Re: 2.6.11-rc1-mm1

[Robert Wisniewski <bob@watson.ibm.com>]

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X-Mailer: VM 6.43 under 20.4 "Emerald" XEmacs  Lucid
Message-ID: <16876.16024.551428.349980@kix.watson.ibm.com>
From: Robert Wisniewski <bob@watson.ibm.com>
Bcc: bob@watson.ibm.com,rosnbrg@watson.ibm.com

Thomas Gleixner writes:
 > On Mon, 2005-01-17 at 15:32 -0500, Karim Yaghmour wrote:
 > > You're either on crack or I don't know how to read english. Here's what
 > > you said:
 > 
 > Maybe you should read your own comment about ad-hominem attacks earlier
 > in this thread and consider if it might apply to you.
 > 
 > I know, what I have said. I said reduce the filtering to the absolute
 > minimum and do the rest in userspace.
 > 
 > The now builtin filters are defined to fit somebodys needs or idea of
 > what the user should / wants to see. They will not fit everybodys
 > needs / ideas. So we start modifying, adding and #ifdefing kernel
 > filters, which is a scary vision.
 > 
 > Enabling and disabling events is a valid basic filter request, which
 > should live in the kernel. Anything else should go into userspace, IMO.
 > 
 > tglx

I believe (and Karim can correct me if I'm wrong) the idea is to have
groups of events that can be disabled and enabled via a one word mask.  No
checking multiple variables, no #ifdefing, something very streamlined.  By
userspace I assume you mean post-processing, i.e., if the user/library/etc
needs to log events they use the same simple facility.

I think we agree to optimize/streamline performance for the gathering and
do work in the post processing.  There is an outstanding patch that makes
strides in this direction.

-bob

Robert Wisniewski
The K42 MP OS Project
http://www.research.ibm.com/K42/
bob@watson.ibm.com