diff options
Diffstat (limited to 'drivers/tty/tty_buffer.c')
| -rw-r--r-- | drivers/tty/tty_buffer.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index f22e116db10..c043136fbe5 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -28,6 +28,16 @@ */ #define TTYB_MEM_LIMIT 65536 +/* + * We default to dicing tty buffer allocations to this many characters + * in order to avoid multiple page allocations. We know the size of + * tty_buffer itself but it must also be taken into account that the + * the buffer is 256 byte aligned. See tty_buffer_find for the allocation + * logic this must match + */ + +#define TTY_BUFFER_PAGE (((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF) + /** * tty_buffer_lock_exclusive - gain exclusive access to buffer |