Logic has been changed in kernel 3.4 by commit e9aba5158a
("tty: rework pty count limiting") but still not documented.
Sysctl kernel.pty.max works as global limit, kernel.pty.reserve ptys
are reserved for initial devpts instance (mounted without "newinstance").
Per-instance limit also could be set by mount option "max=%d".
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Konstantin Khlebnikovauthored and Greg Kroah-Hartmancommited 2016-03-07 16:11:14 -08:00
Changelog [v2]:
- Add note indicating strict isolation is not possible unless all
mounts of devpts use the 'newinstance' mount option.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Sukadev Bhattiproluauthored and Linus Torvaldscommited 2009-01-02 10:19:36 -08:00
Konstantin Khlebnikov
authored and
Greg Kroah-Hartman
commited 
Sukadev Bhattiprolu
authored and
Linus Torvalds
commited