Re: vmscan.c:196: bad pmd (kernel 2.4.25)
From: Willy Tarreau
Date: Thu Dec 07 2006 - 00:39:31 EST
Hi,
On Wed, Dec 06, 2006 at 09:22:29AM +0100, Jesper Juhl wrote:
> The following messages just showed up in dmesg on one of my servers.
> The server seems to be running fine but I would like to know if
> there's a real problem here or if the message is just noise.
>
> The server is running 2.4.25
>
> vmscan.c:196: bad pmd 000001e3.
> vmscan.c:196: bad pmd 004001e3.
...
> vmscan.c:196: bad pmd 378001e3.
> vmscan.c:196: bad pmd 37c001e3.
I may be wrong, but to me it looks either like memory corruption
affecting one pgd, and by extension all of its pmds, or an old
bug in 2.4.25, but I don't recall seeing such a thing.
Anyway, I would personally reboot the server after such a thing, as I
really don't like it when VM is going mad.
Regards,
Willy
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