From 83adba541a90d7b17da9c65a9584e3157ce2c76b Mon Sep 17 00:00:00 2001 From: Michal Privoznik Date: Wed, 7 Jun 2023 08:40:15 +0200 Subject: [PATCH] qemu: Allow more generous cpuset.mems for vCPUs and IOThreads The unit that cpuset CGroups controller works with is a thread/process, not individual memory allocations. Therefore, after we've set cpuset.mems for emulator (after previous commit it's set to union of all host NUMA nodes allowed for given domain), and as we try to set up cpuset.mems for vCPUs/IOThreads, memory is migrated to selected NUMA node(s). We are effectively saying: "this thread (vCPU thread) can have memory only from these NUMA node(s)". That's not really what we want though. The cpuset controller doesn't differentiate memory "belonging" to the emulator thread and vCPU thread or IOThread even. Therefore, set union of all allowed host NUMA nodes, just like we're doing for the emulator thread. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2138150 Signed-off-by: Michal Privoznik Reviewed-by: Martin Kletzander --- src/qemu/qemu_process.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 1d3cdeff9a..d9269e37a1 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -2598,7 +2598,6 @@ qemuProcessSetupPid(virDomainObj *vm, /* QEMU allocates its memory from the emulator thread. Thus it * needs to access union of all host nodes configured. */ if (unionMems && - nameval == VIR_CGROUP_THREAD_EMULATOR && mem_mode != VIR_DOMAIN_NUMATUNE_MEM_RESTRICTIVE) { qemuDomainNumatuneMaybeFormatNodesetUnion(vm, NULL, &mem_mask); } else { @@ -5911,7 +5910,7 @@ qemuProcessSetupVcpu(virDomainObj *vm, vm->def->cputune.period, vm->def->cputune.quota, &vcpu->sched, - false) < 0) + true) < 0) return -1; if (schedCore && @@ -6067,7 +6066,7 @@ qemuProcessSetupIOThread(virDomainObj *vm, vm->def->cputune.iothread_period, vm->def->cputune.iothread_quota, &iothread->sched, - false); + true); } -- 2.47.2