Re: PI patch against 2.6.16-rt9

Ingo Molnar
2006-03-28T21:05:22Z

* Esben Nielsen <simlo@phys.au.dk> wrote:

> My girl friend will be angry for me not being to bed yet, but I had to
> steal time to make this patch. I hope I managed to send it without
> white-space damage or anything like it.

thanks - this looks fine to me, but i'm still worried about the
nonatomic chain boosting side-effects that i outlined in the previous
mail.

the tempting property of your patch is the fundamental reschedulability
of the boosting itself - and the resulting simplicity of locking. On the
con side, i dont see how we can detect deadlocks reliably, nor how we
can avoid 'incorrect boosting' (outlined in the previous mail), if the
chain gets 'broken'.

Ingo