Re: [PATCH v3 3/5] psi: introduce state_mask to represent stalled psi states

[Johannes Weiner]

On Thu, Jan 24, 2019 at 01:15:16PM -0800, Suren Baghdasaryan wrote:
> The psi monitoring patches will need to determine the same states as
> record_times(). To avoid calculating them twice, maintain a state mask
> that can be consulted cheaply. Do this in a separate patch to keep the
> churn in the main feature patch at a minimum.
> This adds 4-byte state_mask member into psi_group_cpu struct which
> results in its first cacheline-aligned part to become 52 bytes long.
> Add explicit values to enumeration element counters that affect
> psi_group_cpu struct size.
> 
> Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>