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Hans Verkuil 879aa24d63 [media] V4L: improve the BKL replacement heuristic 
The BKL replacement mutex had some serious performance side-effects on
V4L drivers. It is replaced by a better heuristic that works around the
worst of the side-effects.

Read the v4l2-dev.c comments for the whole sorry story. This is a
temporary measure only until we can convert all v4l drivers to use
unlocked_ioctl.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
 		2010-12-01 20:10:19 -02:00
..
au0828 [media] v4l: Remove hardcoded module names passed to v4l2_i2c_new_subdev* 2010-10-22 21:50:56 -02:00
bt8xx [media] drivers/media/video/bt8xx: Adjust confusing if indentation 2010-10-22 23:25:13 -02:00
cpia2 V4L/DVB: cpia2: remove V4L1 support from this driver 2010-10-21 01:06:17 -02:00
cx18 [media] cx18: convert to unlocked_ioctl 2010-12-01 20:10:16 -02:00
cx88 Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2010-10-28 09:35:11 -07:00
cx231xx [media] v4l: kill the BKL 2010-11-08 22:35:57 -02:00
cx23885 [media] v4l: kill the BKL 2010-11-08 22:35:57 -02:00
cx25840 [media] IR: initialize ir_raw_event in few more drivers 2010-10-25 18:54:28 -02:00
davinci [media] vpif_capture: Don't use module names to load I2C modules 2010-10-22 21:54:20 -02:00
em28xx [media] v4l: Remove hardcoded module names passed to v4l2_i2c_new_subdev* 2010-10-22 21:50:56 -02:00
et61x251 [media] et61x251_core: trivial conversion to unlocked_ioctl 2010-12-01 20:10:12 -02:00
gspca [media] gspca: Fix coding style issues 2010-10-21 14:50:06 -02:00
hdpvr [media] hdpvr: add usb product id 0x4903 2010-10-21 07:56:07 -02:00
ivtv Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2010-10-28 09:35:11 -07:00
omap V4L/DVB: videobuf: add ext_lock argument to the queue init functions (part 2) 2010-10-21 01:06:19 -02:00
pvrusb2 [media] pvrusb2: Don't use module names to load I2C modules 2010-10-22 21:53:15 -02:00
pwc V4L/DVB: pwc: remove BKL 2010-10-21 01:05:57 -02:00
s5p-fimc [media] s5p-fimc: dubious one-bit signed bitfields 2010-10-22 22:09:21 -02:00
saa7134 [media] saa7134: Fix autodetect for Behold A7 and H7 TV cards 2010-11-09 10:12:47 -02:00
saa7164 [media] saa7164: Removed use of the BKL 2010-10-21 07:55:32 -02:00
sn9c102 [media] sn9c102: convert to unlocked_ioctl 2010-12-01 20:10:11 -02:00
tlg2300 [media] v4l: kill the BKL 2010-11-08 22:35:57 -02:00
usbvideo [media] v4l: kill the BKL 2010-11-08 22:35:57 -02:00
usbvision [media] v4l: Remove hardcoded module names passed to v4l2_i2c_new_subdev* 2010-10-22 21:50:56 -02:00
uvc [media] uvcvideo: Fix uvc_query_v4l2_ctrl() and uvc_xu_ctrl_query() locking 2010-10-21 01:18:26 -02:00
zoran [media] v4l: kill the BKL 2010-11-08 22:35:57 -02:00
Kconfig Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2010-10-28 09:35:11 -07:00
Makefile [media] Add the via framebuffer camera controller driver 2010-10-21 13:45:28 -02:00
adv7170.c V4L/DVB: adv7170: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:04 -02:00
adv7175.c V4L/DVB: adv7175: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:01 -02:00
adv7180.c V4L/DVB: v4l: remove unused i2c-id.h headers 2010-10-21 01:06:05 -02:00
adv7343.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
adv7343_regs.h
…
ak881x.c V4L/DVB: mediabus: fix ambiguous pixel code names 2010-08-02 16:43:36 -03:00
arv.c [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions 2010-12-01 20:10:10 -02:00
