diff options
| author | Frank van der Linden <fvdl@google.com> | 2025-02-28 18:29:16 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-03-16 22:06:28 -0700 |
| commit | d58b2498200724e4f8c12d71a5953da03c8c8bdf (patch) | |
| tree | 1f9cbc97fc2632b093a3b407ee43a0e2074db799 /mm/hugetlb.c | |
| parent | 9eb6207b7812cee13431831c9661d21b53f3e93f (diff) | |
mm/hugetlb: deal with multiple calls to hugetlb_bootmem_alloc
Architectures that want pre-HVO of hugetlb vmemmap pages will need to call
hugetlb_bootmem_alloc from an earlier spot in boot (before sparse_init).
To facilitate some architectures doing this, protect hugetlb_bootmem_alloc
against multiple calls.
Also provide a helper function to check if it's been called, so that the
early HVO code, to be added later, can see if there is anything to do.
Link: https://lkml.kernel.org/r/20250228182928.2645936-16-fvdl@google.com
Signed-off-by: Frank van der Linden <fvdl@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index e4bf06f13178..826af96455aa 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4918,16 +4918,28 @@ static int __init default_hugepagesz_setup(char *s) } hugetlb_early_param("default_hugepagesz", default_hugepagesz_setup); +static bool __hugetlb_bootmem_allocated __initdata; + +bool __init hugetlb_bootmem_allocated(void) +{ + return __hugetlb_bootmem_allocated; +} + void __init hugetlb_bootmem_alloc(void) { struct hstate *h; + if (__hugetlb_bootmem_allocated) + return; + hugetlb_parse_params(); for_each_hstate(h) { if (hstate_is_gigantic(h)) hugetlb_hstate_alloc_pages(h); } + + __hugetlb_bootmem_allocated = true; } static unsigned int allowed_mems_nr(struct hstate *h) |