On 3/23/18 9:30 PM, Matthew Wilcox wrote:
So, introduce a new rwlock in mm_struct to protect the concurrent access to arg_start|end and env_start|end.I don't think an rwlock makes much sense here. There is almost no concurrency on the read side, and an rwlock is more expensive than a spinlock. Just use a spinlock.
Thanks for the comment. Yes, actually there is not concurrency on the read side, will change to regular spin lock.
Yang
