From: Martin Mares <mj@ucw.cz>
To: Jon Smirl <jonsmirl@yahoo.com>
Cc: Matthew Wilcox <willy@debian.org>,
Jesse Barnes <jbarnes@engr.sgi.com>,
Christoph Hellwig <hch@infradead.org>,
lkml <linux-kernel@vger.kernel.org>,
linux-pci@atrey.karlin.mff.cuni.cz,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: Exposing ROM's though sysfs
Date: Fri, 30 Jul 2004 22:10:52 +0200 [thread overview]
Message-ID: <20040730201052.GA5249@ucw.cz> (raw)
In-Reply-To: <20040730200359.80825.qmail@web14922.mail.yahoo.com>
Hello!
> So normal hardware would never ask for the cache since it isn't needed.
> In the normal hardware case direct ROM access is used. If the
> minimalistic hardware is using a user space driver it won't ask for the
> cache either. The only time you get cached is on minimal hardware and
> when the driver asks for it. Since the driver is asking for the cache
> you have to assume that it needs it so the memory isn't wasted.
No, we are speaking about sysfs access to the ROM and the driver itself
is unable to predict whether anybody will ever want to use that sysfs file,
so it would have to cache always.
Do I understand it correctly that the ROM-in-sysfs hack is intended only
for debugging? If it is so, I do not see why we should do anything complicated
in order to avoid root shooting himself in the foot.
Have a nice fortnight
--
Martin `MJ' Mares <mj@ucw.cz> http://atrey.karlin.mff.cuni.cz/~mj/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
Immanuel doesn't pun, he Kant.
next prev parent reply other threads:[~2004-07-30 20:11 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-30 16:53 Exposing ROM's though sysfs Jon Smirl
2004-07-30 17:10 ` Jesse Barnes
2004-07-30 17:19 ` Jesse Barnes
2004-07-30 17:24 ` Christoph Hellwig
2004-07-30 17:57 ` Jesse Barnes
2004-07-30 18:06 ` Jesse Barnes
2004-07-30 18:12 ` Matthew Wilcox
2004-07-30 18:12 ` Jesse Barnes
2004-07-30 18:20 ` Martin Mares
2004-07-30 18:49 ` Jesse Barnes
2004-07-30 19:55 ` Greg KH
2004-07-30 20:05 ` Jon Smirl
2004-07-30 20:16 ` Jesse Barnes
2004-07-30 20:29 ` Greg KH
2004-07-30 18:59 ` Jon Smirl
2004-07-30 19:04 ` Matthew Wilcox
2004-07-30 19:30 ` Jon Smirl
2004-07-30 19:35 ` Martin Mares
2004-07-30 19:39 ` Jon Smirl
2004-07-30 19:46 ` Martin Mares
2004-07-30 20:03 ` Jon Smirl
2004-07-30 20:10 ` Martin Mares [this message]
2004-07-30 20:13 ` Martin Mares
2004-07-30 20:25 ` Jesse Barnes
2004-07-30 20:32 ` Jon Smirl
2004-07-30 20:41 ` Martin Mares
2004-07-30 20:49 ` Jesse Barnes
2004-07-30 20:54 ` Martin Mares
2004-07-30 21:00 ` Jesse Barnes
2004-07-30 21:07 ` Jon Smirl
2004-07-30 21:12 ` Jesse Barnes
2004-07-30 19:47 ` Vojtech Pavlik
2004-07-30 22:18 ` Thomas Bogendoerfer
2004-07-30 22:39 ` Alan Cox
2004-07-30 19:25 ` Jon Smirl
2004-07-30 19:35 ` Vojtech Pavlik
2004-07-30 19:41 ` Jon Smirl
2004-07-30 19:48 ` Vojtech Pavlik
2004-07-30 20:20 ` Jesse Barnes
2004-07-30 22:41 ` Alan Cox
[not found] <1091207136.2762.181.camel@rohan.arnor.net>
2004-07-30 17:24 ` Jon Smirl
2004-07-30 19:14 ` Vojtech Pavlik
2004-07-30 20:26 ` Jesse Barnes
2004-07-30 22:36 ` Alan Cox
2004-08-03 21:41 ` Benjamin Herrenschmidt
2004-08-04 0:55 ` Jesse Barnes
2004-08-04 0:59 ` Benjamin Herrenschmidt
2004-08-04 1:37 ` Jon Smirl
2004-08-04 1:57 ` Benjamin Herrenschmidt
2004-08-04 2:16 ` Jesse Barnes
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