lkml.org 
[lkml]   [2009]   [Aug]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 4/4] tracing, page-allocator: Add a postprocessing script for page-allocator-related ftrace events
From
Date
On Tue, 04 Aug 2009 13:18:18 PDT, Andrew Morton said:

> As usual, we're adding tracepoints because we feel we must add
> tracepoints, not because anyone has a need for the data which they
> gather.

One of the strong points of the Solaris 'dtrace' is that the kernel comes
pre-instrumented with zillions of tracepoints, including a lot that don't
seem to have very much application - just so they're already in place in
case you hit some weird issue and need the tracepoint for an ad-crock dtrace
script to debug something. So when I'm trying to diagnose why my backup
server suddenly got sluggish 3 terabytes into a 5 terabyte backup, and it
looks like some weird fiberchannel issue, I can collect data without having
to reboot to install a tracepoint (which would lose the backup, and possibly
reset the issue or otherwise make it go into hiding).

Just sayin'. :)
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2009-08-05 17:11    [W:0.156 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site