brain-hackers_pepepper-mirror
/
linux-brain
mirror of https://github.com/brain-hackers/linux-brain.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

cpuidle: use first valid target residency as poll time 

commit 36fcb4292473cb9c9ce7706d038bcf0eda5cabeb upstream.

Commit 259231a045 ("cpuidle: add poll_limit_ns to cpuidle_device
structure") changed, by mistake, the target residency from the first
available sleep state to the last available sleep state (which should
be longer).

This might cause excessive polling.

Fixes: 259231a045 ("cpuidle: add poll_limit_ns to cpuidle_device structure")
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marcelo Tosatti 2019-12-06 13:07:41 -02:00 committed by Greg Kroah-Hartman
parent 18feee7b1c
commit a101ec74bb
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/cpuidle/cpuidle.c
View File

@ -384,6 +384,7 @@ u64 cpuidle_poll_time(struct cpuidle_driver *drv,
continue;
limit_ns = (u64)drv->states[i].target_residency * NSEC_PER_USEC;
break;
}
dev->poll_limit_ns = limit_ns;