Hi, David Miller wrote: [Thu Sep 18 2014, 12:45:38AM EDT] > From: Bob Picco <bpicco@xxxxxxxxxx> > Date: Tue, 16 Sep 2014 12:53:24 -0400 > > > From: bob picco <bpicco@xxxxxxxxxx> > > > > This patch attempts to accomodate the coarse grain memory controller unit > > (MCU) in Niagara5 and later generations. This is achieved by having a root > > array which is array of pointers to arrays of TTE-s for vmemmap. The ktlb > > paths are patched when using the root array. > > > > Older sparc64 should have the net effect of being treated similar to before > > the introduction of Niagara5 and Athena which caused an increase in memory > > footprint of static sparc64 related memory management items. > > > > Cc: sparclinux@xxxxxxxxxxxxxxx > > Signed-off-by: Bob Picco <bob.picco@xxxxxxxxxx> > > We already have a rather nice data structure for storing sparse mappings > of the virtual address space, in the form of the Linux page tables, so > let's just use that. :-) > > This also shrinks the kernel BSS by 2MB. This looks good too! I wasn't about to make the decision for sun4u. Let me first test all three on my T5-2 local to me. Well, review some too. Then I'll hit the M7-4 again. Oh please remind me to mention percpu chunk allocator. Quickly we need need to enlarge VMALLOC space significantly but this is old data. thanx! -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
