Commit 86590e52 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
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powerpc/mm/book3s64: Skip 16G page reservation with radix 



With hash translation, the hypervisor can hint the LPAR about 16GB contiguous range
via ibm,expected#pages. The kernel marks the range specified in the device tree
as reserved. Avoid doing this when using radix translation. Radix translation
only supports 1G gigantic hugepage and kernel can do the 1G gigantic hugepage
allocation via early memblock reservation. This can be done because with radix
translation pages are not required to be contiguous on the host.

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200622064019.16682-1-aneesh.kumar@linux.ibm.com
parent 548ad77d

arch/powerpc/mm/book3s64/hash_utils.c

+1 −1
Original line number Diff line number Diff line
@@ -596,7 +596,7 @@ static void __init htab_scan_page_sizes(void) 
	}



#ifdef CONFIG_HUGETLB_PAGE

	if (!hugetlb_disabled) {

	if (!hugetlb_disabled && !early_radix_enabled() ) {

		/* Reserve 16G huge page memory sections for huge pages */

		of_scan_flat_dt(htab_dt_scan_hugepage_blocks, NULL);

	}