linux-kernel - Re: getting processor numbers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <46128F47.2010107@redhat.com>
Date:	Tue, 03 Apr 2007 10:30:47 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: getting processor numbers

Andi Kleen wrote:
> Topology is dependent on the number of CPUs.

Not all of it.


> Hot plugging is a completely orthogonal problem. Even your original
> proposal wouldn't address it.

Nonsense.  Reading /proc/cpuinfo or /sys/devices/system/cpu reflects the
current CPU count.  The information read would (and is not) cached, it's
re-read every time.  We might add very limited caching (for a few
seconds) but that's as much as we can go.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖


Download attachment "signature.asc" of type "application/pgp-signature" (252 bytes)