pids: increase pid_max based on num_possible_cpus

On a system with a substantial number of processors, the early default
pid_max of 32k will not be enough.  A system with 1664 CPU's, there are
25163 processes started before the login prompt.  It's estimated that with
2048 CPU's we will pass the 32k limit.  With 4096, we'll reach that limit
very early during the boot cycle, and processes would stall waiting for an
available pid.

This patch increases the early maximum number of pids available, and
increases the minimum number of pids that can be set during runtime.

[[email protected]: fix warnings]
Signed-off-by: Hedi Berriche <[email protected]>
Signed-off-by: Mike Travis <[email protected]>
Signed-off-by: Robin Holt <[email protected]>
Acked-by: Linus Torvalds <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Alan Cox <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: John Stoffel <[email protected]>
Cc: Jack Steiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions