From: David Woodhouse <dwmw2@infradead.org>
To: Wolfgang Denk <wd@denx.de>
Cc: Paul Nash <paulnash@wildseed.com>,
"Linux-MTD (E-mail)" <linux-mtd@lists.infradead.org>
Subject: Re: Intel sez: Synchronous Flash and XIP is the future -- thoughts?
Date: Mon, 16 Dec 2002 11:45:49 +0000 [thread overview]
Message-ID: <18190.1040039149@passion.cambridge.redhat.com> (raw)
In-Reply-To: <20021216095652.D4D24C6139@atlas.denx.de>
wd@denx.de said:
> Running the kernel XIP is not so insane. It can help to reduce boot
> time. We still more than 3 seconds from power-on to application
> start, which is not so bad, but still too much in some cases;
> avoiding the memcpy() of some 2 MB of data is kind of attractive
> then...
That's true, although even if you have the kernel on a separate flash chip
to which you don't ever write, it does cost you later because you then run
from flash which is slower than RAM. I wonder if we could copy the kernel
from flash to RAM at runtime and fix up the page tables as we go, to get the
best of both worlds?
--
dwmw2
next prev parent reply other threads:[~2002-12-16 11:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-16 2:51 Intel sez: Synchronous Flash and XIP is the future -- thoughts? Paul Nash
2002-12-16 9:07 ` David Woodhouse
2002-12-16 9:27 ` Wolfgang Denk
2002-12-16 9:38 ` David Woodhouse
2002-12-16 9:56 ` Wolfgang Denk
2002-12-16 11:45 ` David Woodhouse [this message]
2002-12-16 17:21 ` Nicolas Pitre
2002-12-16 17:38 ` David Woodhouse
2002-12-16 18:06 ` Nicolas Pitre
2002-12-16 17:43 ` Wolfgang Denk
2002-12-16 18:07 ` Nicolas Pitre
2002-12-16 21:02 ` Charles Manning
2002-12-16 21:21 ` Russ Dill
2002-12-16 23:18 ` Charles Manning
2002-12-16 11:04 ` Michal Schulz
2002-12-16 11:16 ` Wolfgang Denk
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