de, David.Laight@ACULAB.COM, hughd@google.com, hocko@suse.cz, ralf@linux-mips.org, herbert@gondor.apana.org.au, linux@arm.linux.org.uk, airlied@linux.ie, daniel.vetter@intel.com, linux-mm@kvack.org, linux-arch@vger.kernel.org On Thu, May 07, 2015 at 01:08:28PM +0200, Ingo Molnar wrote: > Yes, but I'm wondering what I'm missing: is there any deep reason for > making pagefaults-disabled sections non-atomic? This all comes from -rt, where we had significant latencies due to these things. -- 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