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Date: Wed, 15 Jun 2016 15:18:18 +0200
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From: "Herbert J. Skuhra" <herbert@mailbox.org>
To: Dmitry Morozovsky <marck@rinet.ru>
Cc: jhb@FreeBSD.org,
	freebsd-stable@FreeBSD.org
Subject: Re: MAXCPU @ stable/10
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Dmitry Morozovsky skrev:
> 
> John,
> this commit went into -current almost 2 years ago with "MFC After: 1 month" tag
> 
> Did something went wrong?
> 
> ------------------------------------------------------------------------
> r270223 | jhb | 2014-08-20 20:06:24 +0400 (Wed, 20 Aug 2014) | 5 lines
> 
> Bump MAXCPU on amd64 from 64 to 256.  In practice APIC only permits 255
> CPUs (IDs 0 through 254).  Getting above that limit requires x2APIC.
> 
> MFC after:      1 month
> 
> ------------------------------------------------------------------------

r284720 | kib | 2015-06-23 08:30:36 +0200 (tir, 23 jun 2015) | 9 lines

Revert part of the r283303 (by jhb):

Revert MFC of r270223, which bumped MAXCPU on amd64 from 64 to 256.
The cpuset_getaffinity(2) and cpuset_setaffinity(2) check minimum set
size, which now fails for binaries compiled on 10.0 with MAXCPU == 64.

Submitted by:   jhb
PR:       200802

--
Herbert