From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752524AbbANR5K (ORCPT ); Wed, 14 Jan 2015 12:57:10 -0500 Received: from mx1.redhat.com ([209.132.183.28]:62407 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751031AbbANR5J (ORCPT ); Wed, 14 Jan 2015 12:57:09 -0500 Date: Wed, 14 Jan 2015 18:56:08 +0100 From: Oleg Nesterov To: Rik van Riel Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, hpa@zytor.com, matt.fleming@intel.com, bp@suse.de, pbonzini@redhat.com, tglx@linutronix.de, luto@amacapital.net Subject: Re: [RFC PATCH 04/11] x86,fpu: defer FPU restore until return to userspace Message-ID: <20150114175608.GA15392@redhat.com> References: <1421012793-30106-1-git-send-email-riel@redhat.com> <1421012793-30106-5-git-send-email-riel@redhat.com> <20150113171134.GA27519@redhat.com> <54B55BE7.1020107@redhat.com> <20150113182239.GA30475@redhat.com> <20150113183003.GB30475@redhat.com> <54B57AAC.6020903@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <54B57AAC.6020903@redhat.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/13, Rik van Riel wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 01/13/2015 01:30 PM, Oleg Nesterov wrote: > > On 01/13, Oleg Nesterov wrote: > >> > >> But yes, I think we need the per-cpu "in_kernel_fpu" and > >> irq_fpu_usable() must die. Please look at > >> http://marc.info/?l=linux-kernel&m=14096628660929 > > This link does not work for me. I wonder if that email is not > on the marc.info node I managed to send my http request to... Sorry, copy-and-paste error, http://marc.info/?l=linux-kernel&m=140966286609295 > > Plus I think we need this to fix the race with > > math_state_restore()... Please see > > http://marc.info/?l=linux-kernel&m=140992479607206 > > > > Unfortunately I forgot other problems I found in this area... And I > > completely forgot the plan I had in mind ;) > > That I can certainly merge into my series. Perhaps I should resend this series... I'll recheck, it should not conflict with your changes (at least too much). Oleg.