This documents the random directory, based on the behaviour seen in
drivers/char/random.c.
Signed-off-by: Stephen Kitt <[email protected]>
---
Documentation/admin-guide/sysctl/kernel.rst | 32 +++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 6d96f17b74a4..5f432f51f23e 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -996,6 +996,38 @@ pty
See Documentation/filesystems/devpts.rst.
+random
+======
+
+This is a directory, with the following entries:
+
+* ``boot_id``: a UUID generated the first time this is retrieved, and
+ unvarying after that;
+
+* ``entropy_avail``: the pool's entropy count, in bits;
+
+* ``poolsize``: the entropy pool size, in bits;
+
+* ``urandom_min_reseed_secs``: obsolete (used to determine the minimum
+ number of seconds between urandom pool reseeding).
+
+* ``uuid``: a UUID generated every time this is retrieved (this can
+ thus be used to generate UUIDs at will);
+
+* ``write_wakeup_threshold``: when the entropy count drops below this
+ (as a number of bits), processes waiting to write to ``/dev/random``
+ are woken up.
+
+If ``drivers/char/random.c`` is built with ``ADD_INTERRUPT_BENCH``
+defined, these additional entries are present:
+
+* ``add_interrupt_avg_cycles``: the average number of cycles between
+ interrupts used to feed the pool;
+
+* ``add_interrupt_avg_deviation``: the standard deviation seen on the
+ number of cycles between interrupts used to feed the pool.
+
+
randomize_va_space
==================
base-commit: 46e906144c3f4b0a7b6dcc7713fafad65b1859e0
--
2.20.1
On Tue, 23 Jun 2020 13:25:14 +0200
Stephen Kitt <[email protected]> wrote:
> This documents the random directory, based on the behaviour seen in
> drivers/char/random.c.
>
> Signed-off-by: Stephen Kitt <[email protected]>
> ---
> Documentation/admin-guide/sysctl/kernel.rst | 32 +++++++++++++++++++++
> 1 file changed, 32 insertions(+)
Applied, thanks.
jon