From: Peter Zijlstra <peterz@infradead.org>
To: Jiri Kosina <jkosina@suse.cz>
Cc: Adam Osuchowski <adwol@zonk.pl>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Nick Piggin <npiggin@suse.de>,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: Is 386 processor still supported?
Date: Thu, 08 Jan 2009 15:27:13 +0100 [thread overview]
Message-ID: <1231424833.11687.452.camel@twins> (raw)
In-Reply-To: <alpine.LNX.1.10.0901081518070.5377@jikos.suse.cz>
On Thu, 2009-01-08 at 15:21 +0100, Jiri Kosina wrote:
> On Thu, 8 Jan 2009, Peter Zijlstra wrote:
>
> > > Subject: x86: make spinlocks available on machines without xadd insn
> > > Current kernel wouldn't compile on ancient x86 machines that don't support
> > > xadd instruction, as ticket spinlocks implementation unconditionally uses
> > > it.
> > > On machines without CONFIG_X86_XADD, use old-style byte spinlock
> > > implementation instead.
> > afaik we don't support i386-smp and up spinlocks are trivial
> > preempt_disable() calls.
>
> Hmm. Where in Kconfig is SMP for M386 not allowed?
Dunno, kconfig is too much of a jungle for a simple person like me ;-)
But afaik i386 (and possibly i486) don't support nearly enough for a
modern SMP system.
Alan used to have i486-smp I think, one of the very few ever made.
next prev parent reply other threads:[~2009-01-08 14:27 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-08 12:03 Adam Osuchowski
2009-01-08 13:05 ` Jiri Kosina
2009-01-08 13:24 ` Cyrill Gorcunov
2009-01-08 13:48 ` Jiri Kosina
2009-01-08 14:13 ` Peter Zijlstra
2009-01-08 14:21 ` Jiri Kosina
2009-01-08 14:27 ` Peter Zijlstra [this message]
2009-01-08 15:04 ` Alan Cox
2009-01-08 15:10 ` Ingo Molnar
2009-01-13 1:06 ` Maciej W. Rozycki
2009-01-15 12:36 ` Jan-Benedict Glaw
2009-01-15 13:22 ` Maciej W. Rozycki
2009-01-15 13:32 ` Alan Cox
2009-01-15 14:15 ` Maciej W. Rozycki
2009-01-15 14:17 ` Ingo Molnar
2009-01-16 9:00 ` Pavel Machek
2009-01-16 10:13 ` Jan-Benedict Glaw
2009-01-16 11:18 ` Andrey Panin
2009-01-16 13:46 ` Ingo Molnar
2009-01-16 18:17 ` H. Peter Anvin
2009-01-15 14:20 ` Jan-Benedict Glaw
2009-01-15 14:37 ` Bastien ROUCARIES
2009-01-15 14:25 ` Alan Cox
2009-01-15 14:44 ` Maciej W. Rozycki
2009-01-15 20:11 ` H. Peter Anvin
2009-01-15 14:46 ` Jan-Benedict Glaw
2009-01-08 16:45 ` Sam Ravnborg
2009-01-08 16:27 ` Andi Kleen
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