BACKPORT: fs: kernfs: add poll file operation

[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / Documentation / cgroup-v2.txt

diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt
index dc44785dc0fa146a2de30aa11ef2c410f1b00622..7e367281251020f9877f456b6fc7e81df7a18622 100644 (file)
--- a/Documentation/cgroup-v2.txt
+++ b/Documentation/cgroup-v2.txt
@@ -958,6 +958,12 @@ All time durations are in microseconds.
        $PERIOD duration.  If only one number is written, $MAX is
        updated.
 
+  cpu.pressure
+       A read-only nested-key file which exists on non-root cgroups.
+
+       Shows pressure stall information for CPU. See
+       Documentation/accounting/psi.txt for details.
+
 
 Memory
 ------
@@ -1194,6 +1200,12 @@ PAGE_SIZE multiple when read back.
        Swap usage hard limit.  If a cgroup's swap usage reaches this
        limit, anonymous meomry of the cgroup will not be swapped out.
 
+  memory.pressure
+       A read-only nested-key file which exists on non-root cgroups.
+
+       Shows pressure stall information for memory. See
+       Documentation/accounting/psi.txt for details.
+
 
 Usage Guidelines
 ~~~~~~~~~~~~~~~~
@@ -1329,6 +1341,12 @@ IO Interface Files
 
          8:16 rbps=2097152 wbps=max riops=max wiops=max
 
+  io.pressure
+       A read-only nested-key file which exists on non-root cgroups.
+
+       Shows pressure stall information for IO. See
+       Documentation/accounting/psi.txt for details.
+
 
 Writeback
 ~~~~~~~~~