Re: [libvirt] [PATCH] cgroup: be robust against cgroup movement races

On Mon, May 20, 2013 at 09:07:17PM -0600, Eric Blake wrote: > https://bugzilla.redhat.com/show_bug.cgi?id=965169 documents a > problem starting domains when cgroups are enabled; I was able > to reliably reproduce the race about 5% of the time when I added > hooks to domain startup by 3 seconds (as that seemed to be about > the length of time that qemu created and then closed a temporary > thread, probably related to aio handling of initially opening > a disk image). >

> * src/util/vircgroup.c (virCgroupAddTaskStrController): Ignore > ESRCH, because a thread ended between read and write attempts. > (virCgroupMoveTask): Loop until all threads have moved. > ACK, this looks like the best we can do here.