sched/psi: Allow unprivileged polling of N*2s period

[linux-2.6-block.git] / Documentation / accounting / psi.rst

diff --git a/Documentation/accounting/psi.rst b/Documentation/accounting/psi.rst
index 5e40b3f437f90c2d202198aa6bfac5707fa7ac63..df6062eb3abbccccc6ed98ab544905babddedb78 100644 (file)
--- a/Documentation/accounting/psi.rst
+++ b/Documentation/accounting/psi.rst
@@ -105,6 +105,10 @@ prevent overly frequent polling. Max limit is chosen as a high enough number
 after which monitors are most likely not needed and psi averages can be used
 instead.
 
+Unprivileged users can also create monitors, with the only limitation that the
+window size must be a multiple of 2s, in order to prevent excessive resource
+usage.
+
 When activated, psi monitor stays active for at least the duration of one
 tracking window to avoid repeated activations/deactivations when system is
 bouncing in and out of the stall state.