Eric Piel [Mon, 21 May 2007 04:46:31 +0000 (00:46 -0400)]
Input: wistron - add LED support
Add support to wistron_btns for leds that come with the multimedia keys.
Mail and wifi leds are supported, on laptops which have them.
Depending on the laptop, wifi subsystem may control just the led, or both
the led and the wifi card. Wifi led interface is activated only for the
former type of laptops, as the latter type is already managed. Leds are
controled by the interface in /sys/class/leds.
Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Eric Piel [Mon, 21 May 2007 04:46:22 +0000 (00:46 -0400)]
Input: wriston - reduce polling frequency
Reduces the polling frequency from 10 Hz to 2 Hz, which should be less a burden
for laptops wrt energy saving. As it is multimedia keys, 500ms (maximum) of
latency should be still fine for the user. In order to keep fluent the feeling
when the user is pressing several keys in a raw (such as changing the volume),
the frequency is increased for a short duration after a key is pressed.
Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Rene van Paassen [Mon, 21 May 2007 04:32:17 +0000 (00:32 -0400)]
Input: aiptek - rework the function key code
Function keys (also called macro keys) code corrected. Using a
lastMacro variable to keep track of key currently pressed. This
ensures proper resetting when dragging the pen in the drawing
area or to another key. Also suppress sending pressure reports
when over the macro key area.
Signed-off-by: Rene van Paassen <rene.vanpaassen@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Rene van Paassen [Mon, 21 May 2007 04:31:55 +0000 (00:31 -0400)]
Input: aiptek - use set_bit instead of bitwise or
Have to use set_bit since some bit values are over 32, and bitwise or
won't work on these. To be safe for the future too, use set_bit for all
input dev capabilities
Signed-off-by: Rene van Paassen <rene.vanpaassen@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Dmitry Torokhov [Mon, 21 May 2007 04:17:57 +0000 (00:17 -0400)]
Input: aiptek - use maps in attributes
Use maps to convert for strings to internal constants and vice versa
in aiptek's sysfs attribute methods instead of open-coding it. This
results in smaller code that is also easier to maintain.
[Rene: fix a typo - stylys instead of stylus]
Signed-off-by: Rene van Paassen <rene.vanpaassen@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Dmitry Torokhov [Mon, 21 May 2007 04:17:44 +0000 (00:17 -0400)]
Input: aiptek - do not check for NULL in attribute methods
It makes no sense to check for NULL in attribute methods -
we do usb_set_intfdata before creating attributes and once
attributes have been removed we are guaranteed to not be
called.
Signed-off-by: Rene van Paassen <rene.vanpaassen@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Dmitry Torokhov [Mon, 21 May 2007 04:17:12 +0000 (00:17 -0400)]
Input: aiptek - do not try to export associated event device
Do not try to export via sysfs associated event device - it does not
work when evdev is a module that is loaded after aiptek; also it pokes
too deply into input core internals.
Userspace should rely on udev to set up permanent device name for
the tablet.
Signed-off-by: Rene van Paassen <rene.vanpaassen@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Aristeu Rozanski [Thu, 10 May 2007 05:47:18 +0000 (01:47 -0400)]
Input: psmouse - add support for Cortron PS/2 Trackballs
Cortron PS/2 Trackballs (700-0001A) report the 4th button using the 4th
bit of the first packet (yes, it breaks the standard PS/2 protocol).
This patch adds an extra protocol to generate BTN_SIDE based on the 4th
bit. There's no way to detect those trackballs using any kind of special
sequence, thus the protocol must be activated explicitely by writing
into 'protocol' sysfs attribute:
Jan Kratochvil [Wed, 9 May 2007 04:27:37 +0000 (00:27 -0400)]
Input: xpad - add support for Xbox 360 gamepad
Xbox 360 gamepad is slightly different then the previous model so it has
its own version of process_packet method. Detection of this new device
relies on USB_DEVICE_INTERFACE_PROTOCOL macro. This device got vendor
specific subclass so it can't be matched with USB_INTERFACE_INFO and
we need only one interface protocol from four availaible. It means
USB_DEVICE can't be used either.
Added xpad360_btn structure with additional buttons for x360 gamepad.
Added xtype into xpad_device structure to distinguish between different
types of xbox devices.
Signed-off-by: Jan Kratochvil <honza@jikos.cz> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Jan Kratochvil [Wed, 9 May 2007 04:26:15 +0000 (00:26 -0400)]
USB: Add USB_DEVICE_INTERFACE_PROTOCOL macro
The USB_DEVICE_INTERFACE_PROTOCOL will allow to match one interface
protocol of vendor specific device. This macro is used in patch adding
support for xbox360 to xpad.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (31 commits)
firewire: fw-sbp2: fix DMA mapping of management ORBs
firewire: fw-sbp2: fix DMA mapping of command ORBs
firewire: fw-sbp2: fix DMA mapping of S/G tables
firewire: fw-sbp2: add a boundary check
firewire: fw-sbp2: correctly align page tables
firewire: fw-sbp2: memset wants string.h
firewire: fw-sbp2: use correct speed in sbp2_agent_reset
firewire: fw-sbp2: correctly dereference by container_of
firewire: Document userspace ioctl interface.
firewire: fw-sbp2: implement nonexclusive login
firewire: fw-sbp2: let SCSI shutdown commands through before logout
firewire: fw-sbp2: implement max sectors limit for some old bridges
firewire: simplify a struct type
firewire: support S100B...S400B and link slower than PHY
firewire: optimize gap count with 1394b leaf nodes
firewire: remove unused macro
firewire: missing newline in printk
firewire: fw-sbp2: remove unused struct member
ieee1394: remove old isochronous ABI
ieee1394: sbp2: change some module parameters from int to bool
...
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: handle cases of volume knobs generating relative values
HID: Logitech keyboard 0xc311 needs reset leds quirk
HID: support for logitech cordless desktop LX500 special mapping
HID: fix autocentering of PID devices
HID: separate quirks for report descriptor fixup
HID: Add NOGET quirk for all NCR devices
HID: support for Petalynx Maxter remote control
HID: fix mismatch between hid-input HUT find/search mapping and the HUT
HID: support for Gameron dual psx adaptor
USB HID: avoid flush_scheduled_work()
HID: Use menuconfig objects
HID: force hid-input for Microsoft SideWinder GameVoice device
HID: input mapping for Chicony KU-0418 tactical pad
HID: make debugging output runtime-configurable
Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (75 commits)
Ethernet driver for EISA only SNI RM200/RM400 machines
Extract chip specific code out of lasi_82596.c
ehea: Whitespace cleanup
pasemi_mac: Fix TX interrupt threshold
spidernet: Replace literal with const
r8169: perform RX config change after mac filtering
r8169: mac address change support
r8169: display some extra debug information during startup
r8169: add endianess annotations to [RT]xDesc
r8169: align the IP header when there is no DMA constraint
r8169: add bit description for the TxPoll register
r8169: cleanup
r8169: remove the media option
r8169: small 8101 comment
r8169: confusion between hardware and IP header alignment
r8169: merge with version 8.001.00 of Realtek's r8168 driver
r8169: merge with version 6.001.00 of Realtek's r8169 driver
r8169: prettify mac_version
r8169: populate the hw_start handler for the 8110
r8169: populate the hw_start handler for the 8168
...
Stefan Richter [Mon, 2 Jul 2007 20:07:34 +0000 (22:07 +0200)]
firewire: fw-sbp2: fix DMA mapping of S/G tables
- The CPU must not touch the buffer after it was DMA-mapped.
- The size argument of dma_unmap_single(...page_table...) was bogus.
- Move a comment closer to the code to which it refers to.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Stefan Richter [Sun, 1 Jul 2007 11:56:03 +0000 (13:56 +0200)]
firewire: fw-sbp2: add a boundary check
Add rudimentary check for the case that the page table overflows due to
merging of s/g elements by the IOMMU. This would have lead to
overwriting of arbitrary memory.
After this change I expect that an offending command will be
unsuccessfully retried until the scsi_device is taken offline by SCSI
core. It's a border case and not worth to implement a recovery
strategy.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Kristian Høgsberg <krh@redhat.com>
Stefan Richter [Sun, 10 Jun 2007 19:31:36 +0000 (21:31 +0200)]
firewire: support S100B...S400B and link slower than PHY
Use a speed probe to determine the speed over 1394b buses and of nodes
which report a link speed less than their PHY speed.
Log the effective maximum speed of newly created nodes in dmesg.
Also, read the config ROM (except bus info block) at the maximum speed
rather than S100. This isn't a real optimization though because we
still only use quadlet read requests for the entire ROM.
The patch also adds support for S1600 and S3200, although such hardware
does not exist yet.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Stefan Richter [Sun, 24 Jun 2007 13:31:54 +0000 (15:31 +0200)]
ieee1394: remove old isochronous ABI
Based on patch "the scheduled removal of RAW1394_REQ_ISO_{SEND,LISTEN}"
from Adrian Bunk, November 20 2006.
This patch also removes the underlying facilities in ohci1394 and
disables them in pcilynx. That is, hpsb_host_driver.devctl() and
hpsb_host_driver.transmit_packet() are no longer used for iso reception
and transmission.
Since video1394 and dv1394 only work with ohci1394 and raw1394's rawiso
interface has never been implemented in pcilynx, pcilynx is now no
longer useful for isochronous applications.
raw1394 will still handle the request types but will complete the
requests with errors that indicate API version conflicts.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Stefan Richter [Sun, 27 May 2007 21:14:05 +0000 (23:14 +0200)]
ieee1394: eth1394: revert parent device to that in 2.6.20
After ieee1394 was converted away from class_device like the networking
subsystem was already in 2.6.21, eth1394's device may point to the
fw-host device as its parent again like in 2.6.20.
This affects userspace tools which examine the sysfs representation of
eth1394's device.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Stefan Richter [Sun, 17 Jun 2007 21:47:45 +0000 (23:47 +0200)]
ieee1394: nodemgr: parallelize between several hosts
Remove the global nodemgr_serialize mutex which enclosed most of the
host thread event loop. This allows for parallelism between several
host adapter cards.
Properly serialize the driver hooks .update(), .suspend(), .resume(),
and .remove() by means of device->sem. These hooks can be called from
outside the host threads' contexts.
Get() and put() the device.driver when calling its hooks.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Stefan Richter [Wed, 4 Jul 2007 21:13:53 +0000 (23:13 +0200)]
ieee1394: raw1394: fix a 32/64-bits compat fix
I was told that only i386 aligns 64 bit integers at 4 bytes boundaries
while all other architectures (32 bit architectures with 64 bit
siblings) align it on 8 bytes boundaries.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Stefan Richter [Mon, 21 May 2007 16:52:06 +0000 (18:52 +0200)]
ieee1394: raw1394: Add ioctl() for 32bit userland on 64bit kernel, amendment
Pointed out by Arnd Bergmann: PPC32 aligns this at 64bit, IA32 packs
it. A kernel-wide available __compat_u64 which is 4-byte aligned on
AMD64 and IA64 would be nicer though.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Petr Vandrovec [Mon, 7 May 2007 02:14:47 +0000 (04:14 +0200)]
ieee1394: raw1394: Add ioctl() for 32bit userland on 64bit kernel
Add compat_ioctl. Although all structures are more or less same,
raw1394_iso_packets got pointer inside, and raw1394_cycle_timer got unwanted
padding in the middle. I did not add any translation for ioctls passing array
of integers around as integers seem to have same size (32 bits) on all
architectures supported by Linux.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name> Acked-by: Dan Dennedy <dan@dennedy.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (split into 3 patches)
Petr Vandrovec [Mon, 7 May 2007 02:14:47 +0000 (04:14 +0200)]
ieee1394: raw1394: Fix write() for 32bit userland on 64bit kernel
* write(fd, buf, 52) from 32bit app was returning 56. Most of callers did not
care, but some (arm registration) did, and anyway it looks bad if request for
writing 52 bytes returns 56. And returning sizeof anything in 'int' is not
good as well. So all functions now return '0' instead of
sizeof(struct raw1394_request) on success, and write() itself provides correct
return value (it just returns value it was asked to write on success as raw1394
does not do any partial writes at all).
* Related to this was problem that write() could have returned 0 when kernel
state would become corrupted and moved to different state than
opened/initialized/connected. Now it returns -EBADFD which seemed appropriate.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name> Acked-by: Dan Dennedy <dan@dennedy.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (split into 3 patches)
Petr Vandrovec [Mon, 7 May 2007 02:14:47 +0000 (04:14 +0200)]
ieee1394: raw1394: Fix read() for 32bit userland on 64bit kernel
read() always failed with -EFAULT. This was happening due to
raw1394_compat_read copying data to wrong location - access_ok always
failed as 'r' is kernel address, not user. Whole function just tried to
copy data from 'r' to 'r', which is not good.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name> Acked-by: Dan Dennedy <dan@dennedy.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (split into 3 patches)
This patch allows users to override both host and device side cable detection
with "ideX=ata66" kernel parameter. Thanks to this it should be now possible
to use UDMA > 2 modes on systems (laptops mainly) which use short 40-pin cable
instead of 80-pin one.
Next patches add automatic detection of some systems using short cables.
Changes:
* Rename hwif->udma_four to hwif->cbl and make it u8.
* Convert all existing users accordingly (use ATA_CBL_* defines while at it).
* Add ATA_CBL_PATA40_SHORT support to ide-iops.c:eighty_ninty_three().
* Use ATA_CBL_PATA40_SHORT for "ideX=ata66" kernel parameter.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Reviewed-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Junio C Hamano [Mon, 9 Jul 2007 21:17:57 +0000 (23:17 +0200)]
ide_in_drive_list(): "ALL" is not a wildcard anymore
This removes the support to treat "ALL" as a wildcard for
firmware revision. This is made a separate patch, as it will
break out-of-tree ide drivers that feed its own table that uses
"ALL" as the wildcard to ide_in_drive_list().
Signed-off-by: Junio C Hamano <junkio@cox.net> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Junio C Hamano [Mon, 9 Jul 2007 21:17:56 +0000 (23:17 +0200)]
mips au1xxx_ide.h: use NULL as firmware-revision wildcard
This updates the DMA whitelist in MIPS specific au1xxx ide
driver to use NULL instead of "ALL" as the wildcard.
Signed-off-by: Junio C Hamano <junkio@cox.net> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Junio C Hamano [Mon, 9 Jul 2007 21:17:56 +0000 (23:17 +0200)]
ide_in_drive_list(): accept NULL as the wildcard for firmware revision
Earlier, the matching of (model,rev) in ide-dma black/white list
handling was to consider "ALL" in the table to match any
revision. This makes NULL to be also an accepted wildcard, and
changes the entries of tables in ide-dma.c to use NULL.
The code still accepts "ALL" as the wildcard, in order to keep
any out-of-tree ide driver that feeds its own table that uses
"ALL" as the wildcard to ide_in_drive_list() function from
breaking.
Signed-off-by: Junio C Hamano <junkio@cox.net> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Sergei Shtylyov [Mon, 9 Jul 2007 21:17:56 +0000 (23:17 +0200)]
aec62xx: remove init_dma() method (take 2)
Get rid of the init_dma() method (which had no particular reason to exist) by
folding it into the init_hwif() method. While at it, also perform some cleanup
in the latter method:
- get rid of the useless clearing of hwif->autodma;
- fold the serialization code into one 'if' statement;
- fold setting the drives' 'autotune' and 'autodma' fields into the single
statements...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Sergei Shtylyov [Mon, 9 Jul 2007 21:17:55 +0000 (23:17 +0200)]
cmd64x: init. code cleanup
Fix two minor issues with PCI0646 chip reporting in the init_chipset() method:
"IRQ workaround enabled" message printed out not only for revision 0x01 and
"CMD646: chipset revision" printed twice (by IDE core and the driver itself).
Also, remove empty/pointless switch cases for the chips other than PCI0646,
duplicate write to the MRDMODE register when enabling interrupts and MEMORY
READ LINE cycles, and needless/misplaced initialization of the timing registers
in this method.
Switch to reading only the PCI revision ID register itself, not the whole 32
bits at its address in init_chipset() and init_hwif() methods; in addition,
get rid of the useless clearing of hwif->autodma and perform some cosmetic
style changes in the latter method.
Refactor ata66_cmd64x() by moving all the code into the 'switch' statement,
renaming/adding variables, and fixing the coding style.
While at it, finally get rid of the meaningless aliasing register #define's...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Sergei Shtylyov [Mon, 9 Jul 2007 21:17:55 +0000 (23:17 +0200)]
hpt366: simplify UltraDMA filtering (take 4)
Simplify UltraDMA mode filtering in the driver:
- make use of the newly introduced 'udma_mask' field of 'ide_pci_device_t' to
set the correct hwif->ultra_mask, modifying init_setup_hpt366() to select
the correct mask based on the chip revision;
- replace 'max_mode' field of the 'struct hpt_info' with 'max_ultra' specifying
the maximum UltraDMA mode allowed;
- rewrite hpt3xx_udma_filter() to differ the filters based on the 'chip_type'
field, and only use it for HPT366 and HPT370[A] where it's really necessary.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Sergei Shtylyov [Mon, 9 Jul 2007 21:17:54 +0000 (23:17 +0200)]
ide: make void and rename ide_dma_timeout() method
Since ide_dma_timeout() method's result is discarded, make it return 'void'.
While at it, drop 'ide_' from the method's name, drop the '__' prefix from
the default method's name, and do some cleanups in this method driver-wise:
- in ide-dma.c, au1xxx-ide.c, and pdc202xx_old.c, define/use 'hwif' variable;
- in au1xxx-ide.c, get rid of commented out printk();
- in sl82c105.c, get rid of unnecessary variables.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Sergei Shtylyov [Mon, 9 Jul 2007 21:17:54 +0000 (23:17 +0200)]
ide: make void and rename ide_dma_lostirq() method
Since ide_dma_lostirq() method's result is discarded, make it return 'void'.
While at it, rename the method to dma_lost_irq(), drop the '__' prefix from the
default method's name, and do some cleanups in this method driver-wise:
- in aec62xx.c, rename the method in accordance with other drivers, and get rid
of unnecessary variables there;
- in pdc202xx_old.c, define/use 'hwif' variable;
- in sgiioc4.c, rearrange the code to call the resetproc() method directly.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Switch the driver to always program DMA/PIO timings and set device transfer
mode instead of trusting BIOS on CSB6 controllers (libata pata_serverworks.c
driver is also doing things this way and there were no problems reported so
far). While doing conversion I noticed that the old code had many issues:
* the code was assuming that hwif->dma_status is always valid
(which obviously isn't true if hwif->dma_base == NULL)
* value of "(ultra_timing >> (4*unit)) & ~(0xF0)" expression wasn't checked
to fit into udma_modes[5]
* code validating DMA timings didn't validate corresponding PIO timings
* extra CSB5 PIO register wasn't validated et all
* hwif->ide_dma_off_quietly() is always called before ide_set_dma() (which in
turn calls hwif->speedproc() method - svwks_tune_chipset() in this case)
so the code depending on DMA capable bit of DMA status to be set was never
executed (=> the code was never validating DMA timings despite actually
enabling DMA if the PIO timings were OK!)
* on resume driver dependend entirely on BIOS to restore timings and set
transfer mode on the device
While at it:
There is no need to read PIO/MWDMA timings now so don't do it.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6:
JFS: Update print_hex_dump() syntax
JFS: use print_hex_dump() rather than private dump_mem() function
JFS: Whitespace cleanup and remove some dead code
add credits for recent major scheduler contributions:
Con Kolivas, for pioneering the fair-scheduling approach
Peter Williams, for smpnice
Mike Galbraith, for interactivity tuning of CFS
Srivatsa Vaddagiri, for group scheduling enhancements
the Linux scheduler is starving a number of workloads. So default
to more agressive idle-balancing. This hurts lmbench context-switching
numbers (which was the main reason we sucked at idle-balancing for
such a long time) but the lmbench numbers are fine once the system is
minimally utilized.
do not set softirqs to nice +19. _If_ for whatever reason
we missed to process some high-prio softirq and woke up
ksoftirqd, we should give it a fair chance to actually
get some work done, even if the system is under load.
projects / linux-2.6 / log