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Message-ID: <877dyinzuz.fsf@mid.deneb.enyo.de>
Date: Tue, 14 Apr 2020 12:08:52 +0200
From: Florian Weimer <fw@...eb.enyo.de>
To: Rich Felker <dalias@...c.org>
Cc: musl@...ts.openwall.com, Norbert Lange <nolange79@...il.com>
Subject: Re: [BUG] sysconf implementing _SC_NPROCESSORS_(CONF|ONLN) incorrectly
* Rich Felker:
>> For glibc, we had to change our logic to artificially inflate the CPU
>> to 2 if we cannot determine it, as the more conservative choice.
>
> Wait, you mean some software is abusing these interfaces to omit
> memory barriers or something? *facepalm* *sigh*
Yes, indeed. glibc itself parses uname -v output for this purpose
(something we should probably remove, too).
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