Juergen Gross writes ("[PATCH v2 3/3] tools/libxc: retry hypercall in case of
EFAULT"):
> A hypercall issued via the privcmd driver can very rarely return
> -EFAULT even if the hypercall buffers are locked in memory. This
> happens for hypercall buffers in user memory when the Linux kernel
> is do
A hypercall issued via the privcmd driver can very rarely return
-EFAULT even if the hypercall buffers are locked in memory. This
happens for hypercall buffers in user memory when the Linux kernel
is doing memory scans e.g. for page migration or compaction.
Retry the getpageframeinfo3 hypercall up
