Re: [Xen-devel] bug: slab corruption (net backend?)

[Steven Hand <Steven.Hand@xxxxxxxxxxxx>]

>With the small debug patch below and CONFIG_DEBUG_SLAB=y I get
>plenty of these messages in the dom0 kernel log as soon as I
>start a domU:
>
>  Slab corruption: start=dc423000, len=4096
>  Slab name: xen-skb
>  000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>
>This is hg1a7383f849896e60f8be631c96fa2b461f502615.
>
>any idea?

No, although I think this is a real bug -- I first observed it yesterday
after a few different changes went in; the most likely culprit is my 
change to the builder to move the store page to a different location..
but I think that change is correct (at least, the previous behaviour 
was certainly incorrect :-) 

One thing to check is what the underlying pfn and/or mfn is for the 
relevant slabs(s) which could point to an allocation issue. 

cheers,

S.

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