From: Ingo Molnar <mingo@redhat.com>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Pavel Machek <pavel@ucw.cz>,
kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@zip.com.au>,
mingo@elte.hu
Subject: Re: Cleanups for APIC
Date: Thu, 27 May 2004 09:34:52 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.58.0405270931040.28319@devserv.devel.redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.55.0405271525140.10917@jurand.ds.pg.gda.pl>
On Thu, 27 May 2004, Maciej W. Rozycki wrote:
> > (wrt. io_apic_sync(): i added it in 2.1.104 together with some other
> > changes - i dont this it's necessary anymore - the local APICs had
> > writearound erratas, but i dont remember this ever being necessary for
> > IO-APICs. I'll address this in another patch.)
>
> Hmm, isn't that needed to make sure the iomem writeback is completed
> before exiting the caller?
the only thing that could happen is a POST delay in the PCI chipset - but
is that really an issue? Plus we only do the io_apic_sync() for the
masking, not the unmasking - so if it's needed then we dont do it
consistently.
Ingo
next prev parent reply other threads:[~2004-05-27 13:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-25 12:49 Pavel Machek
2004-05-27 13:15 ` Ingo Molnar
2004-05-27 13:30 ` Maciej W. Rozycki
2004-05-27 13:34 ` Ingo Molnar [this message]
2004-05-27 14:03 ` Maciej W. Rozycki
2004-05-27 14:14 ` Ingo Molnar
2004-05-27 14:26 ` Maciej W. Rozycki
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