On 8/25/20 12:53 AM, Zhang, Qiang wrote:
________________________________________
发件人: [email protected] <[email protected]> 代表
[email protected] <[email protected]>
发送时间: 2020年8月20日 11:24
收件人: [email protected]; [email protected]; [email protected]
抄送: [email protected]
主题: [PATCH] debugobjects: install cpu hotplug callback
From: Zqiang <[email protected]>
When a cpu going offline, we should free objects in "percpu_obj_pool"
free_objs list which corresponding to this cpu.
The percpu free object pool is supposed to be accessed only by that
particular cpu without any lock. Trying to access it from another cpu
can cause a race condition unless one can make sure that the offline cpu
won't become online in the mean time. There shouldn't be too many free
objects in the percpu pool. Is it worth the effort to free them?
Cheers,
Longman
