From: Brian Norris <computersforpeace@gmail.com>
To: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: linux-mtd@lists.infradead.org,
Maxime Ripard <maxime.ripard@free-electrons.com>,
David Woodhouse <dwmw2@infradead.org>,
linux-kernel@vger.kernel.org,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Subject: Re: [PATCH v2] mtd: pxa3xx-nand: handle PIO in threaded interrupt
Date: Sat, 28 Feb 2015 01:15:52 -0800 [thread overview]
Message-ID: <20150228091552.GA12966@brian-ubuntu> (raw)
In-Reply-To: <1424457403-6669-1-git-send-email-robert.jarzmik@free.fr>
On Fri, Feb 20, 2015 at 07:36:43PM +0100, Robert Jarzmik wrote:
> Change the handling of the data stage in the driver : don't pump data in
> the top-half interrupt, but rather schedule a thread for non dma cases.
>
> This will enable latencies in the data pumping, especially if delays are
> required. Moreover platform shall be more reactive as other interrupts
> can be served while pumping data.
>
> No throughput degradation was observed, at least on the zylonite
> platform, while a slight degradation was being expected.
>
> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
> Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
> Since v1: use IRQF_ONESHOT per Maxime's comment
Pushed to l2-mtd.git. Thanks.
Brian
prev parent reply other threads:[~2015-02-28 9:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-20 18:36 [PATCH v2] mtd: pxa3xx-nand: handle PIO in threaded interrupt Robert Jarzmik
2015-02-28 9:15 ` Brian Norris [this message]
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