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Description
Will get error, while setting the hard_limit as "0" and swap_hard_limit as "-1" first time
Version:
libvirt-1.2.8-3.el7.x86_64
qemu-kvm-rhev-2.1.0-4.el7.x86_64
kernel-3.10.0-168.el7.x86_64
How reproducible:
100%
Steps to Reproduce:
1. restart the libvirtd service, and prepare one shutoff guest, which the 3 memtune setting value is unlimited.
# systemctl restart libvirtd
# virsh memtune rhel7
hard_limit : unlimited
soft_limit : unlimited
swap_hard_limit: unlimited
2. setting the hard_limit as "0" and swap_hard_limit as "-1", get error
# virsh memtune rhel7 --hard-limit 0 --swap-hard-limit -1
error: Unable to change memory parameters
error: invalid argument: memory hard_limit tunable value must be lower than or equal to swap_hard_limit
3. setting hard_limit and swap_hard_limit as "-1", no error
# virsh memtune rhel7 --hard-limit -1 --swap-hard-limit -1
4. setting the hard_limit as "0" and swap_hard_limit as "-1" again, no error
# virsh memtune rhel7 --hard-limit 0 --swap-hard-limit -1
Actual results：
As step 2, while setting the hard_limit as "0" and swap_hard_limit as "-1" first time, will get error.
Expected results:
Since 0 and -1 should be all denotes unlimited, so the step 2 should not meet any error.
Additional info:
It could not be that obvious but it's a duplicate of BZ 1146539. The main issue with memtune is that we handle 0 value differently in virsh and our APIs and also we have two possible ways how to internally store unlimited. The patch is on it's way to upstream.
*** This bug has been marked as a duplicate of bug 1146539 ***