On some of our xen-dom0 machines running 3.14.x we have a problem of
domU's freezing. This has been fixed in:
http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/drivers/net/xen-netback/netback.c?id=59ae9fc67007da8b5aea7b0a31c3607745cfbfee
and the patch has been included in 3.16.x, but I cannot find it in the
current longterm releases. We have an open gentoo bug report about it:
https://bugs.gentoo.org/show_bug.cgi?id=517852
This bug doesn't happen on all xen-dom0 machines, but I can confirm that
on the problematic machine after applying the aforemention patch, the
problem gone away and the system has been running for 60 days without
problems.
Please consider applying the patch to the longterm kernels.
Thank you
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