Re: [PATCH -next] cgroup: don't call cgroup1_pidlist_destroy_all() for v2

[xiujianfeng <xiujianfeng@huawei.com>]

Hi,

On 2024/4/18 10:02, Tejun Heo wrote:
> Hello,
> 
> On Wed, Apr 17, 2024 at 02:13:59AM +0000, Xiu Jianfeng wrote:
>> From: Xiu Jianfeng <xiujianfeng@huawei.com>
>>
>> Currently cgroup1_pidlist_destroy_all() will be called when releasing
>> cgroup even if the cgroup is on default hierarchy, however it doesn't
>> make any sense for v2 to destroy pidlist of v1.
>>
>> Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
>> ---
>>  kernel/cgroup/cgroup-v1.c | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
>> index 520a11cb12f4..46d89157d558 100644
>> --- a/kernel/cgroup/cgroup-v1.c
>> +++ b/kernel/cgroup/cgroup-v1.c
>> @@ -197,6 +197,8 @@ void cgroup1_pidlist_destroy_all(struct cgroup *cgrp)
>>  {
>>  	struct cgroup_pidlist *l, *tmp_l;
>>  
>> +	if (cgroup_on_dfl(cgrp))
>> +		return;
> 
> Can you move the test to the caller?

Sure, will do in v2.

> 
> Thanks.
>