From: Benjamin Herrenschmidt <bh40@calva.net>
To: Gabriel Paubert <paubert@iram.es>, linuxppc-dev@lists.linuxppc.org
Subject: Re: Latest OpenPic changes
Date: Fri, 11 Feb 2000 19:38:08 +0100 [thread overview]
Message-ID: <20000211193808.018868@mailhost.mipsys.com> (raw)
In-Reply-To: <Pine.HPX.4.10.10002111837290.1866-100000@gra-ux1.iram.es>
On Fri, Feb 11, 2000, Gabriel Paubert <paubert@iram.es> wrote:
>If it's truly the case we should consider a different solution. Masking
>interrupts in a device or controller for a very short lapse is dominated
>by the HW access overhead, and this is bad. sync instructions are also
>extremely bad.
I implemented it in both enable and disable for "correctness" so that the
status of the controller is guaranteed when exiting any of those 2
functions. I agree that the unmask case may not be important.
I beleive the sync here can also be completely removed too. A single
eieio is plenty enough because of the read. Isn't it ?
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-02-11 18:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-02-11 16:43 Latest OpenPic changes Geert Uytterhoeven
2000-02-11 17:05 ` Benjamin Herrenschmidt
2000-02-11 17:16 ` Geert Uytterhoeven
2000-02-11 17:11 ` Gabriel Paubert
2000-02-11 17:16 ` Geert Uytterhoeven
2000-02-11 17:30 ` Gabriel Paubert
2000-02-11 21:17 ` Cort Dougan
2000-02-11 17:31 ` Benjamin Herrenschmidt
2000-02-11 17:49 ` Gabriel Paubert
2000-02-11 18:38 ` Benjamin Herrenschmidt [this message]
2000-02-11 20:25 ` Gabriel Paubert
2000-02-12 14:15 ` BenH
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