From: Dave Jones <davej@codemonkey.org.uk>
To: "Matt D. Robinson" <yakker@aparity.com>
Cc: "Donepudi, Suneeta" <sdonepudi@3eti.com>,
"'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
Subject: Re: Kernel Panic during memcpy_toio to PCI card
Date: Fri, 1 Nov 2002 23:29:48 +0000 [thread overview]
Message-ID: <20021101232948.GA7650@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.44.0211011527460.27345-100000@nakedeye.aparity.com>
On Fri, Nov 01, 2002 at 03:28:10PM -0800, Matt D. Robinson wrote:
>It still caused the crash in the same manner and at the same location.
>Could someone help me with pointers to where I should start looking ?
>Disabling interrupts around the memcpy_toio() did not make any
>difference. Is this a hardware problem with the PCI card ? We are using
>a Xilinx core with out FPGA build into it.
memcpy_toio() in 2.4 is still using memcpy() which could use prefetch()
if you compile for certain processors. Prefetching io space could do
all sorts of nasties.
2.5 changed this define (in include/asm-i386/io.h) to use __memcpy
instead, which doesn't use prefetching.
Dave
Dave
--
| Dave Jones. http://www.codemonkey.org.uk
next prev parent reply other threads:[~2002-11-01 23:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-01 20:34 Kernel Panic during memcpy_toio to PCI card Donepudi, Suneeta
2002-11-01 23:28 ` Matt D. Robinson
2002-11-01 23:29 ` Dave Jones [this message]
2002-11-02 1:15 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2002-11-02 19:46 Donepudi, Suneeta
2002-11-01 20:06 Donepudi, Suneeta
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