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SubjectRe: [RFC PATCH v2 2/2] locking/percpu-rwsem: Mark rwsem as non-spinnable in percpu_rwsem_release()
On Tue, May 15, 2018 at 8:42 AM, Amir Goldstein <> wrote:
> On Mon, May 14, 2018 at 10:31 PM, Waiman Long <> wrote:
>> The percpu_rwsem_release() is called when the ownership of the embedded
>> rwsem is to be transferred to another task. The new owner, however, may
>> take a while to get the ownership of the lock via percpu_rwsem_acquire().
>> During that period, the rwsem is now marked as writer-owned with no
>> optimistic spinning.
> Waiman,
> Thanks for the fix. I will test it soon.
> For this commit message I suggest that you add parts of the reproducer
> found here:

fsfreeze is happy with these changes.

You may add:
Tested-by: Amir Goldstein <>


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