Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx1.redhat.com ([209.132.183.28]:36476 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754020Ab3CFSk3 (ORCPT ); Wed, 6 Mar 2013 13:40:29 -0500 Date: Wed, 6 Mar 2013 13:40:04 -0500 From: Jeff Layton To: Oleg Nesterov Cc: Tejun Heo , "Myklebust, Trond" , Mandeep Singh Baines , Ming Lei , "J. Bruce Fields" , Linux Kernel Mailing List , "linux-nfs@vger.kernel.org" , "Rafael J. Wysocki" , Andrew Morton , Ingo Molnar , Al Viro Subject: Re: LOCKDEP: 3.9-rc1: mount.nfs/4272 still has locks held! Message-ID: <20130306134004.16252a21@tlielax.poochiereds.net> In-Reply-To: <20130306181735.GB18687@redhat.com> References: <20130304092310.1d21100c@tlielax.poochiereds.net> <20130304205307.GA13527@redhat.com> <4FA345DA4F4AE44899BD2B03EEEC2FA9286AEEB0@sacexcmbx05-prd.hq.netapp.com> <20130305082308.6607d4db@tlielax.poochiereds.net> <20130305174648.GF12795@htj.dyndns.org> <20130305174954.GG12795@htj.dyndns.org> <20130305140312.243cb094@tlielax.poochiereds.net> <20130305190923.GI12795@htj.dyndns.org> <20130305183941.19ff39ce@tlielax.poochiereds.net> <20130306181735.GB18687@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-nfs-owner@vger.kernel.org List-ID: On Wed, 6 Mar 2013 19:17:35 +0100 Oleg Nesterov wrote: > On 03/05, Jeff Layton wrote: > > > > Anyone up for working out how to handle a freeze event on a process > > that already has a pending signal, while it's being ptraced? > > Could you explain the problem? > Not very well. I was just saying that the signal/ptrace stuff is very complicated already. Now we're looking at mixing in the freezer too, which further increases the complexity. Though when I said that, it was before Tejun mentioned hooking this up to ptrace. I'll confess that I don't fully understand what he's proposing either though... -- Jeff Layton