Xen devel - May 2005 - RE: copying large files over NFS locks up machine on-testing from Thursday

> I just updated to 2.0.6. Large NFS transfers work fine with 
> the default configuration. If xend has been started (i.e. the 
> bridge has been configured) the machine will become 
> unresponsive when copying a large file over NFS.
It would be good to see if you can reproduce this on native with a
bridge running.

Thanks,
Ian
> On 5/21/05, Kip Macy <kip.macy@gmail.com> wrote:
> >  > It sounds like the megaraid driver is unhappy. Can you reproduce
> > this
> > > copying the file to /dev/null?
> > 
> > I think it was unhappy because its interrupts weren''t being 
> serviced.
> > Copying /home/kmacy/suseroot.0 to /home/kmacy/suseroot.1 
> (NFS -> NFS) 
> > locks the machine up just fine. The machine will also become 
> > unresponsive transiently when running fsck in domU on a filesystem 
> > that is a loopback device mounted over NFS.
> > 
> > > It''s worth checking the Dell site to make sure you have 
> the latest 
> > > megaraid firmware and driver.
> > 
> > Running native mainline 2.6.11.10 NFS transfers don''t cause
any
> > problems. To reduce the possibility of it being a 
> benchmark-like SUE 
> > I''ll do a clean build from scratch of the dom0 kernel.
> > 
> > 
> >         -Kip
> >
> 
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It turns out it isn''t bridging - the NFS lockup only happens if xend
is running. If I start then stop xend and do a NFS transfer I don''t
hit any problems. Any idea what xend could be doing that would be
making the system so unhappy?



  -Kip

> It would be good to see if you can reproduce this on native with a
> bridge running.
> 
> Thanks,
> Ian
> 
> > On 5/21/05, Kip Macy <kip.macy@gmail.com> wrote:
> > >  > It sounds like the megaraid driver is unhappy. Can you
reproduce
> > > this
> > > > copying the file to /dev/null?
> > > 
> > > I think it was unhappy because its interrupts weren''t
being
> > serviced.
> > > Copying /home/kmacy/suseroot.0 to /home/kmacy/suseroot.1 
> > (NFS -> NFS) 
> > > locks the machine up just fine. The machine will also become 
> > > unresponsive transiently when running fsck in domU on a
filesystem
> > > that is a loopback device mounted over NFS.
> > > 
> > > > It''s worth checking the Dell site to make sure you
have
> > the latest 
> > > > megaraid firmware and driver.
> > > 
> > > Running native mainline 2.6.11.10 NFS transfers don''t
cause any
> > > problems. To reduce the possibility of it being a 
> > benchmark-like SUE 
> > > I''ll do a clean build from scratch of the dom0 kernel.
> > > 
> > > 
> > >         -Kip
> > >
> > 
>
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