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[46.53.217.92]) by smtp.gmail.com with ESMTPSA id h5-v6sm17347541wrs.51.2018.11.10.10.49.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 10 Nov 2018 10:49:59 -0800 (PST) Date: Sat, 10 Nov 2018 21:49:57 +0300 From: Alexey Dobriyan To: Rafael David Tinoco Cc: gorcunov@gmail.com, akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, shuah@kernel.org Subject: Re: [PATCH] proc: fix and merge proc-self-map-file tests Message-ID: <20181110184957.GB18252@avx2> References: <20181108111105.GC13195@uranus.lan> <20181109113036.21512-1-rafael.tinoco@linaro.org> <20181110174727.GA26417@avx2> <1541872563.3175498.1572453416.153B57C9@webmail.messagingengine.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1541872563.3175498.1572453416.153B57C9@webmail.messagingengine.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Nov 10, 2018 at 03:56:03PM -0200, Rafael David Tinoco wrote: > On Sat, Nov 10, 2018, at 3:47 PM, Alexey Dobriyan wrote: > > On Fri, Nov 09, 2018 at 09:30:36AM -0200, Rafael David Tinoco wrote: > > > Merge proc-self-map-files tests into one since this test should focus in > > > testing readlink in /proc/self/map_files/* only, and not trying to test > > > mapping virtual address 0. > > > > > > Lowest virtual address for user space mapping in other architectures, > > > like arm, is *at least* *(PAGE_SIZE * 2) and NULL hint does not > > > guarantee that when MAP_FIXED flag, important to this test, is given. > > > This patch also fixes this issue in remaining test. > > > > > - p = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE, fd, 0); > > > + p = mmap((void *) (2 * PAGE_SIZE), PAGE_SIZE, PROT_NONE, > > > > I don't know ARM. Is this 2 page limitation a limitation of hardware or > > kernel's? > > Kernel: > https://bugs.linaro.org/show_bug.cgi?id=3782#c7 Ahh. please test the path I've sent, I don't have arm install readily available.