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Mon, 21 Sep 2020 09:29:07 -0700 (PDT) Subject: Re: [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag To: Matthew Wilcox , 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 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> <20200920192259.GU32101@casper.infradead.org> From: Pavel Begunkov Autocrypt: addr=asml.silence@gmail.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <20200920192259.GU32101@casper.infradead.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On 20/09/2020 22:22, Matthew Wilcox wrote: > 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? There were .net and\or wine (which AFAIK often works in compat) guys experimenting with io_uring, they might want it. -- Pavel Begunkov