From: Ulrich Drepper <drepper@redhat.com>
To: root@chaos.analogic.com
Cc: Victor Zandy <zandy@cs.wisc.edu>,
linux-kernel@vger.kernel.org, pcroth@cs.wisc.edu,
epaulson@cs.wisc.edu
Subject: Re: BUG: Global FPU corruption in 2.2
Date: 20 Apr 2001 12:23:16 -0700 [thread overview]
Message-ID: <m3n19bs7dn.fsf@otr.mynet.cygnus.com> (raw)
In-Reply-To: <Pine.LNX.3.95.1010420145755.11087A-100000@chaos.analogic.com>
In-Reply-To: "Richard B. Johnson"'s message of "Fri, 20 Apr 2001 15:07:28 -0400 (EDT)"
"Richard B. Johnson" <root@chaos.analogic.com> writes:
> If it "fixes" it, there is no problem with the FPU, but with the
> 'C' runtime library which doesn't initialize the FPU to a known
> state before it uses it.
It's the kernel which initializes the FPU. This was always the case
and necessary to implement the fast lazy FPU saving/restoring.
Processes which never use the FPU never initialize it.
--
---------------. ,-. 1325 Chesapeake Terrace
Ulrich Drepper \ ,-------------------' \ Sunnyvale, CA 94089 USA
Red Hat `--' drepper at redhat.com `------------------------
next prev parent reply other threads:[~2001-04-20 19:24 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-19 16:05 BUG: Global FPU corruption in 2.2 Victor Zandy
2001-04-19 20:18 ` Michal Jaegermann
2001-04-20 18:50 ` Victor Zandy
2001-04-20 19:07 ` Richard B. Johnson
2001-04-20 19:20 ` Victor Zandy
2001-04-20 19:44 ` Richard B. Johnson
2001-04-20 19:23 ` Ulrich Drepper [this message]
2001-04-20 19:37 ` Richard B. Johnson
2001-04-20 20:20 ` Victor Zandy
2001-04-20 21:44 ` Ulrich Drepper
2001-04-22 1:46 ` Richard B. Johnson
2001-04-22 2:18 ` Alan Cox
2001-04-22 2:30 ` Richard B. Johnson
2001-04-22 18:39 ` David Konerding
2001-04-22 18:59 ` Alan Cox
2001-04-22 20:59 ` kees
2001-04-23 16:11 ` Christian Ehrhardt
2001-04-24 16:10 ` Linus Torvalds
2001-04-24 16:25 ` Alan Cox
2001-04-24 16:56 ` Christian Ehrhardt
2001-04-24 20:15 ` Michal Jaegermann
2001-04-24 19:49 ` BUG: USB/Reboot Collectively Unconscious
2001-04-24 21:41 ` Alan Cox
2001-04-25 12:37 ` Collectively Unconscious
2001-04-30 22:46 ` Alan Cox
2001-04-27 12:18 ` Collectively Unconscious
2001-04-23 18:44 ` BUG: Global FPU corruption in 2.2 Erik Paulson
2001-04-24 5:33 alad
2001-04-24 7:56 alad
2001-04-24 8:56 alad
2001-04-24 13:05 Victor Zandy
2001-04-24 16:24 ` Linus Torvalds
2001-04-24 16:47 ` Christian Ehrhardt
2001-04-24 18:09 ` Victor Zandy
2001-04-24 18:21 Victor Zandy
2001-04-24 18:37 ` Alan Cox
2001-04-24 19:17 ` Victor Zandy
2001-04-24 19:51 ` Alan Cox
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