Hi,
I asked about a backport to 4.3, but this won't happen according to
support. You should be aware that there are more issues with hugepages
and 4.3:
https://access.redhat.com/solutions/4904441
https://bugzilla.redhat.com/show_bug.cgi?id=1804037
https://bugzilla.redhat.com/show_bug.cgi?id=1804046
https://bugzilla.redhat.com/show_bug.cgi?id=1812316
https://bugzilla.redhat.com/show_bug.cgi?id=1806339
https://bugzilla.redhat.com/show_bug.cgi?id=1785507
Greetings
Klaas
On 15.04.20 13:42, Alan G wrote:
Will this be fixed in 4.3 or only 4.4?
Thanks,
Alan
---- On Wed, 15 Apr 2020 12:37:38 +0100 *Lucia Jelinkova
<ljeli...@redhat.com>* wrote ----
Hi,
I think you've hit similar issue as reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=1812316
You're right, the hugepages are considered as allocated memory and
it is a bug. I am working on a fix right now.
Regards,
Lucia
On Wed, Apr 15, 2020 at 1:21 PM Alan G <alan+ov...@griff.me.uk
<mailto:alan%2bov...@griff.me.uk>> wrote:
Hi,
I seem to have found an issue when trying to setup a high
performance VM utilising hugepages and NUMA pinning.
The VM is configured for 32GB RAM and uses hugepages of size 1G.
The host has two NUMA nodes each having 64GB RAM (for 128GB
total system RAM).
No other VMs are running or otherwise pinned to the host.
The VM is pinned to node 0. And the required hugepages are
allocated with
echo 32 >
/sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages
I then attempt to start the VM and get a pop-up error saying
"cannot accommodate memory of VM's pinned virtual NUMA nodes
within host's physical NUMA nodes".
However, if I remove the hugepages from node 0
echo 0 >
/sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages
Start the VM and then immediately re-create the hugepqages
then everything works as expected.
It seems to me that oVirt is considering the hugepages as
allocated memory even if they are not in use.
Is this correct?
Thanks,
Alan
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