Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751481AbaK0Sq5 (ORCPT ); Thu, 27 Nov 2014 13:46:57 -0500 Received: from mail-la0-f53.google.com ([209.85.215.53]:51927 "EHLO mail-la0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750946AbaK0Sq4 (ORCPT ); Thu, 27 Nov 2014 13:46:56 -0500 MIME-Version: 1.0 In-Reply-To: <20141127183616.GV25677@wotan.suse.de> References: <1417040805-15857-1-git-send-email-mcgrof@do-not-panic.com> <5476C66F.5040308@suse.com> <20141127183616.GV25677@wotan.suse.de> From: "Luis R. Rodriguez" Date: Thu, 27 Nov 2014 13:46:34 -0500 X-Google-Sender-Auth: EUNe-5SzN7_b565HIMtdBmMTRMU Message-ID: Subject: Re: [PATCH] xen: privcmd: schedule() after private hypercall when non CONFIG_PREEMPT To: Juergen Gross Cc: "Luis R. Rodriguez" , David Vrabel , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, xen-devel@lists.xenproject.org, "linux-kernel@vger.kernel.org" , x86@kernel.org, kvm@vger.kernel.org, Davidlohr Bueso , Joerg Roedel , Borislav Petkov , Jan Beulich , Olaf Hering Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 27, 2014 at 1:36 PM, Luis R. Rodriguez wrote: > I'm afraid we don't have much leg room. Let me be clear, I still think putting some hypercalls in process context *might help* but because of notes 1) and 2) I highlighted I think this is the best we can do, with more information we should be able to consider weighing pros / cons with actual metrics from alternatives, without more information we're just shooting in the dark and the last thing I want is to see APIs abused or setting precedents. Luis -- 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/