Amit Shah 531295e63b virtio: console: Don't block entire guest if host doesn't read data ... If the host is slow in reading data or doesn't read data at all, blocking write calls not only blocked the program that called write() but the entire guest itself. To overcome this, let's not block till the host signals it has given back the virtio ring element we passed it. Instead, send the buffer to the host and return to userspace. This operation then becomes similar to how non-blocking writes work, so let's use the existing code for this path as well. This code change also ensures blocking write calls do get blocked if there's not enough room in the virtio ring as well as they don't return -EAGAIN to userspace. Signed-off-by: Amit Shah <amit.shah@redhat.com> Acked-by: Hans de Goede <hdegoede@redhat.com> CC: stable@kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-10-20 13:18:04 -07:00
..
agp	drm/i915,agp/intel: Add second set of PCI-IDs for B43	2010-09-17 08:22:30 +01:00
hw_random	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2010-09-07 14:35:16 -07:00
ip2	ip2: return -EFAULT on copy_to_user errors	2010-08-23 18:17:21 -07:00
ipmi	ipmi: fix hardcoded ipmi device exit path warning	2010-09-22 17:22:40 -07:00
mwave	mwave: fix read buffer overflow	2009-09-24 07:21:03 -07:00
pcmcia	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2010-08-09 21:05:52 -07:00
rio	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
tpm	tpm_tis: fix subsequent suspend failures	2010-07-26 10:25:45 +10:00
xilinx_hwicap	of: Fix missing includes	2010-08-16 23:44:49 -06:00
.gitignore	…
Kconfig	pc8736x_gpio: depends on X86_32	2010-08-12 08:43:29 -07:00
Makefile	tty: implement BTM as mutex instead of BKL	2010-08-10 13:47:44 -07:00
amiserial.c	tty: release BTM while sleeping in block_til_ready	2010-08-10 13:47:44 -07:00
apm-emulation.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
applicom.c	drivers/char/applicom.c: use memdup_user	2010-05-27 09:12:50 -07:00
applicom.h	…
bfin-otp.c	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
bfin_jtag_comm.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
briq_panel.c	tty: replace BKL with a new tty_lock	2010-08-10 13:47:43 -07:00
bsr.c	of/address: Clean up function declarations	2010-08-01 01:42:42 -06:00
cd1865.h	…
consolemap.c	consolemap: indentation & braces disagree - reindent	2009-01-06 15:59:30 -08:00
cp437.uni	unicode table for cp437	2008-12-13 11:25:49 -08:00
cs5535_gpio.c	drivers: Remove BKL from cs5535_gpio	2009-10-14 17:36:48 +02:00
cyclades.c	tty: introduce wait_event_interruptible_tty	2010-08-10 13:47:43 -07:00
defkeymap.c_shipped	…
defkeymap.map	…
digi1.h	…
digiFep1.h	…
digiPCI.h	…
ds1302.c	rtc: use bcd2bin/bin2bcd	2008-10-20 08:52:41 -07:00
ds1620.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
dsp56k.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
dtlk.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
efirtc.c	efirtc: explicitly set llseek to no_llseek	2009-12-16 07:19:59 -08:00
epca.c	epca: Kill the big kernel lock	2010-08-10 13:47:40 -07:00
epca.h	…
epcaconfig.h	…
generic_nvram.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
generic_serial.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
genrtc.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
hangcheck-timer.c	Input: sysrq - drop tty argument form handle_sysrq()	2010-08-21 00:34:45 -07:00
hpet.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
hvc_beat.c	Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6	2010-02-25 15:38:37 -08:00
hvc_console.c	Input: sysrq - drop tty argument form handle_sysrq()	2010-08-21 00:34:45 -07:00
hvc_console.h	hvc_console: make the ops pointer const.	2010-02-24 14:22:32 +10:30
hvc_irq.c	hvc_console: Call free_irq() only if request_irq() was successful	2009-01-13 14:48:01 +11:00
hvc_iseries.c	Merge branch 'for-next' into for-linus	2010-03-08 16:55:37 +01:00
hvc_iucv.c	Add param ops struct for hvc_iucv driver.	2010-08-11 23:04:16 +09:30
hvc_rtas.c	hvc_console: make the ops pointer const.	2010-02-24 14:22:32 +10:30
hvc_tile.c	arch/tile: catch up on various minor cleanups.	2010-07-06 13:42:15 -04:00
hvc_udbg.c	hvc_console: make the ops pointer const.	2010-02-24 14:22:32 +10:30
hvc_vio.c	hvc_console: make the ops pointer const.	2010-02-24 14:22:32 +10:30
hvc_xen.c	hvc_console: make the ops pointer const.	2010-02-24 14:22:32 +10:30
hvcs.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
hvsi.c	Input: sysrq - drop tty argument form handle_sysrq()	2010-08-21 00:34:45 -07:00
i8k.c	procfs: Push down the bkl from ioctl	2010-05-17 03:06:12 +02:00
isicom.c	isicom: kill off the BKL	2010-08-10 13:47:40 -07:00
istallion.c	tty: introduce wait_event_interruptible_tty	2010-08-10 13:47:43 -07:00