bt819.c V4L/DVB: bt819: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:59 -02:00
bt856.c V4L/DVB: bt856: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:02 -02:00
bt866.c V4L/DVB: bt866: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:00 -02:00
btcx-risc.c
…
btcx-risc.h
…
bw-qcam.c [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions 2010-12-01 20:10:10 -02:00
c-qcam.c [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions 2010-12-01 20:10:10 -02:00
cafe_ccic-regs.h
…
cafe_ccic.c [media] cafe_ccic: replace ioctl by unlocked_ioctl 2010-12-01 20:10:13 -02:00
cs53l32a.c V4L/DVB: cs53l32a: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:03 -02:00
cs5345.c V4L/DVB: cs5345: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:57 -02:00
cs8420.h
…
cx2341x.c V4L/DVB: cx2341x: convert to the control framework 2010-08-08 23:43:05 -03:00
dabusb.c dabusb: remove the BKL 2010-10-19 11:30:00 +02:00
dabusb.h
…
fsl-viu.c [media] v4l: Remove hardcoded module names passed to v4l2_i2c_new_subdev* 2010-10-22 21:50:56 -02:00
hexium_gemini.c [media] i2c: Stop using I2C_CLASS_TV_ANALOG 2010-10-21 07:54:25 -02:00
hexium_orion.c [media] i2c: Stop using I2C_CLASS_TV_ANALOG 2010-10-21 07:54:25 -02:00
ibmmpeg2.h
…
imx074.c i2c: Remove obsolete cleanup for clientdata 2010-11-15 22:40:38 +01:00
indycam.c V4L/DVB: indycam: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:59 -02:00
indycam.h
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ir-kbd-i2c.c i2c: Drivers shouldn't include <linux/i2c-id.h> 2010-11-15 22:40:38 +01:00
ks0127.c V4L/DVB: ks0127: remove obsolete v4l2_i2c_drv.h header 2010-10-21 01:06:04 -02:00
ks0127.h
…
m52790.c V4L/DVB: m52790: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:59 -02:00
mem2mem_testdev.c V4L/DVB: videobuf: add queue argument to videobuf_waiton() 2010-10-21 01:06:14 -02:00
meye.c [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions 2010-12-01 20:10:10 -02:00
meye.h V4L/DVB: meye: remove last V4L1 remnants from the code and add v4l2_device 2010-05-18 00:52:36 -03:00
msp3400-driver.c [media] msp3400: fix mute audio regression 2010-10-21 08:56:41 -02:00
msp3400-driver.h V4L/DVB: msp3400: convert to the new control framework 2010-08-08 23:43:04 -03:00
msp3400-kthreads.c V4L/DVB: msp3400: convert to the new control framework 2010-08-08 23:43:04 -03:00
mt9m001.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
mt9m111.c [media] mt9m111: changed MIN_DARK_COLS to MT9M131 spec count 2010-10-21 07:55:35 -02:00
mt9t031.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
mt9t112.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
mt9v011.c V4L/DVB: mt9v011: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:58 -02:00
mt9v011.h V4L/DVB (12340): mtv9v011: Add a missing chip version to the driver 2009-08-13 20:39:02 -03:00
mt9v022.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
mx1_camera.c V4L/DVB: videobuf: add ext_lock argument to the queue init functions (part 2) 2010-10-21 01:06:19 -02:00
mx2_camera.c [media] soc-camera: Compile fixes for mx2-camera 2010-11-09 15:16:31 -02:00
mx3_camera.c [media] ARM mx3_camera: check for DMA engine type 2010-11-09 15:07:28 -02:00
mxb.c Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2010-10-28 09:35:11 -07:00
mxb.h
…
omap1_camera.c [media] SOC Camera: OMAP1: typo fix 2010-11-09 15:15:42 -02:00
omap24xxcam-dma.c
…
omap24xxcam.c V4L/DVB: videobuf: add ext_lock argument to the queue init functions (part 2) 2010-10-21 01:06:19 -02:00
