Re: [libvirt PATCH v3] qemu: Enable unprivileged userfaultfd for post-copy migration
On Tue, Dec 07, 2021 at 03:00:31PM +0100, Jiri Denemark wrote:
Userfaultfd is by default allowed only for privileged processes.
Since
libvirt runs QEMU unprivileged, we need to enable unprivileged access to
userfaultfd to enable post-copy migration.
https://bugzilla.redhat.com/show_bug.cgi?id=1945420
Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange(a)redhat.com>
Notes:
If you wonder about the 60-* prefix of the installed sysctl file, we already
install 60-libvirtd.conf so I think it makes sense to use the same prefix for
all sysctl configuration installed by libvirt.
Yep, 50-* is often used by common distro defaults, so 60 makes
sense and leaves space for users to override.
Regards,
Daniel
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