Re: 2.6.17-rc5-mm1


* Martin J. Bligh <mbligh@xxxxxxxxxx> wrote:

Grrr. Humpf. I can't see the option being turned on for lockdep ...
what was the config option, and is it enabled by default?

In the -mm1 patch:

config DEBUG_MUTEXES
- bool "Mutex debugging, deadlock detection"
- default n
+ bool "Mutex debugging, basic checks"
+ default y

Please don't do thatas a default.

but ... i fixed the performance problem that caused the previous
DEBUG_MUTEXES scalability problems. (there's no global mutex list
anymore) We also default to e.g. DEBUG_SLAB which is alot more costly.

It fucks up all the performance checking ;-(

i'm wondering, why doesnt your config have DEBUG_MUTEXES disabled? Then
'make oldconfig' would pick it up automatically.

Ingo
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