Re: kallsyms 2.6.8 address ordering

[jmerkey]

Robin,

I am looking over the link.  I can get around this (and already have) with 2.6.7 and 2.6.8 by instrumenting a search routine that deals with the out of order conditions.  I appreciate the 
helpful and informative response.

Jeff


> On Thu, Aug 19, 2004 at 06:10:25PM +0000, jmerkey@xxxxxxxxxxx wrote:
> > I've noticed that LKML of late is unresponsive to a lot bug posts and
> > that email is being blocked for a lot of folks.  It smells like partisan
> > politics based on economic motivations and its not really "open" any
> > more when people stoop to this level of behavior.  That aside:
> 
> I attribute this to people being over busy right now.
> 
> > kallsyms in 2.6.8 is presenting module symbol tables with out of order
> > addresses in 2.6.X.  This makes maintaining a commercial kernel debugger
> > for Linux 2.6 kernels nighmareish.  Also, the need to kmalloc name strings
> > (like kdb does) from kallsyms in kdbsupport.c while IN THE DEBUGGER makes
> > it impossible to debug large portions of the kernel code with kdb, so I
> > have rewritten large sections of kallsyms.c to handle all these broken,
> > brain-dead cases in mdb and I am not relying much on kdb hooks anymore.
> > Why on earth does Linux need to have shifting tables of test strings
> > for module names requiring all this complexity in the symbol tables
> > and kallsyms.
> 
> It must be useful for people using small memory footprint machines.
> Check with the folks doing embedded stuff.
> 
> I remember a discussion about kallsyms and scaling problems with
> top reading some /proc/<pid> file.
> 
> Look at this:
> http://marc.theaimsgroup.com/?l=linux-kernel&m=108758995727517&w=2
> 
> > I don't expect a response so I'll keep coding around the broken Linux
> > 2.6 code but I wanted to post a record of this so perhaps someone will
> > think about over-engineering systems which should be left alone.
> > 
> > Jeff
> 
> Good Luck,
> Robin Holt
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