See upstream commit:
commit 46c4c9d1beb7f5b4cec4dd90e7728720583ee348
Author: Alex Xu (Hello71) <alex_y_xu@xxxxxxxx>
Date: Thu Aug 5 10:40:47 2021 -0400
pipe: increase minimum default pipe size to 2 pages
Signed-off-by: Kienan Stewart <kstewart@xxxxxxxxxxxx>
---
man/man7/pipe.7 | 3 +++
1 file changed, 3 insertions(+)
diff --git a/man/man7/pipe.7 b/man/man7/pipe.7
index d1fad9974..c7f3fbb9e 100644
--- a/man/man7/pipe.7
+++ b/man/man7/pipe.7
@@ -223,6 +223,9 @@ So long as the total number of pages allocated to pipe buffers
for this user is at this limit,
individual pipes created by a user will be limited to one page,
and attempts to increase a pipe's capacity will be denied.
+As of Linux 5.14 the default capacity of individual pipes created
+by a user is two pages instead. Users may reduce the pipe capacity
+below this default value.
.IP
When the value of this limit is zero, no soft limit is applied.
The default value for this file is 16384,
--
2.45.2
