CVSROOT: /cvs
Module name: src
Changes by: s...@cvs.openbsd.org 2015/07/20 16:28:57
Modified files:
sys/sys : tty.h
sys/kern : tty.c
Log message:
Fix tty hiwat handling a bit
- Introduce new defines TTHIWATMINSPACE, TTMINHIWAT for some magic values
that are used in tty.c.
- Remove hiwat adjustments in ttwrite(). This fixes this codepath not
being interrupt safe.
- Change ttysetwater() to keep at least TTHIWATMINSPACE space above the high
water mark. This makes it consistent with ttycheckoutq(). Without this
change, the hiwat adjustment change above causes deadlocks in pty.
ok kspillner@
commit it now deraadt@
