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Date: Mon, 16 Mar 2015 19:40:00 -0000
From: Pedro Alves <palves@redhat.com>
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To: Oleg Nesterov <oleg@redhat.com>, Andy Lutomirski <luto@amacapital.net>,        Hugh Dickins <hughd@google.com>,        Linus Torvalds <torvalds@linux-foundation.org>
CC: Jan Kratochvil <jan.kratochvil@redhat.com>,        Sergio Durigan Junior <sergiodj@redhat.com>,        GDB Patches <gdb-patches@sourceware.org>,        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: install_special_mapping && vm_pgoff (Was: vvar, gup && coredump)
References: <878ufc9kau.fsf@redhat.com> <20150305154827.GA9441@host1.jankratochvil.net> <87zj7r5fpz.fsf@redhat.com> <20150305205744.GA13165@host1.jankratochvil.net> <20150311200052.GA22654@redhat.com> <20150312143438.GA4338@redhat.com> <CALCETrW5rmAHutzm_OwK2LTd_J0XByV3pvWGyW=AmC=v7rLfhQ@mail.gmail.com> <20150312165423.GA10073@redhat.com> <20150312174653.GA13086@redhat.com> <20150316190154.GA18472@redhat.com>
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Thanks for looking over all this, guys.  Really appreciated.

On 03/16/2015 07:01 PM, Oleg Nesterov wrote:
> is wrong. To verify, I changed show_map_vma() to expose pgoff even if !file,
> but this test-case can show the problem too:

Might be good to add tests like this to selftests/ once all
this is sorted.

Pedro Alves