From: Thomas Gleixner <tglx@linutronix.de>
To: David Woodhouse <dwmw2@infradead.org>
Cc: linux-mtd@lists.infradead.org
Cc: "J.D. Bakker" <bakker@thorgal.et.tudelft.nl>
Subject: Re: Handling multiple NAND chips
Date: Sat, 26 Jul 2003 19:20:03 +0200 [thread overview]
Message-ID: <200307261920.03702.tglx@linutronix.de> (raw)
In-Reply-To: <1059232112.539.5.camel@lapdancer.baythorne.internal>
On Saturday 26 July 2003 17:08, David Woodhouse wrote:
> On Sat, 2003-07-26 at 07:39, Thomas Gleixner wrote:
> > You can do this, but the question is, if it is really an advantage.
>
> Dunno. In general, interrupt-driven operation is an advantage over
> polling -- it lets us get on with something else while we're waiting for
> the flash, and come straight back to the flash driver when it's done.
> Given the latencies involved on NAND, though, it might not really be
> worth the effort -- but I'd like to investigate.
For write it has really no advantage. All chips I have tested so far work near
the min. timings.
For erase it could be useful, as it can last a little bit longer. But I know
for sure, that the current yield and some polling code has better performance
than most ide drives.
--
Thomas
________________________________________________________________________
linutronix - competence in embedded & realtime linux
http://www.linutronix.de
mail: tglx@linutronix.de
next prev parent reply other threads:[~2003-07-26 16:23 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-25 15:12 Handling multiple NAND chips J.D. Bakker
2003-07-25 15:36 ` David Woodhouse
2003-07-25 15:51 ` J.D. Bakker
2003-07-25 15:56 ` David Woodhouse
2003-07-26 10:22 ` J.D. Bakker
2003-07-26 11:39 ` Thomas Gleixner
2003-07-26 15:08 ` David Woodhouse
2003-07-26 17:20 ` Thomas Gleixner [this message]
2003-07-26 15:06 ` David Woodhouse
2003-07-26 18:20 ` J.D. Bakker
2003-07-26 19:05 ` David Woodhouse
2003-07-27 12:54 ` J.D. Bakker
2003-07-27 13:42 ` David Woodhouse
2003-07-27 13:58 ` J.D. Bakker
2003-07-27 16:28 ` David Woodhouse
2003-07-25 15:51 ` David Woodhouse
2003-07-26 0:27 ` Charles Manning
2003-07-26 10:32 ` J.D. Bakker
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