diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2013-11-22 12:09:55 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 16:57:38 -0800 |
| commit | 4d18e6eff81e1d4d81d0942d5b7e96904b3b32df (patch) | |
| tree | a6c66c84189a50bff8b6b05a7187a8cda4b67cfc /include/linux | |
| parent | 82f91fe092b6eacd82e976b8955443f9fd97d07e (diff) | |
tty: Enable configurable tty flip buffer limit
Allow driver to configure its maximum flip buffer memory
consumption/limit. This is necessary for very-high speed line
rates (in excess of 10MB/sec) because the flip buffers can
be saturated before the line discipline has a chance to
throttle the input.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/tty.h | 1 | ||||
| -rw-r--r-- | include/linux/tty_flip.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 97d660ed70c..2225745060d 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -61,6 +61,7 @@ struct tty_bufhead { struct tty_buffer sentinel; struct llist_head free; /* Free queue head */ atomic_t memory_used; /* In-use buffers excluding free list */ + int mem_limit; struct tty_buffer *tail; /* Active buffer */ }; /* diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h index 21ddd7d9ea1..2da8bc2a548 100644 --- a/include/linux/tty_flip.h +++ b/include/linux/tty_flip.h @@ -1,6 +1,7 @@ #ifndef _LINUX_TTY_FLIP_H #define _LINUX_TTY_FLIP_H +extern int tty_buffer_set_limit(struct tty_port *port, int limit); extern int tty_buffer_space_avail(struct tty_port *port); extern int tty_buffer_request_room(struct tty_port *port, size_t size); extern int tty_insert_flip_string_flags(struct tty_port *port, |