x86, bts: base in-kernel ds interface on handles

Browse source

Impact: generalize the DS code to shared buffers

Change the in-kernel ds.h interface to identify the tracer via a
handle returned on ds_request_~().

Tracers used to be identified via their task_struct.

The changes are required to allow DS to be shared between different
tasks, which is needed for perfmon2 and for ftrace.

For ptrace, the handle is stored in the traced task's task_struct.
This should probably go into a (arch-specific) ptrace context some
time.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Markus Metzger 2008-11-25 09:01:25 +01:00 • committed by Ingo Molnar

parent 7d55718b0c

commit ca0002a179

4 changed files with 446 additions and 439 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

124

arch/x86/include/asm/ds.h

View file

717

arch/x86/kernel/ds.c

View file

73

arch/x86/kernel/ptrace.c

View file

9

include/linux/sched.h

View file