Date: Mon, 11 Dec 2017 19:52:38 +0100 From: Michael Tuexen <tuexen@fh-muenster.de> To: Eugene Grosbein <eugen@grosbein.net> Cc: Konstantin Belousov <kostikbel@gmail.com>, Conrad Meyer <cem@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r326758 - in head/sys/i386: conf include Message-ID: <7A052A1A-EFB4-489D-B8DF-C8080AD59A20@fh-muenster.de> In-Reply-To: <5A2EB072.6050803@grosbein.net> References: <201712110432.vBB4WbnE021090@repo.freebsd.org> <20171211091943.GF2272@kib.kiev.ua> <5A2E5D44.9030904@grosbein.net> <20171211105242.GH2272@kib.kiev.ua> <5A2E6608.5090205@grosbein.net> <20171211150827.GJ2272@kib.kiev.ua> <5A2EB072.6050803@grosbein.net>
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[-- Attachment #1 --]
> On 11. Dec 2017, at 17:21, Eugene Grosbein <eugen@grosbein.net> wrote:
>
> 11.12.2017 22:08, Konstantin Belousov пишет:
>> On Mon, Dec 11, 2017 at 06:03:36PM +0700, Eugene Grosbein wrote:
>>> I do not try to contradict other usage patterns. In fact, I'm eager to know
>>> a practical example of such pattern: a task, an application, anything real?
>> Plain workstation use, like X11+browser+editor+some other programs easily
>> allocates 1000+ threads. It was still possible to use 32bit x86 for that,
>> of course in max memory config without PAE, and without ZFS. Add some
>> load that involves network, for instance torrent client, to establish the
>> pressure on KVA.
>>
>> I am almost sure that users would get troubles now.
>
> Understood. While I'm sure that modern internet browsers make it unconfortable
> to browse with less than 4G total RAM (e.g. 2GB) available for the system thus requiring amd64,
> I can imagine some old hardware without 64bit-enabled CPU used as workstation.
>
> We should add Release Notes and UPDATING entry for such i386 users about
> setting "kern.kstack_pages=2" back in /boot/loader.conf (or 3?)
> and warn them against combined usage of ZFS/SCTP/IPSEC until these subsystems get fixed
> to not abuse kernel stack.
Not sure about IPSEC and ZFS. But I was NOT able to reproduce the issue by just using
an SCTP association on a 32-bit VM using FreeBSD 11.1. So right now I don't know what
is wrong and therefore what could be fixed...
Best regards
Michael
>
>
>
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