From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qa0-f53.google.com (mail-qa0-f53.google.com [209.85.216.53]) by kanga.kvack.org (Postfix) with ESMTP id B8A416B006E for ; Tue, 22 Apr 2014 15:37:23 -0400 (EDT) Received: by mail-qa0-f53.google.com with SMTP id w8so5419328qac.40 for ; Tue, 22 Apr 2014 12:37:23 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTP id m9si9548094qge.171.2014.04.22.12.37.22 for ; Tue, 22 Apr 2014 12:37:23 -0700 (PDT) Date: Tue, 22 Apr 2014 15:09:28 -0400 From: Dave Jones Subject: Re: 3.15rc2 hanging processes on exit. Message-ID: <20140422190928.GA25183@redhat.com> References: <20140422180308.GA19038@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds Cc: Linux Kernel , linux-mm , Hugh Dickins 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, 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