[uml-devel] Re: Valgrind meets UML

[Giovanni Marzot <gmarzot@nortelnetworks.com>]

Hi,

I see this email below...

Can anyone confirm if the patches to valgrind mentioned below have found 
there way into the release?

I will be attempting this with 2.4.20-6um.

Any words of wisdom appreciated. Has anyone used this combination 
succesfully?

I wonder what "teaching valgrind about the false positives" entails.

thanks for any info, GSM

 >bulb@ucw.cz said:
 >> Is it possible to run 2.4.20-3um (or -4um - I have not got around to
 >> updating yet) under valgrind?
 >>
 >> Does it need some specific config options to work?
 >
 >Any recent UML is as valgrindable as the UML mentioned in the post you 
 >saw.
 >
 >You need CONFIG_MODE_SKAS, !CONFIG_MODE_TT, and 
 >CONFIG_KERNEL_STACK_ORDER=3.
 >
 >You also probably need some valgrind patches unless the stuff I and 
 >Jeremy
 >have done have been merged into valgrind CVS.
 >
 >Once valgrind is working, you need to go through the false positives and
 >teach valgrind about how the kernel deals with memory allocation.  This is
 >the point at which I stopped.




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