From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751218AbdFEPmk convert rfc822-to-8bit (ORCPT ); Mon, 5 Jun 2017 11:42:40 -0400 Received: from mout.gmx.net ([212.227.15.15]:58480 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751077AbdFEPmj (ORCPT ); Mon, 5 Jun 2017 11:42:39 -0400 Message-ID: <1496677312.10610.21.camel@gmx.de> Subject: Re: [bisected] Re: tty lockdep trace From: Mike Galbraith To: Alan Cox Cc: Vegard Nossum , Greg Kroah-Hartman , Dave Jones , Linux Kernel , Jiri Slaby Date: Mon, 05 Jun 2017 17:41:52 +0200 In-Reply-To: <20170605160912.56c76d68@lxorguk.ukuu.org.uk> References: <20170531172117.nj5fwgqspibg7rs6@codemonkey.org.uk> <1496471632.11868.1.camel@gmx.de> <20170604083225.GA2959@kroah.com> <1496566972.16375.10.camel@gmx.de> <6b025884-8fbc-1ae2-3119-63e601453ad6@oracle.com> <1496576071.6573.13.camel@gmx.de> <20170605160912.56c76d68@lxorguk.ukuu.org.uk> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 Mime-Version: 1.0 Content-Transfer-Encoding: 8BIT X-Provags-ID: V03:K0:pO522/ekYn2Xs0GvI8/EGNPuToX57KDLXdGP4cdRiXfjInR/Hk8 1v0U4jrEyTZpK+UcfoJgOBTIWoJwanG2hl0bTt8IqLPdVT9Ih9f6Uyh80fpAu6yJ9W+WeMI e26dL0qzX6uVMjTg2fUG7v/7cbhATJ4KI7JsomyVFfgRaqh2rUbZck+16bAyxWOfL6GDYSx HKzuw1UNOHli17WNhZMqw== X-UI-Out-Filterresults: notjunk:1;V01:K0:HVn+b0ttOVY=:+zoRwkvgLkVjjctEeqAmCF p45AqRNxE591fjZibCcu2EMSokk84ciOWop4r/bbZFhlMD2CRsRiRWXLa0YqK37sjozs8mNFU 9pvI/OtKcv7Oyhbrr0lNGMcEbVgP+dgNsWmVAq155WzYI6njpsbTueipwM/5Gd1cYUptHOQLI AeC8Tfd7pbAURdBfQDfMnUmeRUlGmVQPIA7e02Fr163aJKHM5eSHgmErJSNIqRzlXizuK+PCS JMgunyIi0O73CmciWfsG0G+mw5xkOvpm702M4YQh53yhphNIHuvN06LVQQldufdmBfRa5hVoC LH60FucIh5WKQpZ4pl5HlQ8pD3jopmxhBA1UoX/qYcQs+tKhQH3a7aYniJTxbJXbbIlIIW9nZ e8ZTmCFwR9oC8Vg0QKkreO+ho3ZhuxklxImlBvp7QBuA13XexE3oUw6wsKjCm+BEdp4v5Xc4s PuEE51s1ST5n195qOu0ULxRXXHZuyyfh4e1V2T/w2ZVmFcAt969dV25hgg4qQQsDeqoulwYv8 UlVYkIAdFOek5onedhOEV6uzyBO7MthWmwOQ0S+3Wm6qaKCtXpwUckunZbErrX/F48sE4rAIw SfTg+aXoyWMRl5exeVddprB+qcniBmV+K1DS4HI+f7SnraTSpuwRxaXZqAyK/D4pL0i1DHwgW sR2MvHTB2W7eGby5inLgMswcQKHMlKf/gI936b+LLLIlF3zs2FRcp69sh5a2TM2ylqSn/A5Zs ahosjJU4pPsCILaiOAZamssUEaC+mV65KZXqe/XkCHIYGFRUaT+UCTIFc1o9UAtjHCEmgnsfH 36ZKvEY Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2017-06-05 at 16:09 +0100, Alan Cox wrote: > On Sun, 04 Jun 2017 13:34:31 +0200 > Mike Galbraith wrote: > > > On Sun, 2017-06-04 at 12:00 +0200, Vegard Nossum wrote: > > > > > > I don't know how you did it, but this passes my testing (reproducers for > > > both the original issue and the lockdep splat/hang). > > > > I suppose I can sign it off, see if that inspires anyone to come up > > with something better. > > > > drivers/tty: Fix 925bb1ce47f4 circular locking dependency > > This is still completely broken and has the same underlying flaw as the > original. Thanks for looking.  It didn't look the least bit lovely, it being equally busted (well, ever so slightly less, lockdep did sthu;) is not a shocker.  Off to the bin ya go little patchlet. -Mike