Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753414AbbDAT1L (ORCPT ); Wed, 1 Apr 2015 15:27:11 -0400 Received: from mail-pa0-f47.google.com ([209.85.220.47]:35518 "EHLO mail-pa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753100AbbDAT1H convert rfc822-to-8bit (ORCPT ); Wed, 1 Apr 2015 15:27:07 -0400 From: Kevin Hilman To: Geert Uytterhoeven Cc: Ard Biesheuvel , Will Deacon , Simon Horman , Tyler Baker , Nishanth Menon , Russell King - ARM Linux , Arnd Bergmann , "linux-sh\@vger.kernel.org" , Marc Zyngier , Catalin Marinas , Magnus Damm , "grygorii.strashko\@linaro.org" , "linux-omap\@vger.kernel.org" , "linux-arm-kernel\@lists.infradead.org" , Andrew Morton , Linux Kernel Development , linux-mm@kvack.org Subject: Re: [PATCH] mm/migrate: Mark unmap_and_move() "noinline" to avoid ICE in gcc 4.7.3 References: <20150324004537.GA24816@verge.net.au> <20150324161358.GA694@kahuna> <20150326003939.GA25368@verge.net.au> <20150326133631.GB2805@arm.com> <20150327002554.GA5527@verge.net.au> <20150327100612.GB1562@arm.com> <7hbnj99epe.fsf@deeprootsystems.com> <7h8uec95t2.fsf@deeprootsystems.com> Date: Wed, 01 Apr 2015 12:27:04 -0700 In-Reply-To: (Geert Uytterhoeven's message of "Wed, 1 Apr 2015 11:37:13 +0200 (CEST)") Message-ID: <7hh9sz6453.fsf@deeprootsystems.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2805 Lines: 76 Geert Uytterhoeven writes: [...] >> build bisect points to commit 21f992084aeb[3], but that doesn't revert >> cleanly so I haven't got any further than that yet. > > I installed gcc-arm-linux-gnueabi (4:4.7.2-1 from Ubuntu 14.04 LTS) and could > reproduce the ICE. I came up with the workaround below. Awesome, thanks! > Does this work for you? Yes, that patch works well and fixes the regression. Build results for all the defconfigs here: http://kernelci.org/build/khilman/kernel/v4.0-rc6-8294-g2ef3958cc27e/ and the remaining issues arent' realted to this ICE. > From 7ebe83316eaf1952e55a76754ce7a5832e461b8c Mon Sep 17 00:00:00 2001 > From: Geert Uytterhoeven > Date: Wed, 1 Apr 2015 11:22:51 +0200 > Subject: [PATCH] mm/migrate: Mark unmap_and_move() "noinline" to avoid ICE in > gcc 4.7.3 > MIME-Version: 1.0 > Content-Type: text/plain; charset=UTF-8 > Content-Transfer-Encoding: 8bit > > With gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-12ubuntu1) : > > mm/migrate.c: In function ‘migrate_pages’: > mm/migrate.c:1148:1: internal compiler error: in push_minipool_fix, at config/arm/arm.c:13500 > Please submit a full bug report, > with preprocessed source if appropriate. > See for instructions. > Preprocessed source stored into /tmp/ccPoM1tr.out file, please attach this to your bugreport. > make[1]: *** [mm/migrate.o] Error 1 > make: *** [mm/migrate.o] Error 2 > > Mark unmap_and_move() (which is used in a single place only) "noinline" > to work around this compiler bug. > > Reported-by: Kevin Hilman > Signed-off-by: Geert Uytterhoeven Tested-by: Kevin Hilman > --- > mm/migrate.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) > > diff --git a/mm/migrate.c b/mm/migrate.c > index 114602a68111d809..98f8574456c2010c 100644 > --- a/mm/migrate.c > +++ b/mm/migrate.c > @@ -904,9 +904,10 @@ out: > * Obtain the lock on page, remove all ptes and migrate the page > * to the newly allocated page in newpage. > */ > -static int unmap_and_move(new_page_t get_new_page, free_page_t put_new_page, > - unsigned long private, struct page *page, int force, > - enum migrate_mode mode) > +static noinline int unmap_and_move(new_page_t get_new_page, > + free_page_t put_new_page, > + unsigned long private, struct page *page, > + int force, enum migrate_mode mode) > { > int rc = 0; > int *result = NULL; -- 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/