Le 01/06/2017 à 16:30, Aneesh Kumar K.V a écrit :
With commit aa888a74977a8 ("hugetlb: support larger than MAX_ORDER") we added
support for allocating gigantic hugepages via kernel command line. Switch
ppc64 arch specific code to use that.
Is it only ppc64 ? Your patch removes things defined for the 8xx and
modifies stuff in init_32.c
On the 8xx, as far as I remember, 8M pages on 4k pages mode are above
default MAX_ORDER, I solved it by increasing MAX_ORDER. Is that wrong ?
W.r.t FSL support, we now limit our allocation range using
BOOTMEM_ALLOC_ACCESSIBLE.
We use the kernel command line to do reservation of hugetlb pages on powernv
platforms. On pseries hash mmu mode the supported gigantic huge page size is
16GB and that can only be allocated with hypervisor assist. For pseries the
command line option doesn't do the allocation. Instead pseries does gigantic
hugepage allocation based on hypervisor hint that is specified via
"ibm,expected#pages" property of the memory node.
Cc: Scott Wood <o...@buserror.net>
Cc: Christophe Leroy <christophe.le...@c-s.fr>
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 +-
arch/powerpc/include/asm/hugetlb.h | 14 --
arch/powerpc/kernel/setup-common.c | 7 -
arch/powerpc/mm/hash_utils_64.c | 2 +-
arch/powerpc/mm/hugetlbpage.c | 177 +++-----------------------
arch/powerpc/mm/init_32.c | 2 -
6 files changed, 22 insertions(+), 182 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index 6981a52b3887..67766e60a6b6 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
@@ -468,7 +468,7 @@ extern int htab_bolt_mapping(unsigned long vstart, unsigned
long vend,
int psize, int ssize);
int htab_remove_mapping(unsigned long vstart, unsigned long vend,
int psize, int ssize);
-extern void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages);
+extern void pSeries_add_gpage(u64 addr, u64 page_size, unsigned long
number_of_pages);
Linux kernel coding style says 'mixed-case names are frowned upon'
Christophe
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