From: Philippe Gerum <rpm@xenomai.org>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>
Subject: Re: [Xenomai] Default options in the debian package
Date: Tue, 23 Apr 2013 15:03:24 +0200 [thread overview]
Message-ID: <5176869C.6030907@xenomai.org> (raw)
In-Reply-To: <517684C3.2090607@siemens.com>
On 04/23/2013 02:55 PM, Jan Kiszka wrote:
> On 2013-04-23 14:40, Philippe Gerum wrote:
>>> Well, we have --enable-posix-auto-mlockall for that. But you are right,
>>> we get rid of all this and enable automatic mlockall for all skins. I do
>>> not see any drawbacks.
>>>
>>>
>>
>> From the dept of Xenomai archive: the original intent of controlling
>> when and how memory locking is done was to address this bug with very
>> old kernels:
>>
>> http://lkml.indiana.edu/hypermail/linux/kernel/0310.0/0649.html
>>
>> Back then, apps mmapping I/O space would then mlock(MCL_CURRENT),
>> mmap(I/O space), then mlock(MCL_FUTURE) to work around this bug manually.
>>
>
> Interesting - but luckily no longer relevant. :)
>
Agreed.
--
Philippe.
next prev parent reply other threads:[~2013-04-23 13:03 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-19 11:46 [Xenomai] Default options in the debian package Leopold Palomo-Avellaneda
2013-04-19 12:48 ` Jan Kiszka
2013-04-19 19:06 ` Gilles Chanteperdrix
2013-04-20 6:04 ` Michael Haberler
2013-04-20 8:19 ` Jan Kiszka
2013-04-20 15:14 ` Gilles Chanteperdrix
2013-04-20 15:18 ` Jan Kiszka
2013-04-20 15:21 ` Gilles Chanteperdrix
2013-04-20 15:27 ` Jan Kiszka
2013-04-20 15:30 ` Gilles Chanteperdrix
2013-04-22 7:11 ` Jan Kiszka
2013-04-22 11:37 ` Gilles Chanteperdrix
2013-04-22 13:42 ` Jan Kiszka
2013-04-22 18:57 ` Gilles Chanteperdrix
2013-04-23 8:21 ` Jan Kiszka
2013-04-23 11:20 ` Gilles Chanteperdrix
2013-04-23 12:22 ` Jan Kiszka
2013-04-23 12:40 ` Philippe Gerum
2013-04-23 12:55 ` Jan Kiszka
2013-04-23 13:03 ` Philippe Gerum [this message]
2013-04-22 15:15 ` Jeff Webb
2013-04-22 7:18 ` Leopold Palomo-Avellaneda
2013-04-22 11:42 ` Gilles Chanteperdrix
2013-04-22 14:54 ` Leopold Palomo-Avellaneda
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