Currently iowait doesn't distinguish background/foreground tasks and we
have seen cases where a device run to high frequency unnecessarily when
running some background I/O. This patch limits iowait boost to tasks with
prefer_idle only. Specifically, on Pixel, those are foreground and top
app tasks.
Bug: 130308826
Test: Boot and trace
Change-Id: I2d892beeb4b12b7e8f0fb2848c23982148648a10
Signed-off-by: Wei Wang <wvw@google.com>
Signed-off-by: Lau <laststandrighthere@gmail.com>
6400cd3b94