From: Michal Hocko <mhocko@kernel.org>
To: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, mike.kravetz@oracle.com
Subject: Re: [PATCH V2] selftests/vm: Add tests to validate mirror functionality with mremap
Date: Tue, 25 Jul 2017 15:36:04 +0200 [thread overview]
Message-ID: <20170725133604.GA27322@dhcp22.suse.cz> (raw)
In-Reply-To: <20170725063657.3915-1-khandual@linux.vnet.ibm.com>
On Tue 25-07-17 12:06:57, Anshuman Khandual wrote:
[...]
> diff --git a/tools/testing/selftests/vm/mremap_mirror_private_anon.c b/tools/testing/selftests/vm/mremap_mirror_private_anon.c
[...]
> + ptr = mmap(NULL, alloc_size, PROT_READ | PROT_WRITE,
> + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
> + if (ptr == MAP_FAILED) {
> + perror("map() failed");
> + return -1;
> + }
> + memset(ptr, PATTERN, alloc_size);
> +
> + mirror_ptr = (char *) mremap(ptr, 0, alloc_size, MREMAP_MAYMOVE);
> + if (mirror_ptr == MAP_FAILED) {
> + perror("mremap() failed");
> + return -1;
> + }
What is the point of this test? It will break with Mike's patch very
soon. Btw. it never worked.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-07-25 13:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-25 6:36 Anshuman Khandual
2017-07-25 13:36 ` Michal Hocko [this message]
2017-07-26 4:24 ` Anshuman Khandual
2017-07-26 5:49 ` Michal Hocko
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