[OpenAFS] Re: Solaris 10 deadlock issue

Aaron Knister aaronk@umbc.edu
Fri, 17 Jun 2011 13:39:38 -0400


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On Fri, Jun 17, 2011 at 1:28 PM, Andrew Deason <adeason@sinenomine.net>wrote:

> On Fri, 17 Jun 2011 13:21:59 -0400 (EDT)
> Andy Cobaugh <phalenor@gmail.com> wrote:
>
> > Can someone summarise which kernel versions / solaris updates and
> > openafs versions are affected?
>
>
I'm installing a stock u8 machine now to see if I can figure out where the
issue starts.


>  Someone at the conference mentioned some specific patch levels... I
> think they're in Tom Kula's notes. But those were guesses, I believe; we
> haven't gone through all of the patches and seen where it starts
> occurring.
>
> But I haven't even confirmed this on Sol11 / OpenSolaris yet, which I
> want to do.
>
> > Is there any combination of the openafs client and u9 that works right
> > now?
>
> Well, this doesn't make the client completely unusable or anything; make
> a big enough cache and you won't hit it. It just hangs things if you
> mmap a file bigger than the cache and try to read the whole thing (I
> think; the details haven't been fully explored yet).
>
>
To avoid triggering the bug, the cache seems to need to be ~50% of the
physical memory in the box which as Andrew said is only an issue if you want
to copy a file larger than this amount.


> --
> Andrew Deason
> adeason@sinenomine.net
>
> _______________________________________________
> OpenAFS-info mailing list
> OpenAFS-info@openafs.org
> https://lists.openafs.org/mailman/listinfo/openafs-info
>



-- 
Aaron Knister
Systems Administrator
Division of Information Technology
University of Maryland, Baltimore County
aaronk@umbc.edu

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<div class=3D"gmail_quote">On Fri, Jun 17, 2011 at 1:28 PM, Andrew Deason <=
span dir=3D"ltr">&lt;<a href=3D"mailto:adeason@sinenomine.net">adeason@sine=
nomine.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

<div class=3D"im">On Fri, 17 Jun 2011 13:21:59 -0400 (EDT)<br>
Andy Cobaugh &lt;<a href=3D"mailto:phalenor@gmail.com">phalenor@gmail.com</=
a>&gt; wrote:<br>
<br>
&gt; Can someone summarise which kernel versions / solaris updates and<br>
&gt; openafs versions are affected?<br>
<br></div></blockquote><div><br></div><div><meta charset=3D"utf-8">I&#39;m =
installing a stock u8 machine now to see if I can figure out where the issu=
e starts.<br></div><div>=A0</div><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

<div class=3D"im">
</div>Someone at the conference mentioned some specific patch levels... I<b=
r>
think they&#39;re in Tom Kula&#39;s notes. But those were guesses, I believ=
e; we<br>
haven&#39;t gone through all of the patches and seen where it starts<br>
occurring.<br>
<br>
But I haven&#39;t even confirmed this on Sol11 / OpenSolaris yet, which I<b=
r>
want to do.<br>
<div class=3D"im"><br>
&gt; Is there any combination of the openafs client and u9 that works right=
<br>
&gt; now?<br>
<br>
</div>Well, this doesn&#39;t make the client completely unusable or anythin=
g; make<br>
a big enough cache and you won&#39;t hit it. It just hangs things if you<br=
>
mmap a file bigger than the cache and try to read the whole thing (I<br>
think; the details haven&#39;t been fully explored yet).<br>
<font color=3D"#888888"><br></font></blockquote><div><br></div><div>To avoi=
d triggering the bug, the cache seems to need to be ~50% of the physical me=
mory in the box which as Andrew said is only an issue if you want to copy a=
 file larger than this amount.=A0</div>

<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex;"><font color=3D"#888888">
--<br>
</font><div class=3D"im">Andrew Deason<br>
<a href=3D"mailto:adeason@sinenomine.net">adeason@sinenomine.net</a><br>
<br>
</div><div><div></div><div class=3D"h5">___________________________________=
____________<br>
OpenAFS-info mailing list<br>
<a href=3D"mailto:OpenAFS-info@openafs.org">OpenAFS-info@openafs.org</a><br=
>
<a href=3D"https://lists.openafs.org/mailman/listinfo/openafs-info" target=
=3D"_blank">https://lists.openafs.org/mailman/listinfo/openafs-info</a><br>
</div></div></blockquote></div><br><br clear=3D"all"><br>-- <br>Aaron Knist=
er<br>Systems Administrator<br>Division of Information Technology<br>Univer=
sity of Maryland, Baltimore County<br><a href=3D"mailto:aaronk@umbc.edu" ta=
rget=3D"_blank">aaronk@umbc.edu</a><br>



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