From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f197.google.com (mail-io0-f197.google.com [209.85.223.197]) by kanga.kvack.org (Postfix) with ESMTP id 7936A6B0397 for ; Thu, 6 Apr 2017 14:33:29 -0400 (EDT) Received: by mail-io0-f197.google.com with SMTP id b74so20195653iod.12 for ; Thu, 06 Apr 2017 11:33:29 -0700 (PDT) Received: from mail-io0-x232.google.com (mail-io0-x232.google.com. [2607:f8b0:4001:c06::232]) by mx.google.com with ESMTPS id 77si2656145iom.97.2017.04.06.11.33.28 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 06 Apr 2017 11:33:28 -0700 (PDT) Received: by mail-io0-x232.google.com with SMTP id t68so1851532iof.0 for ; Thu, 06 Apr 2017 11:33:28 -0700 (PDT) Date: Thu, 6 Apr 2017 11:33:20 -0700 (PDT) From: Hugh Dickins Subject: RE: ksmd lockup - kernel 4.11-rc series In-Reply-To: <000801d2aede$cc414cd0$64c3e670$@net> Message-ID: References: <003401d2a750$19f98190$4dec84b0$@net> <20170327233617.353obb3m4wz7n5kv@node.shutemov.name> upRmczQN0LrIFupSgckp7c <000801d2aede$cc414cd0$64c3e670$@net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Doug Smythies Cc: Hugh Dickins , "Kirill A. Shutemov" , Andrew Morton , Naoya Horiguchi , linux-mm@kvack.org On Thu, 6 Apr 2017, Doug Smythies wrote: > Hi, > > Thank you for your quick work on this. > > On 2017.04.02 17:03 Hugh Dickins wrote: > > On Tue, 28 Mar 2017, Hugh Dickins wrote: > >> On Tue, 28 Mar 2017, Kirill A. Shutemov wrote: > >>> On Mon, Mar 27, 2017 at 04:16:00PM -0700, Doug Smythies wrote: > > ...[snip]... > > > Worked out what it was yesterday, but my first patch failed overnight: > > I'd missed the placement of the next_pte label. It had a similar fix > > to mm/migrate.c in it, that hit me too in testing; but this morning I > > find Naoya's 4b0ece6fa016 in git, which fixes that. > > I think I got that one sometimes also. > > > Same issue here. > > > > [PATCH] mm: fix page_vma_mapped_walk() for ksm pages > > ... [snip] ... > > To establish a baseline, I ran kernel 4.11-rc5 without this > patch for 24 hours. The failure occurred twice. > > I have been running the exact same scenario with the patch > for 55 hours now without any issues. Great, thanks a lot for your careful testing and report. > > Note: I stayed with version 1 of the patch, even though there > was a version 2 sent out on Monday. Right, I'd have done the same once useful testing was under way: that's fine, the fix is the same, but version 2 looks more elegant. I guess Andrew can add Tested-by: Doug Smythies or replace the Reported-by tag by Reported-and-Tested-by: Doug Smythies I'm not sure which is in fashion at present. Thanks! Hugh -- 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