keyboard.c	tty: Move the vt_tty field from the vc_data into the standard tty_port	2010-08-10 13:47:42 -07:00
lp.c	lp: move compat_ioctl handling into lp.c	2009-12-10 22:55:36 +01:00
mbcs.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
mbcs.h	…
mem.c	char: Mark /dev/zero and /dev/kmem as not capable of writeback	2010-09-22 09:48:47 +02:00
misc.c	char: add WARN_ON() in misc_deregister()	2010-08-09 20:45:06 -07:00
mmtimer.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
moxa.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
moxa.h	…
mspec.c	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
mxser.c	mxser: remove unnesesary NULL check	2010-08-10 13:47:45 -07:00
mxser.h	…
n_gsm.c	drivers/char/n_gsm.c: add missing spin_unlock_irqrestore	2010-08-11 08:59:20 -07:00
n_hdlc.c	tty: replace BKL with a new tty_lock	2010-08-10 13:47:43 -07:00
n_r3964.c	tty: introduce wait_event_interruptible_tty	2010-08-10 13:47:43 -07:00
n_tty.c	tty: Add EXTPROC support for LINEMODE	2010-08-10 13:47:39 -07:00
nozomi.c	kfifo: fix kfifo miss use of nozami.c	2010-08-11 08:59:23 -07:00
nsc_gpio.c	…
nvram.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
nwbutton.c	…
nwbutton.h	…
nwflash.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
pc8736x_gpio.c	drivers: Remove BKL from pc8736x_gpio	2009-10-14 17:36:52 +02:00
ppdev.c	drivers/char/ppdev.c: use kasprintf	2010-05-27 09:12:50 -07:00
ps3flash.c	drop unused dentry argument to ->fsync	2010-05-27 22:05:02 -04:00
pty.c	tty: fix fu_list abuse	2010-08-18 08:35:47 -04:00
ramoops.c	char drivers: RAM oops/panic logger	2010-05-27 09:12:50 -07:00
random.c	random: Reorder struct entropy_store to remove padding on 64bits	2010-07-31 19:58:00 +08:00
raw.c	drivers: Push down BKL into various drivers	2010-05-17 05:27:41 +02:00
riscom8.c	riscom8: kill use of lock_kernel	2010-08-10 13:47:40 -07:00
riscom8.h	…
riscom8_reg.h	…
rocket.c	rocket: add a mutex_unlock()	2010-08-23 18:17:21 -07:00
rocket.h	tty: rocketport uses different port flags to everyone else	2009-01-02 10:19:39 -08:00
rocket_int.h	tty: rocketport uses different port flags to everyone else	2009-01-02 10:19:39 -08:00
rtc.c	of/device: Replace struct of_device with struct platform_device	2010-08-06 09:25:50 -06:00
scc.h	m68k: atari - Rename "mfp" to "st_mfp"	2009-02-22 09:23:02 -08:00
scx200_gpio.c	drivers: Remove BKL from scx200_gpio	2009-10-14 17:36:53 +02:00
selection.c	tty: remove tty_lock_nested	2010-08-10 13:47:44 -07:00
ser_a2232.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
ser_a2232.h	…
ser_a2232fw.ax	…
ser_a2232fw.h	…
serial167.c	tty: release BTM while sleeping in block_til_ready	2010-08-10 13:47:44 -07:00
snsc.c	…
snsc.h	…
snsc_event.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
sonypi.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
specialix.c	tty: release BTM while sleeping in block_til_ready	2010-08-10 13:47:44 -07:00
specialix_io8.h	…
stallion.c	stallion: prune lock_kernel calls	2010-08-10 13:47:40 -07:00
sx.c	tty: replace BKL with a new tty_lock	2010-08-10 13:47:43 -07:00
sx.h	…
sxboards.h	…
sxwindow.h	…
synclink.c	tty: release BTM while sleeping in block_til_ready	2010-08-10 13:47:44 -07:00
synclink_gt.c	synclink: add mutex_unlock() on error path	2010-08-23 18:17:21 -07:00
synclinkmp.c	tty: release BTM while sleeping in block_til_ready	2010-08-10 13:47:44 -07:00
sysrq.c	Input: sysrq - drop tty argument form handle_sysrq()	2010-08-21 00:34:45 -07:00
tb0219.c	mips: Remove BKL from tb0219	2009-10-14 17:36:53 +02:00
tlclk.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
toshiba.c	tosh: Use non bkl ioctl	2010-01-04 12:31:21 -08:00
tty_audit.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
tty_buffer.c	tty: fix obsolete comment on tty_insert_flip_string_fixed_flag	2010-05-21 09:34:30 -07:00
tty_io.c	tty: fix tty_line must not be equal to number of allocated tty pointers in tty driver	2010-09-03 17:29:04 -07:00
tty_ioctl.c	tty: Add EXTPROC support for LINEMODE	2010-08-10 13:47:39 -07:00
tty_ldisc.c	tty: remove tty_lock_nested	2010-08-10 13:47:44 -07:00
tty_mutex.c	tty: implement BTM as mutex instead of BKL	2010-08-10 13:47:44 -07:00
tty_port.c	tty: release BTM while sleeping in block_til_ready	2010-08-10 13:47:44 -07:00
uv_mmtimer.c	x86, UV: Fix RTC latency bug by reading replicated cachelines	2010-01-27 11:33:53 +01:00
vc_screen.c	tty: replace BKL with a new tty_lock	2010-08-10 13:47:43 -07:00
viotape.c	of: Always use 'struct device.of_node' to get device node pointer.	2010-05-18 16:10:44 -06:00
virtio_console.c	virtio: console: Don't block entire guest if host doesn't read data	2010-10-20 13:18:04 -07:00
vme_scc.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
vt.c	vt: Fix console corruption on driver hand-over.	2010-09-03 17:29:03 -07:00
vt_ioctl.c	Input: use PIT_TICK_RATE in vt beep ioctl	2010-08-28 21:39:09 -07:00