Revision 3a53396b0381ec9d5180fd8fe7a681c8ce95fd9a authored by ShuoX Liu on 28 March 2012, 22:19:11 UTC, committed by Len Brown on 30 March 2012, 05:52:58 UTC
Some C states of new CPU might be not good. One reason is BIOS might configure them incorrectly. To help developers root cause it quickly, the patch adds a new sysfs entry, so developers could disable specific C state manually. In addition, C state might have much impact on performance tuning, as it takes much time to enter/exit C states, which might delay interrupt processing. With the new debug option, developers could check if a deep C state could impact performance and how much impact it could cause. Also add this option in Documentation/cpuidle/sysfs.txt. [akpm@linux-foundation.org: check kstrtol return value] Signed-off-by: ShuoX Liu <shuox.liu@intel.com> Reviewed-by: Yanmin Zhang <yanmin_zhang@intel.com> Reviewed-and-Tested-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
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README.txt
================================
Fujitsu FR-V LINUX DOCUMENTATION
================================
This directory contains documentation for the Fujitsu FR-V CPU architecture
port of Linux.
The following documents are available:
(*) features.txt
A description of the basic features inherent in this architecture port.
(*) configuring.txt
A summary of the configuration options particular to this architecture.
(*) booting.txt
A description of how to boot the kernel image and a summary of the kernel
command line options.
(*) gdbstub.txt
A description of how to debug the kernel using GDB attached by serial
port, and a summary of the services available.
(*) mmu-layout.txt
A description of the virtual and physical memory layout used in the
MMU linux kernel, and the registers used to support it.
(*) gdbinit
An example .gdbinit file for use with GDB. It includes macros for viewing
MMU state on the FR451. See mmu-layout.txt for more information.
(*) clock.txt
A description of the CPU clock scaling interface.
(*) atomic-ops.txt
A description of how the FR-V kernel's atomic operations work.
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