sparc64: Kill unnecessary tables and increase MAX_BANKS.

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[ Upstream commit d195b71bad ]

swapper_low_pmd_dir and swapper_pud_dir are actually completely
useless and unnecessary.

We just need swapper_pg_dir[].  Naturally the other page table chunks
will be allocated on an as-needed basis.  Since the kernel actually
accesses these tables in the PAGE_OFFSET view, there is not even a TLB
locality advantage of placing them in the kernel image.

Use the hard coded vmlinux.ld.S slot for swapper_pg_dir which is
naturally page aligned.

Increase MAX_BANKS to 1024 in order to handle heavily fragmented
virtual guests.

Even with this MAX_BANKS increase, the kernel is 20K+ smaller.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

David S. Miller 2014-09-27 21:30:57 -07:00 • committed by Greg Kroah-Hartman

parent 6720e85bbd

commit 4fe9ef523b

3 changed files with 5 additions and 26 deletions

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1

arch/sparc/include/asm/pgtable_64.h

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5

arch/sparc/kernel/vmlinux.lds.S

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25

arch/sparc/mm/init_64.c

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