Re: [Xen-devel] Regression with Xen 4.1.5 (cs 23459 compared to cs 23431)

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2013-02-21 at 13:00 +0000, Konrad Rzeszutek Wilk wrote:
> Hey,
> 
> So I tried to start an PV guest with Fri Feb 15 15:31:55 2013 +0100 
> 23459:9f12bdd6b7f0
> and I kept on getting:
> xc: error: panic: xc_dom_core.c:315: xc_dom_do_gunzip: inflate failed 
> (rc=-3): Internal error
> 
> Then rebuilt it with cs 23431 and it booted fine. Hadn't tried any specific
> bisection but any thoughts off which one I ought to try out first?

Tools changesets in that range are:
        $ hg log -r  23431:23459 tools/
        changeset:   23452:47c7b8531923
        user:        Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
        date:        Thu Feb 07 14:26:29 2013 +0000
        summary:     tools/ocaml: oxenstored: Be more paranoid about ring 
reading
        
        changeset:   23453:130446135528
        user:        Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
        date:        Thu Feb 07 14:26:37 2013 +0000
        summary:     oxenstored: Enforce a maximum message size of 4096 bytes
        
        changeset:   23457:8792a805cc9a
        user:        Ian Campbell <ian.campbell@xxxxxxxxxx>
        date:        Fri Feb 15 11:50:45 2013 +0000
        summary:     tools/ocaml: oxenstored: correctly handle a full ring.

None of which look even vaguely plausible to me. There's some XZ fixes
on the hypervisor side, but this is a guest and GZIP so that seem
unlikely too.

A gzip internal error seems like it should come from zlib and not
something on the Xen side. Was the guest image completely unchanged in
your two tests? Any chance the rebuild picked up a different zlib?

Ian.
 


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