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3afb1b394a
linux/drivers/tty
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Peter Hurley 3afb1b394a n_tty: Special case pty flow control 
The pty driver forces ldisc flow control on, regardless of available
receive buffer space, so the writer can be woken whenever unthrottle
is called. However, this 'forced throttle' has performance
consequences, as multiple atomic operations are necessary to
unthrottle and perform the write wakeup for every input line (in
canonical mode).

Instead, short-circuit the unthrottle if the tty is a pty and perform
the write wakeup directly.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-07-23 16:43:03 -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: Convert termios_mutex to termios_rwsem 2013-07-23 16:43:01 -07:00
amiserial.c TTY: amiserial, use module_platform_driver_probe() 2013-03-15 13:55:23 -07:00
bfin_jtag_comm.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
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 goldfish: move to tty_port for flip buffers 2013-01-25 08:09:38 -08:00
isicom.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
Kconfig tty: metag_da: Add metag DA TTY driver 2013-02-06 11:10:17 -08:00
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: Special case pty flow control 2013-07-23 16:43:03 -07:00
nozomi.c TTY: add tty_port_tty_hangup helper 2013-03-18 16:24:29 -07:00
pty.c tty: Convert termios_mutex to termios_rwsem 2013-07-23 16:43:01 -07:00
rocket_int.h
rocket.c TTY: rocket, fix more no-PCI warnings 2013-05-20 12:15:59 -07:00
rocket.h
synclink_gt.c TTY: synclink_gt: fix DTR being raised on hang up 2013-04-12 14:08:17 -07:00
synclink.c TTY: synclink: 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: Make ldisc input flow control concurrency-friendly 2013-07-23 16:42:59 -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: tty_mutex.c: Fixed coding style warning (using printk) 2012-10-24 11:34:51 -07:00
tty_port.c tty: Complete ownership transfer of flip buffers 2013-03-18 16:44:02 -07:00