Re: [PATCH 4/8] writeback: track if we're sleeping on progress in balance_dirty_pages()

[Jens Axboe]

On 11/02/2016 08:57 AM, Christoph Hellwig wrote:
> On Tue, Nov 01, 2016 at 03:08:47PM -0600, Jens Axboe wrote:
> > Note in the bdi_writeback structure whenever a task ends up sleeping
> > waiting for progress. We can use that information in the lower layers
> > to increase the priority of writes.
>
> Do we need to care about atomicy of multiple threads updating the value
> ?
>
> Otherwise this looks fine.

Don't think we have to care about it too much, it's a soft hint similar
wb->dirty_exceeded.

--
Jens Axboe