[Review] Remove procfs dependency of truss
howard0su at gmail.com
Wed Apr 4 11:30:29 UTC 2007
On 4/4/07, Alfred Perlstein <alfred at freebsd.org> wrote:
> * Howard Su <howard0su at gmail.com> [070404 01:20] wrote:
> > Following the suggestion in idea page, I proposed the attached patch.
> > I didn't change any kernel part because I think PTRACE(2) is
> > functional although man page didn't document it.
> > I tested the patch under i386 and amd64 box. The help on testing and
> > code review will be appreciated.
> wow, well done! any draw backs to using ptrace over procfs?
I didn't see.
> have you tested performance?
Not yet. Base on the number of kernel syscall, new implementaion keep
in a same level. However ptrace calls has a short code path compare to
generic read syscall. I suppose there will be some improvement.
Anyway, I will try to get perf data.
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