hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9PR8C CVE: NA -------------------------------- In the cgroup v2 cpu subsystem, assuming we have a cgroup named test, we set cpu.max and cpu.max.burst: # echo 1000000 > /sys/fs/cgroup/test/cpu.max # echo 1000000 > /sys/fs/cgroup/test/cpu.max.burst Next we remove the restriction on cfs bandwidth: # echo max > /sys/fs/cgroup/test/cpu.max # cat /sys/fs/cgroup/test/cpu.max max 100000 # cat /sys/fs/cgroup/test/cpu.max.burst 1000000 Now we expect that the value of burst should be 0. When the burst is 0, it means that the restriction on burst is cancelled. Fixes: f4183717b370 ("sched/fair: Introduce the burstable CFS controller") Signed-off-by: Cheng Yu <serein.chengyu@huawei.com> --- kernel/sched/core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 5441afe18953..f5b929ef9652 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -12060,8 +12060,11 @@ static ssize_t cpu_max_write(struct kernfs_open_file *of, int ret; ret = cpu_period_quota_parse(buf, &period, "a); - if (!ret) + if (!ret) { + if (quota == RUNTIME_INF) + burst = 0; ret = tg_set_cfs_bandwidth(tg, period, quota, burst); + } return ret ?: nbytes; } #endif -- 2.25.1