From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6EA3AC433E0 for ; Thu, 7 Jan 2021 01:49:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D405E2311E for ; Thu, 7 Jan 2021 01:49:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D405E2311E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E6E7E8D010F; Wed, 6 Jan 2021 20:49:20 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E1DDB8D0090; Wed, 6 Jan 2021 20:49:20 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D34F68D010F; Wed, 6 Jan 2021 20:49:20 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0064.hostedemail.com [216.40.44.64]) by kanga.kvack.org (Postfix) with ESMTP id BC0158D0090 for ; Wed, 6 Jan 2021 20:49:20 -0500 (EST) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 78426180AD811 for ; Thu, 7 Jan 2021 01:49:20 +0000 (UTC) X-FDA: 77677296480.09.bomb73_3407b84274e6 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin09.hostedemail.com (Postfix) with ESMTP id 5FAE0180AD815 for ; Thu, 7 Jan 2021 01:49:20 +0000 (UTC) X-HE-Tag: bomb73_3407b84274e6 X-Filterd-Recvd-Size: 2581 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf23.hostedemail.com (Postfix) with ESMTP for ; Thu, 7 Jan 2021 01:49:19 +0000 (UTC) Received: from oasis.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B75702223E; Thu, 7 Jan 2021 01:49:16 +0000 (UTC) Date: Wed, 6 Jan 2021 20:49:14 -0500 From: Steven Rostedt To: Linus Torvalds Cc: Willem de Bruijn , Jakub Kicinski , David Miller , Jonathan Lemon , Thomas Gleixner , LKML , "the arch/x86 maintainers" , Christoph Hellwig , Matthew Wilcox , Daniel Vetter , Andrew Morton , Linux-MM , Peter Zijlstra , Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Netdev Subject: Re: [BUG] from x86: Support kmap_local() forced debugging Message-ID: <20210106204914.40eaf49a@oasis.local.home> In-Reply-To: References: <20201118194838.753436396@linutronix.de> <20201118204007.169209557@linutronix.de> <20210106180132.41dc249d@gandalf.local.home> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 6 Jan 2021 17:03:48 -0800 Linus Torvalds wrote: > --- a/include/linux/skbuff.h > +++ b/include/linux/skbuff.h > @@ -366,7 +366,7 @@ static inline void skb_frag_size_sub(skb_frag_t *frag, int delta) > static inline bool skb_frag_must_loop(struct page *p) > { > #if defined(CONFIG_HIGHMEM) > - if (PageHighMem(p)) > + if (IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP) || PageHighMem(p)) > return true; > #endif > return false; I applied this and I haven't been able to crash it again. Thanks, -- Steve