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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 6F919C43468 for ; Sun, 20 Sep 2020 19:23:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D5EF620829 for ; Sun, 20 Sep 2020 19:23:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="TU8gswju" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D5EF620829 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2D246900010; Sun, 20 Sep 2020 15:23:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 25A3890000C; Sun, 20 Sep 2020 15:23:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0FBF690000F; Sun, 20 Sep 2020 15:23:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id E0622900009 for ; Sun, 20 Sep 2020 15:23:09 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id A70478249980 for ; Sun, 20 Sep 2020 19:23:09 +0000 (UTC) X-FDA: 77284412898.30.lock68_6010e152713e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id 81774180B3AA7; Sun, 20 Sep 2020 19:23:09 +0000 (UTC) X-HE-Tag: lock68_6010e152713e X-Filterd-Recvd-Size: 2692 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf36.hostedemail.com (Postfix) with ESMTP; Sun, 20 Sep 2020 19:23:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=M9C+xMteCLmxjuhFVA61FIZoHdpfMD5Lc3Ug+y14apc=; b=TU8gswjuXpvm/MyBSJB1vaOTwg 7CcQFeWPYOwW6PYXhvCpp0vzvWldb70TKuwk6v9nWcowTGn2VYxRj0sbzAeS1dOPc7tVJZV69Nc6Y Oye5Ac32YDMVeUtWbcgDk6Lqhz34cgGhYuiR2uTx7CyOyrh4ejW/zOiv0nLMgTDXz/4QksW+LarsO UKo48ovg6z43+egEg49LBUL7Qb1BK2+QYQXYWWRv+ZaoBr++1zvkvXaDBQNH/ENPEz9dpyIhUnPg/ RMo/EthNeTct23dRta9OEBgDELlkG8IIvv6XkLyXzRfFWLEelnomJhQf946LaXKaS04BIvNdWa7Hj bCj2UmxA==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kK4vL-0001qh-MM; Sun, 20 Sep 2020 19:22:59 +0000 Date: Sun, 20 Sep 2020 20:22:59 +0100 From: Matthew Wilcox To: Al Viro Cc: Christoph Hellwig , Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: Re: [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag Message-ID: <20200920192259.GU32101@casper.infradead.org> References: <20200918124533.3487701-1-hch@lst.de> <20200918124533.3487701-2-hch@lst.de> <20200920151510.GS32101@casper.infradead.org> <20200920180742.GN3421308@ZenIV.linux.org.uk> <20200920190159.GT32101@casper.infradead.org> <20200920191031.GQ3421308@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200920191031.GQ3421308@ZenIV.linux.org.uk> 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 Sun, Sep 20, 2020 at 08:10:31PM +0100, Al Viro wrote: > IMO it's much saner to mark those and refuse to touch them from io_uring... Simpler solution is to remove io_uring from the 32-bit syscall list. If you're a 32-bit process, you don't get to use io_uring. Would any real users actually care about that?