From: Michal Hocko <mhocko@kernel.org>
To: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>,
linux-man@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Jann Horn <jannh@google.com>, Florian Weimer <fweimer@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Vlastimil Babka <vbabka@suse.cz>,
Anshuman Khandual <khandual@linux.vnet.ibm.com>
Subject: Re: [patch v2] mremap.2: Add description of old_size == 0 functionality
Date: Mon, 25 Sep 2017 14:36:21 +0200 [thread overview]
Message-ID: <20170925123621.35godwzhvw4wbisc@dhcp22.suse.cz> (raw)
In-Reply-To: <6fafdae8-4fea-c967-f5cd-d22c205608fa@gmail.com>
On Wed 20-09-17 09:25:42, Michael Kerrisk wrote:
[...]
> BUGS
> Before Linux 4.14, if old_size was zero and the mapping referred
> to by old_address was a private mapping (mmap(2) MAP_PRIVATE),
> mremap() created a new private mapping unrelated to the original
> mapping. This behavior was unintended and probably unexpected in
> user-space applications (since the intention of mremap() is to
> create a new mapping based on the original mapping). Since Linux
> 4.14, mremap() fails with the error EINVAL in this scenario.
>
> Does that seem okay?
sorry to be late but yes this wording makes perfect sense to me.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-09-25 12:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170915213745.6821-1-mike.kravetz@oracle.com>
2017-09-15 21:53 ` [patch] " Mike Kravetz
2017-09-18 13:45 ` Florian Weimer
2017-09-18 17:11 ` Mike Kravetz
2017-09-19 12:11 ` Florian Weimer
2017-09-19 21:42 ` [patch v2] " Mike Kravetz
2017-09-20 7:25 ` Michael Kerrisk (man-pages)
2017-09-25 12:36 ` Michal Hocko [this message]
2017-09-25 12:40 ` Michael Kerrisk (man-pages)
2017-09-25 16:33 ` Mike Kravetz
2017-09-25 19:26 ` Michael Kerrisk (man-pages)
2017-09-25 12:35 ` [patch] " Michal Hocko
2017-09-25 12:40 ` Florian Weimer
2017-09-25 12:52 ` Michal Hocko
2017-09-25 13:16 ` Florian Weimer
2017-09-25 14:52 ` Michal Hocko
2017-09-25 14:54 ` Florian Weimer
2017-09-18 1:52 ` Jann Horn
2017-09-18 17:19 ` Mike Kravetz
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