Re: [PATCH 1/6] buffer: cleanup free_more_memory() flusher wakeup

From: Jens Axboe
Date: Wed Sep 20 2017 - 11:18:59 EST

On 09/20/2017 08:17 AM, Jan Kara wrote:
> On Tue 19-09-17 13:53:02, Jens Axboe wrote:
>> This whole function is... interesting. Change the wakeup call
>> to the flusher threads to pass in nr_pages == 0, instead of
>> some random number of pages. This matches more closely what
>> similar cases do for memory shortage/reclaim.
>> Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
> Ok, probably makes sense. You can add:
> Reviewed-by: Jan Kara <jack@xxxxxxx>
> BTW, after this nobody seems to use the number of pages for
> wakeup_flusher_threads() so can you just delete the argument for the
> function? After all system-wide wakeup is useful only for system wide
> sync(2) or memory reclaim so number of pages isn't very useful...

Great observation! That's true, and if we kill that, it enables
further cleanups down the line for patch 5 and 6. I have
incorporated that.

Jens Axboe