omap24xxcam.h
…
ov772x.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
ov6650.c i2c: Remove obsolete cleanup for clientdata 2010-11-15 22:40:38 +01:00
ov7670.c [media] ov7670: allow configuration of image size, clock speed, and I/O method 2010-10-23 13:09:23 -02:00
ov7670.h [media] ov7670: allow configuration of image size, clock speed, and I/O method 2010-10-23 13:09:23 -02:00
ov9640.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
ov9640.h V4L/DVB (13040): V4L2: Add a v4l2-subdev (soc-camera) driver for OmniVision OV9640 sensor 2009-12-05 18:40:01 -02:00
pms.c [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions 2010-12-01 20:10:10 -02:00
pxa_camera.c V4L/DVB: videobuf: add ext_lock argument to the queue init functions (part 2) 2010-10-21 01:06:19 -02:00
rj54n1cb0c.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
s2255drv.c V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00
saa711x_regs.h
…
saa717x.c V4L/DVB: saa717x: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:58 -02:00
saa6588.c [media] [RFC,1/1] V4L2: Use new CAP bits in existing RDS capable drivers 2010-10-22 23:49:47 -02:00
saa7110.c V4L/DVB: saa7110: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:02 -02:00
saa7115.c V4L/DVB: saa7115: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:58 -02:00
saa7121.h
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saa7127.c V4L/DVB: saa7127: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:04 -02:00
saa7146.h
…
saa7146reg.h
…
saa7185.c V4L/DVB: saa7185: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:59 -02:00
saa7191.c V4L/DVB: saa7191: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:02 -02:00
saa7191.h
…
se401.c [media] v4l: kill the BKL 2010-11-08 22:35:57 -02:00
se401.h V4L/DVB (11998): se401: Fix coding style 2009-06-16 19:07:54 -03:00
sh_mobile_ceu_camera.c [media] V4L: sh_mobile_ceu_camera: use default .get_parm() and .set_parm() operations 2010-10-21 07:55:42 -02:00
sh_mobile_csi2.c V4L/DVB: V4L2: soc-camera: add a MIPI CSI-2 driver for SH-Mobile platforms 2010-08-02 16:43:39 -03:00
sh_vou.c [media] sh_vou: convert to unlocked_ioctl 2010-12-01 20:10:14 -02:00
soc_camera.c [media] soc_camera: Don't use module names to load I2C modules 2010-10-22 21:53:52 -02:00
soc_camera_platform.c V4L/DVB: soc_camera_platform: Add necessary v4l2_subdev_video_ops method 2010-08-02 14:05:37 -03:00
soc_mediabus.c V4L/DVB: mediabus: fix ambiguous pixel code names 2010-08-02 16:43:36 -03:00
sr030pc30.c [media] SR030PC30: Avoid use of uninitialized variables 2010-10-21 11:05:36 -02:00
stk-sensor.c
…
stk-webcam.c [media] v4l: kill the BKL 2010-11-08 22:35:57 -02:00
stk-webcam.h
…
tcm825x.c i2c: Remove all i2c_set_clientdata(client, NULL) in drivers 2010-06-03 11:33:58 +02:00
tcm825x.h
…
tda7432.c V4L/DVB: tda7432: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:03 -02:00
tda9840.c V4L/DVB: tda9840: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:58 -02:00
tda9875.c V4L/DVB: tda9875: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:02 -02:00
tea6415c.c V4L/DVB: tea6415c: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:00 -02:00
tea6415c.h
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tea6420.c V4L/DVB: tea6420: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:03 -02:00
tea6420.h
…
ths7303.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
tlv320aic23b.c V4L/DVB: tlv320aic23b: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:02 -02:00
