File /proc/sys/kernel/threads-max controls the maximum number
of threads that can be created using fork().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@xxxxxx>
Documentation/sysctl/kernel.txt | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 75511ef..40f9c90 100644
@@ -846,6 +846,27 @@ can be ORed together:
+This value controls the maximum number of threads that can be created
+During initialization the kernel sets this value such that even if the
+maximum number of threads is created, the thread structures occupy only
+a part (1/8th) of the available RAM pages.
+The minimum value that can be written to threads-max is 20.
+The maximum vlaue that can be written to threads-max is given by the
+constant FUTEX_TID_MASK (0x3fffffff).
+If a value outside of this range is written to threads-max an error
+The value written is checked against the available RAM pages. If the
+thread structures would occupy too much (more than 1/8th) of the
+available RAM pages threads-max is reduced accordingly.
The value in this file affects behavior of handling NMI. When the