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Bug#440676: nfs-kernel-server: Simultaneous transfer on mirrored nfs mounts causes service freezes



On Fri, Sep 07, 2007 at 03:23:05PM +0200, Moritz Mühlenhoff wrote:
> Jeffrey B. Green:
> > > A very similar behaviour can be reproduced with i386 as well (with the
> > > Etch versions of  the Linux kernel and nfs-kernel-server):

This patch fixed also a NFS freeze for me in my XEN domU. I just build
a software project both in dom0 and domU in parallel (but in different
build directories) and it freezes during the first 5 minutes. (Hardware:
a quad core intel CPU, dom0 OpenSuse 10.2, domU Debian etch).

It's now also much faster (by a factor 5--10 for a configure script). It
still not as fast as expected so you may extent the patch :-)

> Could you please test the attached patch from RHEL5 and report if it resolves
> the problem for you?

It does at least for me, so please apply the patch.

> Instructions on how to compile a modified kernel can be found at
> http://wiki.debian.org/DebianKernelCustomCompilation

I just copied the patch into patches/ of Xen 3.1 source and added it to
patches/series and did a normal build of Xen. Fairly simple (at least if
one does not forget to updates the modules in the domU)!

Thanks!

PS: Where does the patch come from? Are there more?

Jens




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