89 lines
3.2 KiB
Diff
89 lines
3.2 KiB
Diff
From 9cf56b5a0d1394fef10afdd763dc8005457bbaf5 Mon Sep 17 00:00:00 2001
|
|
Message-Id: <9cf56b5a0d1394fef10afdd763dc8005457bbaf5@dist-git>
|
|
From: Pavel Hrdina <phrdina@redhat.com>
|
|
Date: Fri, 19 Feb 2021 13:33:51 +0100
|
|
Subject: [PATCH] vircgroupv2: properly detect placement of running VM
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
When libvirtd starts a VM it internally stores a path to the main
|
|
cgroup. When we restart libvirtd we should get to the same state.
|
|
|
|
When we start a VM on host with systemd the cgroup is created for us and
|
|
the process is already placed into that cgroup and we detect the path
|
|
created by systemd using /proc/$PID/cgroup. After that we create
|
|
sub-cgroups and move all threads there.
|
|
|
|
Once libvirtd is restarted we again detect the cgroup path using
|
|
/proc/$PID/cgroup, but in this case we will get a different path because
|
|
the main thread was moved to a "emulator" cgroup.
|
|
|
|
Instead of ignoring the "emulator" directory when validating cgroups
|
|
remove it completely when detecting cgroup otherwise cgroups will not
|
|
work properly when libvirtd is restarted.
|
|
|
|
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
|
|
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
|
|
(cherry picked from commit 902c6644a8ec292789d561b3188e576c37a86872)
|
|
|
|
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1798463
|
|
|
|
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
|
|
Message-Id: <10fb6b61cbb4f9caf8e8ba7706ec01d1da41fc67.1613737828.git.phrdina@redhat.com>
|
|
Reviewed-by: Ján Tomko <jtomko@redhat.com>
|
|
---
|
|
src/util/vircgroupv2.c | 17 ++++++++++-------
|
|
1 file changed, 10 insertions(+), 7 deletions(-)
|
|
|
|
diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
|
|
index 92ae3ec839..4682a6a920 100644
|
|
--- a/src/util/vircgroupv2.c
|
|
+++ b/src/util/vircgroupv2.c
|
|
@@ -121,12 +121,6 @@ virCgroupV2ValidateMachineGroup(virCgroupPtr group,
|
|
if (!(tmp = strrchr(group->unified.placement, '/')))
|
|
return false;
|
|
|
|
- if (STREQ(tmp, "/emulator")) {
|
|
- *tmp = '\0';
|
|
-
|
|
- if (!(tmp = strrchr(group->unified.placement, '/')))
|
|
- return false;
|
|
- }
|
|
tmp++;
|
|
|
|
if (STRNEQ(tmp, partmachinename) &&
|
|
@@ -197,6 +191,9 @@ virCgroupV2DetectPlacement(virCgroupPtr group,
|
|
const char *controllers,
|
|
const char *selfpath)
|
|
{
|
|
+ g_autofree char *placement = g_strdup(selfpath);
|
|
+ char *tmp = NULL;
|
|
+
|
|
if (group->unified.placement)
|
|
return 0;
|
|
|
|
@@ -207,12 +204,18 @@ virCgroupV2DetectPlacement(virCgroupPtr group,
|
|
if (STRNEQ(controllers, ""))
|
|
return 0;
|
|
|
|
+ /* Running VM will have the main thread placed in emulator cgroup
|
|
+ * but we need to get the main cgroup. */
|
|
+ tmp = g_strrstr(placement, "/emulator");
|
|
+ if (tmp)
|
|
+ *tmp = '\0';
|
|
+
|
|
/*
|
|
* selfpath == "/" + path="" -> "/"
|
|
* selfpath == "/libvirt.service" + path == "" -> "/libvirt.service"
|
|
* selfpath == "/libvirt.service" + path == "foo" -> "/libvirt.service/foo"
|
|
*/
|
|
- group->unified.placement = g_strdup_printf("%s%s%s", selfpath,
|
|
+ group->unified.placement = g_strdup_printf("%s%s%s", placement,
|
|
(STREQ(selfpath, "/") || STREQ(path, "") ? "" : "/"), path);
|
|
|
|
return 0;
|
|
--
|
|
2.30.0
|
|
|