diff options
| author | zhenwei pi <pizhenwei@bytedance.com> | 2024-04-23 05:41:07 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-09-10 08:51:47 +0200 |
| commit | 6cf1c97dad2ebc4de03105cc444b3dfaa83f3dc2 (patch) | |
| tree | 24cfe81075554c0f35ba6741f630248991d1e1f7 /drivers/virtio/virtio_balloon.c | |
| parent | virtio_pmem: Check device status before requesting flush (diff) | |
| download | linux-6cf1c97dad2ebc4de03105cc444b3dfaa83f3dc2.tar.xz linux-6cf1c97dad2ebc4de03105cc444b3dfaa83f3dc2.zip | |
virtio_balloon: introduce oom-kill invocations
When the guest OS runs under critical memory pressure, the guest
starts to kill processes. A guest monitor agent may scan 'oom_kill'
from /proc/vmstat, and reports the OOM KILL event. However, the agent
may be killed and we will loss this critical event(and the later
events).
For now we can also grep for magic words in guest kernel log from host
side. Rather than this unstable way, virtio balloon reports OOM-KILL
invocations instead.
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20240423034109.1552866-3-pizhenwei@bytedance.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_balloon.c')
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 54469277ca30..b54392366142 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -363,6 +363,7 @@ static inline unsigned int update_balloon_vm_stats(struct virtio_balloon *vb) pages_to_bytes(events[PSWPOUT])); update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]); update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]); + update_stat(vb, idx++, VIRTIO_BALLOON_S_OOM_KILL, events[OOM_KILL]); #ifdef CONFIG_HUGETLB_PAGE update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC, |