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SubjectRe: [PATCH] mm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct
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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


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