exec: reduce L2_PAGE_SIZE
With the single exception of ppc with 16M pages, we get the same number of levels with L2_PAGE_SIZE = 10 as with L2_PAGE_SIZE = 9. by doing this we reduce memory footprint of a single level in the node memory map by 2x without runtime overhead. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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exec.c
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exec.c
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@ -96,7 +96,7 @@ struct PhysPageEntry {
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/* Size of the L2 (and L3, etc) page tables. */
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/* Size of the L2 (and L3, etc) page tables. */
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#define ADDR_SPACE_BITS 64
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#define ADDR_SPACE_BITS 64
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#define P_L2_BITS 10
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#define P_L2_BITS 9
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#define P_L2_SIZE (1 << P_L2_BITS)
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#define P_L2_SIZE (1 << P_L2_BITS)
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#define P_L2_LEVELS (((ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / P_L2_BITS) + 1)
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#define P_L2_LEVELS (((ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / P_L2_BITS) + 1)
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