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qemu: Ignore missing vm.unprivileged_userfaultfd sysctl

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Older kernels did not support this sysctl, but they did not restrict
userfaultfd in any way so everything worked as if
vm.unprivileged_userfaultfd was set to 1. Thus we can safely ignore
errors when setting the value.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Jiri Denemark 2022-02-09 11:08:42 +01:00
parent da393034c9
commit 558f00397a
1 changed files with 1 additions and 1 deletions
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2
src/qemu/postcopy-migration.sysctl
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@ -3,4 +3,4 @@
# privileged processes.
# It can be safely overridden by a file in /etc/sysctl.d/ in case post-copy
# migration is not used on the host.
vm.unprivileged_userfaultfd = 1
-vm.unprivileged_userfaultfd = 1