tree 1b4ec23c3e2e71813a333d940e02fecc32c13c80
parent 465893e18878e119d8d0255439fad8debbd646fd
author Konstantin Khlebnikov <khlebnikov@yandex-team.ru> 1456038374 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1457395874 -0800

TTY, devpts: document pty count limiting

Logic has been changed in kernel 3.4 by commit e9aba5158a80
("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>