From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751430AbdAMJt4 (ORCPT ); Fri, 13 Jan 2017 04:49:56 -0500 Received: from mailapp01.imgtec.com ([195.59.15.196]:43192 "EHLO imgpgp01.kl.imgtec.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751337AbdAMJtl (ORCPT ); Fri, 13 Jan 2017 04:49:41 -0500 X-PGP-Universal: processed; by imgpgp01.kl.imgtec.org on Fri, 13 Jan 2017 10:52:09 +0000 Date: Fri, 13 Jan 2017 09:49:39 +0000 From: James Hogan To: "Jason A. Donenfeld" CC: Ralf Baechle , Matt Redfearn , , Thomas Gleixner , Paolo Bonzini , Marcin Nowakowski , Chris Metcalf , Petr Mladek , LKML , Adam Buchbinder , Paul Burton , Jiri Slaby , "Maciej W. Rozycki" , Aaron Tomlin , Andrew Morton Subject: Re: [PATCH v3 0/5] MIPS: Add per-cpu IRQ stack Message-ID: <20170113094939.GI10569@jhogan-linux.le.imgtec.org> References: <1482157260-18730-1-git-send-email-matt.redfearn@imgtec.com> <20170111012032.GE31072@linux-mips.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="HkfZ6fDZyisrdUtK" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-Originating-IP: [192.168.154.110] X-ESG-ENCRYPT-TAG: 1b7d744b Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --HkfZ6fDZyisrdUtK Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jan 12, 2017 at 12:32:52AM +0100, Jason A. Donenfeld wrote: > On Wed, Jan 11, 2017 at 2:20 AM, Ralf Baechle wrote: > > On Wed, Jan 11, 2017 at 12:32:38AM +0100, Jason A. Donenfeld wrote: > > > >> Was this ever picked up for 4.10 or 4.11? > > > > Still sitting in -next as commit 3cc3434fd630 and its four parent commi= ts. >=20 > Oh, good, so it's progressing normally. I just didn't see any > acknowledgement on this thread so I was worried. >=20 > Can this propagate to stable? A few OpenWRT MIPS people are > complaining to me about sporadic crashes when stacking too many > virtual network drivers (batman over gre over ppp over ...), which is > solved by this patchset. >=20 > Jason Its quite a significant change/feature, especially in terms of potential for further breakage. I don't think its really stable material to be honest. The actual stable kernel rules are here though: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Docume= ntation/process/stable-kernel-rules.rst Do the OpenWRT issues affect mainline kernels? (if its due to excessive stack frame sizes in out of tree code, then that should be fixed out of tree). It sounds bad if the kernel stack requirement can be made arbitrarily large by stacking too many drivers. Is there a simpler fix/workaround for the issue that would satisfy stable kernel users until they can upgrade to a kernel with irqstacks? Cheers James --HkfZ6fDZyisrdUtK Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQIcBAEBCAAGBQJYeKKeAAoJEGwLaZPeOHZ6UxAP/2R/TOh5d017b02J/480VvMH qkJIUFpW1d7GvniS2ruUDUQchtZkqoGIHHI3oXiWjvIAWnXPha1jzL3QVPFQCwpd +yWhG3mQbhhyTkEVDbk4ISsLUixIzxJRjBuqecnIkZfOXUrLNI5QyJ4E4ysHepYQ ALoPK6V3wOBqStut7dMYWCk/Py2iMpmgdyUxekHNimp6k+nrb3LMsJGnFmCsATet sNwsvLNlEgiLOkAauGgJAjWbHNtX7yD77Yjo5eJ+1hmViuhsOu4XIy/yAtYskdwl EGxhlS9xd+5xHuNEIZX7+CXgQh0UMZneKV6YMM63aByhKpkIIrLke/IH28xSgi/w ZfCuSu7MpPZFXLIhohc2dfhhtjN4e6Ti6XwhTFj2TmatKtU8AKK77HupXCSQI4Ic y/54c+NMkMVq/lBLYXPNxoM9SYDsAjBrgJaDaZPECvX0WCn6LUokFkh7dh/9DNwR f1ipw/cl9wex3MN6K9OXSLXObRdShZrzdarX08DtlK5tWkZb2OS1acQfbndjpxq+ 94C/lbudwrIHw5kr8J3xnfxOqdVv7R+AYuUwbkD80pHyLek3TQ1TAn1/COk3UD96 aMMnPt7KL+dSaoD1NulEOtOftxs79BZ2iJarL4wMfJYwqaXelU4DuOGHGYzKibRq X+lIXy3xXe+qIkMrNAk0 =PhbQ -----END PGP SIGNATURE----- --HkfZ6fDZyisrdUtK--