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Marcelo Tosatti 7e6d72c15f vgacon.c: add cond reschedule points in vgacon_do_font_op 
Booting a 64-vcpu KVM guest, with CONFIG_PREEMPT_VOLUNTARY,
can result in a soft lockup:

BUG: soft lockup - CPU#41 stuck for 67s! [setfont:1505]
 RIP: 0010:[<ffffffff812c48da>]
[<ffffffff812c48da>] vgacon_do_font_op.clone.0+0x1ba/0x550

This is due to the 8192 (cmapsz) IO operations taking longer than expected
due to lock contention in QEMU.

Add conditional resched points in between writes allowing other tasks to
execute.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-06-26 16:27:55 +10:00
..
accessibility
acpi PCI updates for v3.10: 2013-05-23 13:50:53 -07:00
amba
ata drivers/ata: don't check resource with devm_ioremap_resource 2013-05-12 15:19:46 +02:00
atm atm: he: use mdelay instead of large udelay constants 2013-04-29 13:26:48 -04:00
auxdisplay
base Driver core fixes for 3.10-rc2 2013-05-23 09:27:08 -07:00
bcma - Lots of cleanups from Artem, including deletion of some obsolete drivers 2013-05-09 10:15:46 -07:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2013-05-15 13:36:19 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
bus
cdrom block_device_operations->release() should return void 2013-05-07 02:16:21 -04:00
char drm, agpgart: Use pgprot_writecombine for AGP maps and make the MTRR optional 2013-05-31 13:37:31 +10:00
clk ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
clocksource ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
connector
cpufreq MIPS: Idle: Consolidate all declarations in <asm/idle.h>. 2013-05-22 01:34:27 +02:00
cpuidle cpuidle: add maintainer entry 2013-04-26 22:30:25 +02:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2013-05-02 14:53:12 -07:00
dca
devfreq
dio
dma drivers/dma: don't check resource with devm_ioremap_resource 2013-05-18 11:54:55 +02:00
edac Two small EDAC fixes. 2013-05-09 10:11:08 -07:00
eisa PCI changes for the v3.10 merge window: 2013-04-29 09:30:25 -07:00
extcon Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
firewire IEEE 1394 (FireWire) subsystem changes: 2013-05-09 10:11:48 -07:00
firmware Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
gpio drivers/gpio: don't check resource with devm_ioremap_resource 2013-05-18 11:55:19 +02:00
gpu drm: fix fb leak in setcrtc 2013-06-25 13:04:11 +10:00
hid HID: debug: fix RCU preemption issue 2013-05-06 13:07:33 +02:00
hsi
hv Drivers: hv: Fix a bug in get_vp_index() 2013-05-21 09:56:55 -07:00
hwmon hwmon: (tmp401) Drop redundant safety on cache lifetime 2013-05-19 08:19:29 -07:00
hwspinlock A single patch from Vincent extending OMAP's hwspinlock support to OMAP5. 2013-05-07 14:01:27 -07:00
i2c Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-05-21 11:11:45 -07:00
ide block_device_operations->release() should return void 2013-05-07 02:16:21 -04:00
idle Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2013-05-11 15:23:17 -07:00
iio iio: exynos_adc: fix wrong structure extration in suspend and resume 2013-05-22 22:15:20 +01:00
infiniband InfiniBand/RDMA changes for the 3.10 merge window: 2013-05-08 15:29:48 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-05-23 13:50:03 -07:00
iommu IOMMU Updates for Linux v3.10 2013-05-06 14:59:13 -07:00
ipack
irqchip ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
isdn Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
leds leds: leds-gpio: reserve gpio before using it 2013-05-21 11:26:53 -07:00
lguest lguest: clear cached last cpu when guest_set_pgd() called. 2013-05-08 10:49:18 +09:30
macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-05-02 10:16:16 -07:00
mailbox
md dm thin: fix metadata dev resize detection 2013-05-19 18:57:50 +01:00
media Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-05-02 14:38:53 -07:00
memory drivers/memory: don't check resource with devm_ioremap_resource 2013-05-18 11:55:52 +02:00
memstick block_device_operations->release() should return void 2013-05-07 02:16:21 -04:00
message Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block 2013-05-08 10:13:35 -07:00
mfd This is the first batch of MFD fixes for 3.10. 2013-05-22 07:18:41 -07:00
misc char/misc driver fixes for 3.10-rc2 2013-05-23 09:26:32 -07:00
mmc Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-05-15 13:37:54 -07:00
mtd drivers/mtd/nand: don't check resource with devm_ioremap_resource 2013-05-18 11:55:55 +02:00
net USB fixes for 3.10-rc2 2013-05-23 09:23:32 -07:00
nfc
ntb NTB: Multiple NTB client fix 2013-05-15 10:58:22 -07:00
nubus nubus: Kill nubus_proc_detach_device() 2013-05-04 14:47:26 -04:00
of Device tree bug fixes and documentation updates for v3.10 2013-05-18 10:46:50 -07:00
oprofile
parisc parisc: fix partly 16/64k PAGE_SIZE boot 2013-05-06 23:08:32 +02:00
parport
pci PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check 2013-05-17 14:12:06 -06:00
pcmcia
pinctrl Pinctrl fixes for the v3.10 series: 2013-05-20 07:59:46 -07:00
platform - Artem's removal of dead code continues (RPX, MBX860) 2013-05-10 09:09:47 -07:00
pnp Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-05-02 10:16:16 -07:00
power For 3.10 we have a few new MFD drivers for: 2013-05-05 17:36:20 -07:00
pps Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
ps3
ptp
pwm drivers/pwm: don't check resource with devm_ioremap_resource 2013-05-18 11:55:58 +02:00
rapidio
regulator Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
remoteproc This pull request contains: 2013-05-07 14:04:56 -07:00
reset
rpmsg A small pull request consisting of: 2013-05-07 14:02:00 -07:00
rtc Merge branch 'devm_no_resource_check' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-05-18 10:54:54 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-05-21 09:36:46 -07:00
sbus
scsi Merge branch 'postmerge' into for-linus 2013-05-10 07:54:01 -07:00
sfi
sh
sn
spi Merge branch 'devm_no_resource_check' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-05-18 10:54:54 -07:00
ssb - Lots of cleanups from Artem, including deletion of some obsolete drivers 2013-05-09 10:15:46 -07:00
ssbi
staging drm: Drop all the stub gamma_get, gamma_set, load_lut functions from drivers 2013-06-17 19:42:47 +10:00
target Merge branch 'queue' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-05-16 07:55:07 -07:00
tc
thermal drivers/thermal: don't check resource with devm_ioremap_resource 2013-05-18 11:57:30 +02:00
tty 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
uio uio: UIO_DMEM_GENIRQ should depend on HAS_DMA 2013-05-21 10:13:23 -07:00
usb USB fixes for 3.10-rc2 2013-05-23 09:23:32 -07:00
uwb uwb: rename random32() to prandom_u32() 2013-04-29 18:28:43 -07:00
vfio vfio updates for v3.10 2013-05-02 14:02:32 -07:00
vhost Add missing module license tag to vring helpers. 2013-05-08 10:49:03 +09:30
video vgacon.c: add cond reschedule points in vgacon_do_font_op 2013-06-26 16:27:55 +10:00
virt
virtio
vlynq
vme
w1 drivers/w1/masters: don't check resource with devm_ioremap_resource 2013-05-18 11:58:03 +02:00
watchdog drivers/watchdog: don't check resource with devm_ioremap_resource 2013-05-18 11:58:04 +02:00
xen xen: Fixed assignment error in if statement 2013-05-20 14:14:48 -04:00
zorro proc: Supply PDE attribute setting accessor functions 2013-05-01 17:29:18 -04:00
Kconfig ARM: arm-soc driver changes for 3.10 2013-05-04 12:31:18 -07:00
Makefile ARM: arm-soc driver changes for 3.10 2013-05-04 12:31:18 -07:00