From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olivier Matz <olivier.matz@6wind.com>
Subject: Re: [PATCH v3 00/35] mempool: rework memory allocation
Date: Mon, 13 Jun 2016 12:27:43 +0200
Message-ID: <575E8A9F.8080402@6wind.com>
References: <1460629199-32489-1-git-send-email-olivier.matz@6wind.com>
 <36612895.rbhkJEDisP@xps13> <9d61a426-f580-b39e-1e38-7a30a4937324@redhat.com>
 <2024350.zjYMIZz45a@xps13> <5742B4A0.7030309@6wind.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Cc: dev@dpdk.org
To: Thomas Monjalon <thomas.monjalon@6wind.com>,
 Panu Matilainen <pmatilai@redhat.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mail.droids-corp.org (zoll.droids-corp.org [94.23.50.67])
 by dpdk.org (Postfix) with ESMTP id A0A365594
 for <dev@dpdk.org>; Mon, 13 Jun 2016 12:27:49 +0200 (CEST)
In-Reply-To: <5742B4A0.7030309@6wind.com>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

Hi,

On 05/23/2016 09:43 AM, Olivier Matz wrote:
> Hi Panu, Thomas,
> 
> On 05/20/2016 11:09 AM, Thomas Monjalon wrote:
>> 2016-05-20 11:42, Panu Matilainen:
>>> Just noticed this series "breaks" --no-huge as a regular user, commit 
>>> 593a084afc2b to be exact:
>>>
>>> mmap(NULL, 4194304, PROT_READ|PROT_WRITE, 
>>> MAP_PRIVATE|MAP_ANONYMOUS|MAP_LOCKED, 0, 0) = -1 EAGAIN (Resource 
>>> temporarily unavailable)
>>> write(1, "EAL: rte_eal_hugepage_init: mmap"..., 76EAL: 
>>> rte_eal_hugepage_init: mmap() failed: Resource temporarily unavailable
>>>
>>> "Breaks" in quotes because I guess it always was broken (as the 
>>> non-locked pages might not be in physical memory) and because its
>>> possible to adjust resourse limits to allow the operation to succeed.
>>> If you're root, that is.
>>>
>>> I was just looking into making the test-suite runnable by a regular user 
>>> with no special privileges,
>>
>> I have the same dream, to make sure every developer can run the unit tests
>> easily and quickly.
> 
> Thanks Panu for the feedback on this, I didn't notice this regression
> for a regular user.
> 
> The goal of this commit was to do a step forward in the direction
> of a working --no-huge: locking the pages in physical memory is
> mandatory for most physical drivers. But as described at the end
> of http://dpdk.org/ml/archives/dev/2016-May/039229.html , the
> --no-huge option is still not working because the physical addresses
> are not correct.
> 
> So I think it wouldn't be a problem to revert this commit if it breaks
> something.

I've just sent a patch to fix that. Feel free to comment.
See http://www.dpdk.org/ml/archives/dev/2016-June/041051.html

Regards,
Olivier