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(parent: 0dd5b7b) | patch
sparc64: Use kernel page tables for vmemmap.
authorDavid S. Miller <davem@davemloft.net>
Thu, 25 Sep 2014 04:20:14 +0000 (21:20 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sun, 5 Oct 2014 23:53:39 +0000 (16:53 -0700)
commitc06240c7f5c39c83dfd7849c0770775562441b96
treece4deb5dadaea70c75d3f6680495055f16efb9c3tree | snapshot (tar.gz zip)
parent0dd5b7b09e13dae32869371e08e1048349fd040ccommit | diff
sparc64: Use kernel page tables for vmemmap.

For sparse memory configurations, the vmemmap array behaves terribly
and it takes up an inordinate amount of space in the BSS section of
the kernel image unconditionally.

Just build huge PMDs and look them up just like we do for TLB misses
in the vmalloc area.

Kernel BSS shrinks by about 2MB.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Bob Picco <bob.picco@oracle.com>
arch/sparc/kernel/ktlb.S diff | blob | blame | history
arch/sparc/mm/init_64.c diff | blob | blame | history
arch/sparc/mm/init_64.h diff | blob | blame | history