On 2/14/25 10:49 AM, David Howells wrote:
> Eric Sandeen <sandeen@xxxxxxxxxx> wrote:
>
>> - if (!pipe_has_watch_queue(pipe)) {
>> - pipe->max_usage = nr_slots;
>> - pipe->nr_accounted = nr_slots;
>> - }
>> + pipe->max_usage = nr_slots;
>> + pipe->nr_accounted = nr_slots;
>
> Hmmm... The pipe ring is supposed to have some spare capacity when used as a
> watch queue so that you can bung at least a few messages into it.
If the pipe has an original number of buffers on it, and
then watch_queue_set_size adjusts that number - where does
the spare capacity come from? Who adds it / where?
Thanks,
-Eric
> David
>
>
