Hi Ben, On Fri, Sep 17, 2010 at 07:52:31AM +1000, Benjamin Herrenschmidt wrote: > On Thu, 2010-09-16 at 17:38 +0530, Ankita Garg wrote: > > Thanks Ben for taking a look at this. So I checked the rtas messages > > on > > the serial console and see the following: > > > > instantiating rtas at 0x000000000f632000... done > > > > Which does not correspond to the higher addresses that I see as > > reserved > > (observation on a 16G machine). > > Well, I'd suggest you audit prom_init.c which builds the reserve map, > and the various memblock_reserve() calls in prom.c > I studied and instrumented memblock_reserve() and also reserve_mem(). However, all the reserved addresses seem to correspond to lower memory. I also observed that these reserved addresses are accessed quite rapidly when a workload is being run.. -- Regards, Ankita Garg (ankita@xxxxxxxxxx) Linux Technology Center IBM India Systems & Technology Labs, Bangalore, India -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>