linux.git/arch/powerpc/kernel/process.c, branch v2.6.17

[PATCH] unexport get_wchan

2006-03-31T20:19:01+00:00

The only user of get_wchan is the proc fs - and proc can't be built modular.

Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] powerpc: export validate_sp for oprofile calltrace

2006-03-28T05:19:52+00:00

Export validate_sp so we can use it in the oprofile calltrace code.

Signed-off-by: Anton Blanchard 
Signed-off-by: Paul Mackerras

[PATCH] powerpc: declare arch syscalls in

2006-03-27T03:48:22+00:00

powerpc currently declares some of its own system calls
in , but not all of them. That place also
contains remainders of the now almost unused kernel syscall
hack.

 - Add a new  with clean declarations
 - Include that file from every source that implements one
   of these
 - Get rid of old declarations in 

This patch is required as a base for implementing system
calls from an SPU, but also makes sense as a general
cleanup.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[PATCH] powerpc: fix various sparse warnings

2006-03-27T03:48:08+00:00

Signed-off-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

[PATCH] kretprobe instance recycled by parent process

2006-03-26T16:57:04+00:00

When kretprobe probes the schedule() function, if the probed process exits
then schedule() will never return, so some kretprobe instances will never
be recycled.

In this patch the parent process will recycle retprobe instances of the
probed function and there will be no memory leak of kretprobe instances.

Signed-off-by: bibo mao 
Cc: Masami Hiramatsu 
Cc: Prasanna S Panchamukhi 
Cc: Ananth N Mavinakayanahalli 
Cc: Anil S Keshavamurthy 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

powerpc: Implement accurate task and CPU time accounting

2006-02-24T03:05:56+00:00

This implements accurate task and cpu time accounting for 64-bit
powerpc kernels.  Instead of accounting a whole jiffy of time to a
task on a timer interrupt because that task happened to be running at
the time, we now account time in units of timebase ticks according to
the actual time spent by the task in user mode and kernel mode.  We
also count the time spent processing hardware and software interrupts
accurately.  This is conditional on CONFIG_VIRT_CPU_ACCOUNTING.  If
that is not set, we do tick-based approximate accounting as before.

To get this accurate information, we read either the PURR (processor
utilization of resources register) on POWER5 machines, or the timebase
on other machines on

* each entry to the kernel from usermode
* each exit to usermode
* transitions between process context, hard irq context and soft irq
  context in kernel mode
* context switches.

On POWER5 systems with shared-processor logical partitioning we also
read both the PURR and the timebase at each timer interrupt and
context switch in order to determine how much time has been taken by
the hypervisor to run other partitions ("steal" time).  Unfortunately,
since we need values of the PURR on both threads at the same time to
accurately calculate the steal time, and since we can only calculate
steal time on a per-core basis, the apportioning of the steal time
between idle time (time which we ceded to the hypervisor in the idle
loop) and actual stolen time is somewhat approximate at the moment.

This is all based quite heavily on what s390 does, and it uses the
generic interfaces that were added by the s390 developers,
i.e. account_system_time(), account_user_time(), etc.

This patch doesn't add any new interfaces between the kernel and
userspace, and doesn't change the units in which time is reported to
userspace by things such as /proc/stat, /proc//stat, getrusage(),
times(), etc.  Internally the various task and cpu times are stored in
timebase units, but they are converted to USER_HZ units (1/100th of a
second) when reported to userspace.  Some precision is therefore lost
but there should not be any accumulating error, since the internal
accumulation is at full precision.

Signed-off-by: Paul Mackerras

Merge ../powerpc-merge

2006-02-24T03:05:47+00:00

[PATCH] powerpc: Fix runlatch performance issues

2006-02-24T00:36:31+00:00

The runlatch SPR can take a lot of time to write. My original runlatch
code would set it on every exception entry even though most of the time
this was not required. It would also continually set it in the idle
loop, which is an issue on an SMT capable processor.

Now we cache the runlatch value in a threadinfo bit, and only check for
it in decrementer and hardware interrupt exceptions as well as the idle
loop. Boot on POWER3, POWER5 and iseries, and compile tested on pmac32.

Signed-off-by: Anton Blanchard 
Signed-off-by: Paul Mackerras

[PATCH] powerpc: trivial: modify comments to refer to new location of files

2006-02-10T05:53:51+00:00

This patch removes all self references and fixes references to files
in the now defunct arch/ppc64 tree.  I think this accomplises
everything wanted, though there might be a few references I missed.

Signed-off-by: Jon Mason 
Signed-off-by: Paul Mackerras

Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge

2006-01-12T18:21:22+00:00

Fix up delete/modify conflict of arch/ppc/kernel/process.c by hand (it's
gone, gone, gone).

Signed-off-by: Linus Torvalds