Re: [Toshiba IDE DMA BUG] Pinpointed version

From: Jamie Lokier (lk@tantalophile.demon.co.uk)
Date: Mon May 15 2000 - 13:28:28 EST


Lee Mitchell wrote:
> I found that with the 2.2.x kernel supplied with redhat 6.1, the machine ran
> ok, but on the 2.3.x kernels it would crash at random under heavy load. I
> eventually noticed that reguarly one of the registers displayed in the oops
> would contain nothing but FFFF's, so i thought i'd try telling the machine
> it only had 60 megs of ram to see if that fixed anything, and, sure enough,
> running 2.3.99-pre6 with the Lilo append="Mem=60M" line, its not crashed
> once.

Yes, there is a known problem with Toshiba notebooks & 2.3 memory
detection. It's been there for ages. Pavel Machek posted a tiny
"memory check" patch that at least crashes the kernel on boot instead of
corrupting your disk some random time later.

BTW, I use "mem=63M" and it's fine.

I believe the latest & greatest memory detection patch is supposed to
fix this, but it does not seem to have found its way into the tree.

-- Jamie

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