[PATCH] docs: cgroup-v2: mark memory.pressure and io.pressure as read-write

[PATCH] docs: cgroup-v2: mark memory.pressure and io.pressure as read-write

[Tao Cui]

From: Tao Cui <cuitao@kylinos.cn>

The cgroup-v2 documentation describes memory.pressure and io.pressure as
"read-only nested-keyed file", but both files accept trigger writes
(cgroup_memory_pressure_write / cgroup_io_pressure_write) and are therefore
read-write. cpu.pressure and irq.pressure are already documented as
read-write, so this also resolves an internal inconsistency.

Signed-off-by: Tao Cui <cuitao@kylinos.cn>
---
 Documentation/admin-guide/cgroup-v2.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index f3a3e26854c2..c08ae18afea8 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1930,7 +1930,7 @@ The following nested keys are defined.
 	is allowed unless memory.swap.max is set to 0.
 
   memory.pressure
-	A read-only nested-keyed file.
+	A read-write nested-keyed file.
 
 	Shows pressure stall information for memory. See
 	:ref:`Documentation/accounting/psi.rst <psi>` for details.
@@ -2190,7 +2190,7 @@ IO Interface Files
 	  8:16 rbps=2097152 wbps=max riops=max wiops=max
 
   io.pressure
-	A read-only nested-keyed file.
+	A read-write nested-keyed file.
 
 	Shows pressure stall information for IO. See
 	:ref:`Documentation/accounting/psi.rst <psi>` for details.
-- 
2.43.0

Re: [PATCH] docs: cgroup-v2: mark memory.pressure and io.pressure as read-write

[Michal Koutný]

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On Fri, Jul 24, 2026 at 10:05:08AM +0800, Tao Cui <cui.tao@linux.dev> wrote:
> From: Tao Cui <cuitao@kylinos.cn>
> 
> The cgroup-v2 documentation describes memory.pressure and io.pressure as
> "read-only nested-keyed file", but both files accept trigger writes
> (cgroup_memory_pressure_write / cgroup_io_pressure_write) and are therefore
> read-write. cpu.pressure and irq.pressure are already documented as
> read-write, so this also resolves an internal inconsistency.
> 
> Signed-off-by: Tao Cui <cuitao@kylinos.cn>
> ---
>  Documentation/admin-guide/cgroup-v2.rst | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Michal Koutný <mkoutny@suse.com>

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