Since following path was merged in 5.4-rc3, auto-tuning feature in threads-max was not exist any more. Fix the admin-guide document as is.

kernel/sysctl.c: do not override max_threads provided by userspace b0f53dbc4bc4c371f38b14c391095a3bb8a0bb40

Signed-off-by: Masanari Iida standby24x7@gmail.com --- Documentation/admin-guide/sysctl/kernel.rst | 4 ---- 1 file changed, 4 deletions(-)

diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 38e0f10d7d9f..9035adbdff58 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -1109,10 +1109,6 @@ constant FUTEX_TID_MASK (0x3fffffff). If a value outside of this range is written to threads-max an error EINVAL occurs.

-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. -

unknown_nmi_panic: ==================

On Fri 01-11-19 13:04:37, Masanari Iida wrote:

Since following patch was merged 5.4-rc3, minimum value for threads-max changed to 1.

kernel/sysctl.c: do not override max_threads provided by userspace b0f53dbc4bc4c371f38b14c391095a3bb8a0bb40

Signed-off-by: Masanari Iida standby24x7@gmail.com

Acked-by: Michal Hocko mhocko@suse.com

---

Documentation/admin-guide/sysctl/kernel.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 032c7cd3cede..38e0f10d7d9f 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -1101,7 +1101,7 @@ 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 minimum value that can be written to threads-max is 1. The maximum value that can be written to threads-max is given by the constant FUTEX_TID_MASK (0x3fffffff). -- 2.24.0.rc1