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Re: sometimes get "crc error" while uncompressed ramdisk

To: jp <jaypee@hotpop.com>
Subject: Re: sometimes get "crc error" while uncompressed ramdisk
From: zhuzhenhua <zzh.hust@gmail.com>
Date: Sat, 7 Jan 2006 11:39:32 +0800
Cc: linux-mips <linux-mips@linux-mips.org>
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On 1/6/06, jp <jaypee@hotpop.com> wrote:
> On Fri, 2006-01-06 at 14:40 +0800, zhuzhenhua wrote:
> > i make a ramdisk by myself, and sometimes the kernel boot the ramdisk
> > correctly but sometimes it printk "crc error" while uncompressed
> > ramdisk, did someone meet this situation?
> > thanks for any hints
> >
>
> Assuming your build and everything else is as it should be it may be a
> RAM fault. Are you using a custom board?
>
> I had some prototype boards here with some really long tracks to RAM.
> (and some really short ones too!)
>
> Memory tests such walking ones worked fine but the decompress of the
> ramdisk works RAM pretty hard and it showed up intermittent faults like
> you describe. Tended to be worse when the board was warm. I'd spray some
> Freezit on and it would go back to working OK.
>
> You could also try running the RAM slower and see if the fault
> disappears.
>
>
> JP
>
>
>
maybe you are right, because i work on our FPGA board, and the
situation is similiar as your description. i will try to slow down the
sdram and to see what will happen

thanks!

Best regards

zhuzhenhua

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