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From: Jamie Lokier <jamie@shareable.org>
To: Andre Puschmann <andre.puschmann@imms.de>
Cc: Arnaud Mouiche <arnaud.mouiche@thomson.net>,
	linux-mtd@lists.infradead.org
Subject: Re: flash read performance
Date: Tue, 4 Nov 2008 11:42:29 +0000	[thread overview]
Message-ID: <20081104114229.GA1673@shareable.org> (raw)
In-Reply-To: <490F096D.5060208@imms.de>

Andre Puschmann wrote:
> Hi,
> 
> I spent some more time on this issue and investigated some mtd-maps
> drivers.
> The kernel I am using is a 2.6.21 that comes out of the gumstix 
> svn-repo. Unfortunately, it uses a legacy driver which only does a
> ioremap() but no ioremap_nocache(). Patching the driver with this
> additional call boosts up transfers up to around 5.5MB/s, which
> is a fairly improvement.
> I will send a patch to the gumstix list. Users of newer kernel might
> not need this, as they use a newer driver (pxa2xx-flash.c) anyway.

I don't know much about this area, but will _writing_ to the flash
work reliably if ioremap_cached() is used?

-- Jamie

  parent reply	other threads:[~2008-11-04 11:42 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-28 10:14 flash read performance Andre Puschmann
2008-10-29 11:42 ` Josh Boyer
2008-10-29 12:03   ` Jamie Lokier
2008-10-29 15:52   ` Andre Puschmann
2008-10-30  8:33     ` Arnaud Mouiche
2008-10-30  9:52       ` Andre Puschmann
2008-10-30 10:06         ` Arnaud Mouiche
2008-11-03 14:23           ` Andre Puschmann
2008-11-04  8:30             ` Andre Puschmann
2008-11-04 11:42             ` Jamie Lokier [this message]
2008-11-04 14:31               ` Andre Puschman
2008-11-07  2:41                 ` Trent Piepho
2008-11-07  4:02                   ` Jamie Lokier
2008-11-07  5:36                     ` Trent Piepho
2008-11-07  5:57                       ` Jamie Lokier
2008-11-07  9:47                   ` Andre Puschmann
2008-11-08  5:28                     ` Trent Piepho
2008-11-11 13:28                       ` Andre Puschmann
2008-11-15  2:02                         ` Trent Piepho

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