> Yes, you can't DMA to VDSO VMA I don't think.

Why not?  It's just RAM... I agree it's not a sensible thing to do though.

 > > It seems that in kernel 2.6.20-rc5 the last VMA which has a read 
 > > permission is the [vdso] section but when i try
 > > to register it i get a failure.

What's the failure?

 - R.
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