svn commit: r326758 - in head/sys/i386: conf include

[Eugene Grosbein]

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.