From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755496AbcEEBTa (ORCPT ); Wed, 4 May 2016 21:19:30 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51378 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754171AbcEEBT3 (ORCPT ); Wed, 4 May 2016 21:19:29 -0400 Date: Wed, 4 May 2016 19:19:27 -0600 From: Alex Williamson To: Andrea Arcangeli Cc: "Kirill A. Shutemov" , kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, "linux-mm@kvack.org" Subject: Re: [BUG] vfio device assignment regression with THP ref counting redesign Message-ID: <20160504191927.095cdd90@t450s.home> In-Reply-To: <20160502180307.GB12310@redhat.com> References: <20160428181726.GA2847@node.shutemov.name> <20160428125808.29ad59e5@t450s.home> <20160428232127.GL11700@redhat.com> <20160429005106.GB2847@node.shutemov.name> <20160428204542.5f2053f7@ul30vt.home> <20160429070611.GA4990@node.shutemov.name> <20160429163444.GM11700@redhat.com> <20160502104119.GA23305@node.shutemov.name> <20160502152307.GA12310@redhat.com> <20160502160042.GC24419@node.shutemov.name> <20160502180307.GB12310@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2 May 2016 20:03:07 +0200 Andrea Arcangeli wrote: > On Mon, May 02, 2016 at 07:00:42PM +0300, Kirill A. Shutemov wrote: > > Agreed. I just didn't see the two-refcounts solution. > > If you didn't do it already or if you're busy with something else, > I can change the patch to the two refcount solution, which should > restore the old semantics without breaking rmap. I didn't see any follow-up beyond this nor patches on lkml. Do we have something we feel confident for posting to v4.6 with a stable backport to v4.5? Thanks, Alex