All of lore.kernel.org
 help / color / mirror / Atom feed
From: Oleg Nesterov <oleg@redhat.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Hugh Dickins <hughd@google.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Jan Kratochvil <jan.kratochvil@redhat.com>,
	Sergio Durigan Junior <sergiodj@redhat.com>,
	GDB Patches <gdb-patches@sourceware.org>,
	Pedro Alves <palves@redhat.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: install_special_mapping && vm_pgoff (Was: vvar, gup && coredump)
Date: Mon, 16 Mar 2015 20:44:46 +0100	[thread overview]
Message-ID: <20150316194446.GA21791@redhat.com> (raw)
In-Reply-To: <CALCETrU9pLE2x3+vei1xw6B8uu4B33DOEzP03ue9DeS8sJhYUg@mail.gmail.com>

On 03/16, Andy Lutomirski wrote:
>
> Ick, you're probably right.  For what it's worth, the vdso *seems* to
> be okay (on 64-bit only, and only if you don't poke at it too hard) if
> you mremap it in one piece.  CRIU does that.

I need to run away till tomorrow, but looking at this code even if "one piece"
case doesn't look right if it was cow'ed. I'll verify tomorrow.

Oleg.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

WARNING: multiple messages have this Message-ID (diff)
From: Oleg Nesterov <oleg@redhat.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Hugh Dickins <hughd@google.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Jan Kratochvil <jan.kratochvil@redhat.com>,
	Sergio Durigan Junior <sergiodj@redhat.com>,
	GDB Patches <gdb-patches@sourceware.org>,
	Pedro Alves <palves@redhat.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: install_special_mapping && vm_pgoff (Was: vvar, gup && coredump)
Date: Mon, 16 Mar 2015 20:44:46 +0100	[thread overview]
Message-ID: <20150316194446.GA21791@redhat.com> (raw)
In-Reply-To: <CALCETrU9pLE2x3+vei1xw6B8uu4B33DOEzP03ue9DeS8sJhYUg@mail.gmail.com>

On 03/16, Andy Lutomirski wrote:
>
> Ick, you're probably right.  For what it's worth, the vdso *seems* to
> be okay (on 64-bit only, and only if you don't poke at it too hard) if
> you mremap it in one piece.  CRIU does that.

I need to run away till tomorrow, but looking at this code even if "one piece"
case doesn't look right if it was cow'ed. I'll verify tomorrow.

Oleg.


  reply	other threads:[~2015-03-16 20:26 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <878ufc9kau.fsf@redhat.com>
     [not found] ` <20150305154827.GA9441@host1.jankratochvil.net>
     [not found]   ` <87zj7r5fpz.fsf@redhat.com>
     [not found]     ` <20150305205744.GA13165@host1.jankratochvil.net>
     [not found]       ` <20150311200052.GA22654@redhat.com>
2015-03-12 14:34         ` vvar, gup && coredump Oleg Nesterov
2015-03-12 16:29           ` Andy Lutomirski
2015-03-12 16:54             ` Oleg Nesterov
2015-03-12 17:17               ` Andy Lutomirski
2015-03-12 17:39                 ` Oleg Nesterov
2015-03-12 17:45                   ` Sergio Durigan Junior
2015-03-12 18:02                     ` Oleg Nesterov
2015-03-13  4:50                       ` Sergio Durigan Junior
2015-03-13 15:04                         ` Oleg Nesterov
2015-03-12 17:55                   ` Andy Lutomirski
2015-03-12 18:08                     ` Oleg Nesterov
2015-03-12 18:33                       ` Andy Lutomirski
2015-03-13 15:22                         ` Oleg Nesterov
2015-03-12 17:46               ` Oleg Nesterov
2015-03-12 17:54                 ` Andy Lutomirski
2015-03-12 18:05                   ` Oleg Nesterov
2015-03-12 18:23                     ` Sergio Durigan Junior
2015-03-12 18:19                 ` Pedro Alves
2015-03-12 18:25                   ` Andy Lutomirski
2015-03-16 19:01                 ` install_special_mapping && vm_pgoff (Was: vvar, gup && coredump) Oleg Nesterov
2015-03-16 19:20                   ` Andy Lutomirski
2015-03-16 19:20                     ` Andy Lutomirski
2015-03-16 19:44                     ` Oleg Nesterov [this message]
2015-03-16 19:44                       ` Oleg Nesterov
2015-03-17 13:43                       ` Oleg Nesterov
2015-03-17 13:43                         ` Oleg Nesterov
2015-03-18  1:44                         ` Andy Lutomirski
2015-03-18  1:44                           ` Andy Lutomirski
2015-03-18 18:06                           ` Oleg Nesterov
2015-03-18 18:06                             ` Oleg Nesterov
2015-03-16 19:40                   ` Pedro Alves

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20150316194446.GA21791@redhat.com \
    --to=oleg@redhat.com \
    --cc=gdb-patches@sourceware.org \
    --cc=hughd@google.com \
    --cc=jan.kratochvil@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=luto@amacapital.net \
    --cc=palves@redhat.com \
    --cc=sergiodj@redhat.com \
    --cc=torvalds@linux-foundation.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.