tuner-core.c [media] tda18271: allow restricting max out to 4 bytes 2010-10-21 01:17:43 -02:00
tvaudio.c V4L/DVB: tvaudio: remove obsolete tda8425 initialization 2010-10-21 01:06:09 -02:00
tveeprom.c V4L/DVB: tveeprom: Add an entry for tuner code 168: a TCL M30WTP-4N-E tuner 2010-07-08 16:49:59 -03:00
tvp514x.c V4L/DVB: tvp514x: remove obsolete enum/try/s/g_fmt 2010-10-21 01:04:37 -02:00
tvp514x_regs.h V4L/DVB (12246): tvp514x: Migration to sub-device framework 2009-09-19 00:18:09 -03:00
tvp5150.c [media] tvp5150: COMPOSITE0 input should not force-enable TV mode 2010-10-21 07:54:24 -02:00
tvp5150_reg.h
…
tvp7002.c V4L/DVB: tvp7002: remove obsolete enum/try/s/g_fmt 2010-10-21 01:04:38 -02:00
tvp7002_reg.h V4L/DVB: Definitions for TVP7002 in DM365 2010-02-26 15:11:01 -03:00
tw9910.c V4L/DVB: v4l: Use v4l2_get_subdevdata instead of accessing v4l2_subdev::priv 2010-10-21 01:04:51 -02:00
upd64031a.c V4L/DVB: upd64031a: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:58 -02:00
upd64083.c V4L/DVB: upd64083: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:03 -02:00
v4l1-compat.c [media] Guard a divide in v4l1 compat layer 2010-10-25 18:53:44 -02:00
v4l2-common.c [media] v4l: Load I2C modules based on modalias 2010-10-22 21:34:17 -02:00
v4l2-compat-ioctl32.c v4l1: fix 32-bit compat microcode loading translation 2010-10-15 11:12:38 -07:00
v4l2-ctrls.c V4L/DVB: v4l2: Add illuminator controls 2010-10-21 01:05:54 -02:00
v4l2-dev.c [media] V4L: improve the BKL replacement heuristic 2010-12-01 20:10:19 -02:00
v4l2-device.c [media] V4L: improve the BKL replacement heuristic 2010-12-01 20:10:19 -02:00
v4l2-event.c V4L/DVB: v4l2: add core serialization lock 2010-10-21 01:06:14 -02:00
v4l2-fh.c V4L/DVB: V4L: Events: Support event handling in do_ioctl 2010-05-19 12:58:07 -03:00
v4l2-int-device.c
…
v4l2-ioctl.c V4L/DVB: v4l2: hook up the new control framework into the core framework 2010-08-08 23:43:04 -03:00
v4l2-mem2mem.c V4L/DVB: videobuf: prepare to make locking optional in videobuf 2010-10-21 01:06:14 -02:00
via-camera.c [media] Add the via framebuffer camera controller driver 2010-10-21 13:45:28 -02:00
via-camera.h [media] Add the via framebuffer camera controller driver 2010-10-21 13:45:28 -02:00
videobuf-core.c V4L/DVB: videobuf: add queue argument to videobuf_waiton() 2010-10-21 01:06:14 -02:00
videobuf-dma-contig.c [media] v4l: videobuf: remove unused is_userptr variable 2010-10-21 07:55:56 -02:00
videobuf-dma-sg.c [media] videobuf-dma-sg: Use min_t(size_t, PAGE_SIZE ..) 2010-10-21 01:17:00 -02:00
videobuf-dvb.c V4L/DVB: videobuf: add queue argument to videobuf_waiton() 2010-10-21 01:06:14 -02:00
videobuf-vmalloc.c V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00
vino.c [media] v4l: Remove hardcoded module names passed to v4l2_i2c_new_subdev* 2010-10-22 21:50:56 -02:00
vino.h
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vivi.c V4L/DVB: vivi: remove BKL 2010-10-21 01:06:15 -02:00
vp27smpx.c V4L/DVB: vp27smpx: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:57 -02:00
vpx3220.c V4L/DVB: vpx3220: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:06:03 -02:00
w9966.c [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions 2010-12-01 20:10:10 -02:00
wm8739.c V4L/DVB: wm8739: remove obsolete v4l2-i2c-drv.h header 2010-10-21 01:05:57 -02:00
wm8775.c [media] Nova-S-Plus audio line input 2010-10-23 01:17:52 -02:00
zr364xx.c V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00