Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755349AbaDVTKB (ORCPT ); Tue, 22 Apr 2014 15:10:01 -0400 Received: from mx1.redhat.com ([209.132.183.28]:22047 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754729AbaDVTJm (ORCPT ); Tue, 22 Apr 2014 15:09:42 -0400 Date: Tue, 22 Apr 2014 15:09:28 -0400 From: Dave Jones To: Linus Torvalds Cc: Linux Kernel , linux-mm , Hugh Dickins Subject: Re: 3.15rc2 hanging processes on exit. Message-ID: <20140422190928.GA25183@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , Linux Kernel , linux-mm , Hugh Dickins References: <20140422180308.GA19038@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 22, 2014 at 11:57:50AM -0700, Linus Torvalds wrote: > Are you testing anything new? Or is this strictly new to 3.15? The > only thing in this area we do differently is commit cda540ace6a1 ("mm: > get_user_pages(write,force) refuse to COW in shared areas"), but > fault_in_user_writeable() never used the force bit afaik. Adding Hugh > just in case. You mean new as in additions to trinity ? The only recent chance that might be relevant is that now, when I create struct iovec's to pass to syscalls, I populate them solely with results from mmap's rather than a mix of mmaps and mallocs. The mmaps could be all kinds of sizes, types etc. [*] So now there's more chance I guess that an iovec contains a bunch of hugepages, or read-only pages etc. I took another slightly longer trace of what's going on at http://codemonkey.org.uk/junk/trace2.out But it looks to me to be pretty similar. Dave [*] https://github.com/kernelslacker/trinity/commit/1e73841971717256089d63e9f7fc33972d48028c -- 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/