diff options
| author | Nitin Gupta <nitin.m.gupta@oracle.com> | 2017-07-19 17:12:54 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-20 12:37:09 -0700 |
| commit | 8399e4b88a93fc7bc00fff3b8da9b2e718b7f45e (patch) | |
| tree | e91c88b7d7f37071130a61311b347510ff09d6ab /arch/sparc/mm/init_64.c | |
| parent | fc290a114fc6034b0f6a5a46e2fb7d54976cf87a (diff) | |
| download | lwn-8399e4b88a93fc7bc00fff3b8da9b2e718b7f45e.tar.gz lwn-8399e4b88a93fc7bc00fff3b8da9b2e718b7f45e.zip | |
sparc64: Register hugepages during arch init
Add hstate for each supported hugepage size using
arch initcall. This change fixes some hugepage
parameter parsing inconsistencies:
case 1: no hugepage parameters
Without hugepage parameters, only a hugepages-8192kB entry is visible
in sysfs. It's different from x86_64 where both 2M and 1G hugepage
sizes are available.
case 2: default_hugepagesz=[64K|256M|2G]
When specifying only a default_hugepagesz parameter, the default
hugepage size isn't really changed and it stays at 8M. This is again
different from x86_64.
Orabug: 25869946
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/mm/init_64.c')
| -rw-r--r-- | arch/sparc/mm/init_64.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index 3c40ebd50f92..fed73f14aa49 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -325,6 +325,29 @@ static void __update_mmu_tsb_insert(struct mm_struct *mm, unsigned long tsb_inde } #ifdef CONFIG_HUGETLB_PAGE +static void __init add_huge_page_size(unsigned long size) +{ + unsigned int order; + + if (size_to_hstate(size)) + return; + + order = ilog2(size) - PAGE_SHIFT; + hugetlb_add_hstate(order); +} + +static int __init hugetlbpage_init(void) +{ + add_huge_page_size(1UL << HPAGE_64K_SHIFT); + add_huge_page_size(1UL << HPAGE_SHIFT); + add_huge_page_size(1UL << HPAGE_256MB_SHIFT); + add_huge_page_size(1UL << HPAGE_2GB_SHIFT); + + return 0; +} + +arch_initcall(hugetlbpage_init); + static int __init setup_hugepagesz(char *string) { unsigned long long hugepage_size; @@ -364,7 +387,7 @@ static int __init setup_hugepagesz(char *string) goto out; } - hugetlb_add_hstate(hugepage_shift - PAGE_SHIFT); + add_huge_page_size(hugepage_size); rc = 1; out: |