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Date: Fri, 8 Jul 2016 14:17:04 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Dmitry Safonov <dsafonov@virtuozzo.com>
Cc: linux-kernel@vger.kernel.org, 0x7f454c46@gmail.com, mingo@redhat.com,
        luto@kernel.org, linux-mm@kvack.org,
        Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
        Shuah Khan <shuahkh@osg.samsung.com>, x86@kernel.org,
        linux-kselftest@vger.kernel.org
Subject: Re: [PATCHv10 2/2] selftest/x86: add mremap vdso test
Message-ID: <20160708121704.GA31371@gmail.com>
References: <20160628113539.13606-1-dsafonov@virtuozzo.com>
 <20160628113539.13606-3-dsafonov@virtuozzo.com>
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* Dmitry Safonov <dsafonov@virtuozzo.com> wrote:

> Or print that mremap for vDSO is unsupported:
> [root@localhost ~]# ./test_mremap_vdso_32
> 	AT_SYSINFO_EHDR is 0xf773c000
> [NOTE]	Moving vDSO: [0xf773c000, 0xf773d000] -> [0xf7737000, 0xf7738000]
> [FAIL]	mremap() of the vDSO does not work on this kernel!

Hm, I tried this on a 64-bit kernel and got:

triton:~/tip/tools/testing/selftests/x86> ./test_mremap_vdso_32 
        AT_SYSINFO_EHDR is 0xf7773000
[NOTE]  Moving vDSO: [0xf7773000, 0xf7774000] -> [0xf776e000, 0xf776f000]
Segmentation fault

Thanks,

	Ingo