WARNING - OLD ARCHIVES

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/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] (repeatable) cross-domain networking failure

To: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] (repeatable) cross-domain networking failure
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 18 Jan 2005 11:05:35 +0000
Cc: "mukesh agrawal" <xen.sourceforge.net@xxxxxxxxxxxxxxxxxxx>, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx, "Nivedita Singhvi" <niv@xxxxxxxxxx>
Delivery-date: Tue, 18 Jan 2005 11:12:03 +0000
Envelope-to: xen+James.Bulpin@xxxxxxxxxxxx
In-reply-to: Your message of "Mon, 17 Jan 2005 23:14:40 GMT." <A95E2296287EAD4EB592B5DEEFCE0E9D1233BF@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-archive: <http://sourceforge.net/mailarchive/forum.php?forum=xen-devel>
List-help: <mailto:xen-devel-request@lists.sourceforge.net?subject=help>
List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
List-post: <mailto:xen-devel@lists.sourceforge.net>
List-subscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=subscribe>
List-unsubscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=unsubscribe>
Sender: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx
> 
> OK, I have a good handle on the problem with UDP hangs into user-space
> of domain 0.
> 
> It's down to message size: if the UDP payload size is less than 24
> bytes, the buffer is not freed properly. Bizarre, but it explains why
> our regression tests weren't picking it up as they all use larger
> message sizes.
> 
> Anyhow, now we can reproduce, a fix should be forthcoming.
> 
> Ian
> 
 -=- MIME -=- 

OK, I have a good handle on the problem with UDP hangs into user-space
of domain 0.

It's down to message size: if the UDP payload size is less than 24
bytes, the buffer is not freed properly. Bizarre, but it explains why
our regression tests weren't picking it up as they all use larger
message sizes.

Anyhow, now we can reproduce, a fix should be forthcoming.

Ian


This bug is now (hopefully) fixed in the testing and unstable trees.

 -- Keir


-------------------------------------------------------
The SF.Net email is sponsored by: Beat the post-holiday blues
Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek.
It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel