Revision 9d514262425691dddf942edea8bc9919e66fe140 authored by Wanpeng Li on 13 May 2015, 06:01:03 UTC, committed by Ingo Molnar on 19 June 2015, 08:06:46 UTC
This patch adds a check that prevents futile attempts to move DL tasks to a CPU with active tasks of equal or earlier deadline. The same behavior as commit 80e3d87b2c55 ("sched/rt: Reduce rq lock contention by eliminating locking of non-feasible target") for rt class. Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Juri Lelli <juri.lelli@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1431496867-4194-3-git-send-email-wanpeng.li@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Kconfig
#
# UWB device configuration
#
menuconfig UWB
tristate "Ultra Wideband devices"
default n
help
UWB is a high-bandwidth, low-power, point-to-point radio
technology using a wide spectrum (3.1-10.6GHz). It is
optimized for in-room use (480Mbps at 2 meters, 110Mbps at
10m). It serves as the transport layer for other protocols,
such as Wireless USB (WUSB).
The topology is peer to peer; however, higher level
protocols (such as WUSB) might impose a master/slave
relationship.
Say Y here if your computer has UWB radio controllers (USB or PCI)
based. You will need to enable the radio controllers
below. It is ok to select all of them, no harm done.
For more help check the UWB and WUSB related files in
<file:Documentation/usb/>.
To compile the UWB stack as a module, choose M here.
if UWB
config UWB_HWA
tristate "UWB Radio Control driver for WUSB-compliant USB dongles (HWA)"
depends on USB
help
This driver enables the radio controller for HWA USB
devices. HWA stands for Host Wire Adapter, and it is a UWB
Radio Controller connected to your system via USB. Most of
them come with a Wireless USB host controller also.
To compile this driver select Y (built in) or M (module). It
is safe to select any even if you do not have the hardware.
config UWB_WHCI
tristate "UWB Radio Control driver for WHCI-compliant cards"
depends on PCI
help
This driver enables the radio controller for WHCI cards.
WHCI is a specification developed by Intel
(http://www.intel.com/technology/comms/wusb/whci.htm) much
in the spirit of USB's EHCI, but for UWB and Wireless USB
radio/host controllers connected via memory mapping (eg:
PCI). Most of these cards come also with a Wireless USB host
controller.
To compile this driver select Y (built in) or M (module). It
is safe to select any even if you do not have the hardware.
config UWB_I1480U
tristate "Support for Intel Wireless UWB Link 1480 HWA"
depends on UWB_HWA
select FW_LOADER
help
This driver enables support for the i1480 when connected via
USB. It consists of a firmware uploader that will enable it
to behave as an HWA device.
To compile this driver select Y (built in) or M (module). It
is safe to select any even if you do not have the hardware.
endif # UWB
![swh spinner](/static/img/swh-spinner.gif)
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