From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1752513Ab2LTEHb (ORCPT <rfc822;w@1wt.eu>);
	Wed, 19 Dec 2012 23:07:31 -0500
Received: from relay.parallels.com ([195.214.232.42]:36958 "EHLO
	relay.parallels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752251Ab2LTEHY convert rfc822-to-8bit (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Wed, 19 Dec 2012 23:07:24 -0500
Message-ID: <50D28EC8.7000708@parallels.com>
Date: Thu, 20 Dec 2012 08:06:32 +0400
From: Stanislav Kinsbursky <skinsbursky@parallels.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0
MIME-Version: 1.0
To: Andrew Morton <akpm@linux-foundation.org>
CC: <serge.hallyn@canonical.com>, <ebiederm@xmission.com>,
        <linux-kernel@vger.kernel.org>, <xemul@parallels.com>,
        <catalin.marinas@arm.com>, <will.deacon@arm.com>, <jmorris@namei.org>,
        <cmetcalf@tilera.com>, <joe.korty@ccur.com>, <dhowells@redhat.com>,
        <dledford@redhat.com>, <viro@zeniv.linux.org.uk>,
        <kosaki.motohiro@jp.fujitsu.com>, <linux-api@vger.kernel.org>,
        <serue@us.ibm.com>, <tglx@linutronix.de>, <paulmck@linux.vnet.ibm.com>,
        <devel@openvz.org>, <mtk.manpages@gmail.com>,
        Sasha Levin <sasha.levin@oracle.com>,
        Wu Fengguang <fengguang.wu@intel.com>
Subject: Re: [RFC PATCH v8 0/5] IPC: checkpoint/restore in userspace enhancements
References: <20121024151555.5642.79086.stgit@localhost.localdomain> <20121218123601.113a29c0.akpm@linux-foundation.org>
In-Reply-To: <20121218123601.113a29c0.akpm@linux-foundation.org>
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Transfer-Encoding: 8BIT
X-Originating-IP: [69.7.221.19]
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

19.12.2012 00:36, Andrew Morton пишет:
> On Wed, 24 Oct 2012 19:34:51 +0400
> Stanislav Kinsbursky <skinsbursky@parallels.com> wrote:
>
>> This respin of the patch set was significantly reworked. Most part of new API
>> was replaced by sysctls (by one per messages, semaphores and shared memory),
>> allowing to preset desired id for next new IPC object.
>>
>> This patch set is aimed to provide additional functionality for all IPC
>> objects, which is required for migration of these objects by user-space
>> checkpoint/restore utils (CRIU).
>>
>> The main problem here was impossibility to set up object id. This patch set
>> solves the problem by adding new sysctls for preset of desired id for new IPC
>> object.
>>
>> Another problem was to peek messages from queues without deleting them.
>> This was achived by introducing of new MSG_COPY flag for sys_msgrcv(). If
>> MSG_COPY flag is set, then msgtyp is interpreted as message number.
> According to my extensive records, Sasha hit a bug in
> ipc-message-queue-copy-feature-introduced.patch and Fengguang found a
> bug in
> ipc-message-queue-copy-feature-introduced-cleanup-do_msgrcv-aroung-msg_copy-feature.patch
>
> It's not obvious (to me) that these things have been identified and
> fixed.  What's the status, please?

Hello, Andrew.
Fengguang's issue was solved by "ipc: simplify message copying" I sent you.
But I can't find Sasha's issue. As I remember, there was some problem in 
early
version of the patch set. But I believe its fixed now.