Hello, I hit this issue on recent upstream, looks there is a leak blkio in cgroup, please help check it and let me know if you need any info/testing for it, thanks. repo:https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git branch:master commit HEAD: 3c999d1ae3c75991902a1a7dad0cb62c2a3008b4 reproducer: 1. install podman and container-tools 2. # for i in $(seq 1000); do podman run --name=test --replace centos /bin/echo 'running'; done >/dev/null 3. # while [ 1 ];do cat /proc/cgroups | grep -e subsys -e blkio | column -t; sleep 5; done results: #subsys_name hierarchy num_cgroups enabled blkio 0 85 1 #subsys_name hierarchy num_cgroups enabled blkio 0 138 1 #subsys_name hierarchy num_cgroups enabled blkio 0 210 1 #subsys_name hierarchy num_cgroups enabled blkio 0 283 1 #subsys_name hierarchy num_cgroups enabled blkio 0 357 1 #subsys_name hierarchy num_cgroups enabled blkio 0 430 1 #subsys_name hierarchy num_cgroups enabled blkio 0 505 1 #subsys_name hierarchy num_cgroups enabled blkio 0 578 1 #subsys_name hierarchy num_cgroups enabled blkio 0 653 1 #subsys_name hierarchy num_cgroups enabled blkio 0 726 1 -- Best Regards, Changhui