On Tue, Jul 23, 2019 at 07:56:56PM +0000, Jim Fehlig wrote: > Some VM configurations may result in a large number of threads created by > the associated qemu process which can exceed the system default limit. The > maximum number of threads allowed per process is controlled by the pids > cgroup controller and is set to 16k when creating VMs with systemd's > machined service. The maximum number of threads per process is recorded > in the pids.max file under the machine's pids controller cgroup hierarchy, > e.g. > > $cgrp-mnt/pids/machine.slice/machine-qemu\\x2d1\\x2dtest.scope/pids.max > > Maximum threads per process is controlled with the TasksMax property of > the systemd scope for the machine. This patch adds an option to qemu.conf > which can be used to override the maximum number of threads allowed per > qemu process. If the value of option is greater than zero, it will be set > in the TasksMax property of the machine's scope after creating the machine. > > Signed-off-by: Jim Fehlig <jfehlig@xxxxxxxx> > --- > > Rebase and resend of > > https://www.redhat.com/archives/libvir-list/2019-June/msg00185.html > > src/lxc/lxc_cgroup.c | 1 + > src/qemu/libvirtd_qemu.aug | 1 + > src/qemu/qemu.conf | 10 ++++++++++ > src/qemu/qemu_cgroup.c | 1 + > src/qemu/qemu_conf.c | 2 ++ > src/qemu/qemu_conf.h | 1 + > src/qemu/test_libvirtd_qemu.aug.in | 1 + > src/util/vircgroup.c | 6 +++++- > src/util/vircgroup.h | 1 + > src/util/virsystemd.c | 24 +++++++++++++++++++++++- > src/util/virsystemd.h | 3 ++- > tests/virsystemdtest.c | 12 ++++++------ > 12 files changed, 54 insertions(+), 9 deletions(-) Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx> Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
