linux-stable/drivers/tty
Peter Hurley cbfd0340ae n_tty: Process echoes in blocks
Byte-by-byte echo output is painfully slow, requiring a lock/unlock
cycle for every input byte.

Instead, perform the echo output in blocks of 256 characters, and
at least once per flip buffer receive. Enough space is reserved in
the echo buffer to guarantee a full block can be saved without
overrunning the echo output. Overrun is prevented by discarding
the oldest echoes until enough space exists in the echo buffer
to receive at least a full block of new echoes.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-07-23 17:02:21 -07:00
..
hvc tty: replace strict_strtoul() with kstrtoul() 2013-06-03 10:30:42 -07:00
ipwireless tty: ipwireless: Remove redundant NULL check before kfree 2013-03-15 13:58:32 -07:00
serial Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-07-13 14:52:21 -07:00
vt tty: Fix unsafe vt paste_selection() 2013-07-23 16:47:10 -07:00
amiserial.c TTY: amiserial, use module_platform_driver_probe() 2013-03-15 13:55:23 -07:00
bfin_jtag_comm.c
cyclades.c TTY: add tty_port_tty_hangup helper 2013-03-18 16:24:29 -07:00
ehv_bytechan.c TTY: ehv_bytechan: add missing platform_driver_unregister() when module exit 2013-05-20 12:15:59 -07:00
goldfish.c
isicom.c
Kconfig
Makefile tty: Add timed, writer-prioritized rw semaphore 2013-05-20 12:30:32 -07:00
metag_da.c tty: metag_da: avoid getting tty kref in dashtty_timer() 2013-02-06 11:10:17 -08:00
moxa.c TTY: add tty_port_tty_hangup helper 2013-03-18 16:24:29 -07:00
moxa.h
mxser.c tty: mxser: Fix build warning introduced by dfc7b837c7 (Re: linux-next: build warning after merge of the tty.current tree) 2013-05-22 10:26:02 -07:00
mxser.h
n_gsm.c TTY: fix DTR not being dropped on hang up 2013-03-18 16:27:53 -07:00
n_hdlc.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c n_tty: Process echoes in blocks 2013-07-23 17:02:21 -07:00
nozomi.c TTY: add tty_port_tty_hangup helper 2013-03-18 16:24:29 -07:00
pty.c tty: Track flip buffer memory limit atomically 2013-07-23 16:47:08 -07:00
rocket.c TTY: rocket, fix more no-PCI warnings 2013-05-20 12:15:59 -07:00
rocket.h
rocket_int.h
synclink.c TTY: synclink: fix DTR being raised on hang up 2013-04-12 14:08:17 -07:00
synclink_gt.c TTY: synclink_gt: fix DTR being raised on hang up 2013-04-12 14:08:17 -07:00
synclinkmp.c TTY: synclinkmp: fix DTR being raised on hang up 2013-04-12 14:08:18 -07:00
sysrq.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-07-04 15:35:08 -07:00
tty_audit.c audit: do not needlessly take a lock in tty_audit_exit 2013-04-30 15:31:28 -04:00
tty_buffer.c tty: Remove private constant from global namespace 2013-07-23 16:47:10 -07:00
tty_io.c tty: Only guarantee termios read safety for throttle/unthrottle 2013-07-23 16:43:02 -07:00
tty_ioctl.c tty: Only guarantee termios read safety for throttle/unthrottle 2013-07-23 16:43:02 -07:00
tty_ldisc.c tty: Convert termios_mutex to termios_rwsem 2013-07-23 16:43:01 -07:00
tty_ldsem.c tty: Add timed, writer-prioritized rw semaphore 2013-05-20 12:30:32 -07:00
tty_mutex.c
tty_port.c tty: Complete ownership transfer of flip buffers 2013-03-18 16:44:02 -07:00