Christoph Lameter wrote on Thursday, October 12, 2006 5:33 PM > IA64: Variable Kernel Page size support > > This patch adds the capability to manage pages of varying sizes for the > kernel in region 7. This is done by setting special bits in bits 54 to 60. > > 54-59 Page size. > > If set then the default pagesize of region 7 is overridden on a fault > and a TLB of the requested size is inserted. This may be used to > manually control the coverage of a single TLB. A macro SET_TLB_SIZE > is provide that can be used upon a kernel address to encode the > desired page size. Code must refer to the address range through > this address in order to get the desired TLB size. > > 60 Page table enable. This is just getting better and better :-)) nifty! > If set then a lookup is performed using the region7_pgdir table. > That table is segmented into 8 section for the varying page > sizes supported. What is the reason to anchor these 8 sections with pgdir? Can't we just extract page size directly from the virtual address? Chop off bit 54 - 60, that's the physical address, whola. I don't see why it can't be done. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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