This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


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

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] bug: slab corruption (net backend?)
From: Bin Ren <bin.ren@xxxxxxxxx>
Date: Mon, 11 Jul 2005 15:29:10 +0100
Cc: Gerd Knorr <kraxel@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Steven Hand <Steven.Hand@xxxxxxxxxxxx>
Delivery-date: Mon, 11 Jul 2005 14:27:56 +0000
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=aJJTfdyk9A/3VAmb6ymX8hU0EoIVxGs43l6d5hKdKjM1m1ax6QUrxklvoYRAo4h69M1cDwaAVrFTCvoTF0PpEFCc1zqwE6MTjtiTwTPOo3DJPKfphFskEswBPJSbfgl6TQS3v400chIjRrquYrfOaCIAjMtJ99LQPzMOucR1wn4=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <a776c5dde83e89353dc30ce76e4c67a6@xxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <20050707094132.GA29339@bytesex> <E1DqTLV-00068D-00@xxxxxxxxxxxxxxxxx> <20050707113514.GA30556@bytesex> <f9095f4e739734ec5b54796ebe6f31ae@xxxxxxxxxxxx> <20050707122242.GA31229@bytesex> <87br5ehi15.fsf@xxxxxxxxxxx> <42CD52F4.2010407@xxxxxxxxxx> <20050711132535.GB13297@bytesex> <a776c5dde83e89353dc30ce76e4c67a6@xxxxxxxxxxxx>
Reply-to: bin.ren@xxxxxxxxxxxx
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Not sure whether this is related or not. Interdomain NFS stops working
with the latest xen-unstable. Haven't taken a closer look though. Last
time the same thing happened was when checksum offloading was added.

- Bin

On 7/11/05, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
> On 11 Jul 2005, at 14:25, Gerd Knorr wrote:
> >> Can you disable tcp checksum offload (ethtool -K tx off) and see
> >> if you can reproduce this problem?
> >
> > Never seen that again since I've turned off CONFIG_SLAB_DEBUG,
> > which seems to be incompatible with the page mapping the xen
> > backend drivers do.
> Well, I'm not 100% sure of this. It looks like guard bytes aren;t
> placed around slab allocations when slab object size is near a power of
> two. But if guard header/footers are added to our skbuff data objects
> then yes: that will be broken for xen netback.
>   -- Keir
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

Xen-devel mailing list