On 12/15/2014 12:58 AM, Martin Kletzander wrote:
> Instead of setting the value of cpuset.mems once when the domain starts
> and then re-calculating the value every time we need to change the child
> cgroup values, leave the cgroup alone and rather set the child data
> every time there is new cgroup created. We don't leave any task in the
> parent group anyway. This will ease both current and future code.
>
> Signed-off-by: Martin Kletzander <mkletzan@xxxxxxxxxx>
> ---
> src/qemu/qemu_cgroup.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++--
> src/qemu/qemu_driver.c | 59 +++++++++++++++-----------------------------
> 2 files changed, 85 insertions(+), 41 deletions(-)
This patch causes libvirtd to segfault on startup:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffda116700 (LWP 15311)]
0x00007ffff7400890 in virCgroupPathOfController (group=0x0, controller=2,
key=0x7ffff768a019 "tasks", path=0x7fffda115b30) at
util/vircgroup.c:1867
1867 if (group->controllers[controller].mountPoint == NULL) {
(gdb) bt
#0 0x00007ffff7400890 in virCgroupPathOfController (group=0x0,
controller=2,
key=0x7ffff768a019 "tasks", path=0x7fffda115b30) at
util/vircgroup.c:1867
#1 0x00007ffff73fe4db in virCgroupGetValueStr (group=0x0, controller=2,
key=0x7ffff768a019 "tasks", value=0x7fffda115b80) at
util/vircgroup.c:751
#2 0x00007ffff7405673 in virCgroupHasEmptyTasks (cgroup=0x0, controller=2)
at util/vircgroup.c:3935
#3 0x00007fffdc79c687 in qemuRestoreCgroupState (vm=0x7fffd41dd8d0)
at qemu/qemu_cgroup.c:802
#4 0x00007fffdc79c80c in qemuConnectCgroup (driver=0x7fffd4152ae0,
vm=0x7fffd41dd8d0) at qemu/qemu_cgroup.c:848
#5 0x00007fffdc7b8553 in qemuProcessReconnect (opaque=0x7fffd41da150)
at qemu/qemu_process.c:3616
#6 0x00007ffff7469830 in virThreadHelper (data=0x7fffd41c5b00)
at util/virthread.c:197
#7 0x00007ffff3e65ee5 in start_thread (arg=0x7fffda116700)
at pthread_create.c:309
#8 0x00007ffff3b94b8d in clone ()
at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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