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TO RESET: Add kernel argument to toggle on-demand paging for hugetlbfs map

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Change-Id: Id748e0a2afc4ea59142fedb652a15b4007c5dee4
This commit is contained in:
Masamichi Takagi
2020-12-10 15:45:58 +09:00
parent ed923ac82f
commit 3949ab65a8
3 changed files with 14 additions and 1 deletions
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2
kernel/hugefileobj.c
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@ -283,7 +283,7 @@ int hugefileobj_create(struct memobj *memobj, size_t len, off_t off,
obj->pgsize);
#ifdef ENABLE_FUGAKU_HACKS
{
if (!hugetlbfs_on_demand) {
int pgind;
int npages;

3
kernel/include/page.h
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@ -69,4 +69,7 @@ static inline int page_is_multi_mapped(struct page *page)
/* Should we take page faults on ANONYMOUS mappings? */
extern int anon_on_demand;
#ifdef ENABLE_FUGAKU_HACKS
extern int hugetlbfs_on_demand;
#endif
#endif

10
kernel/mem.c
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@ -63,6 +63,9 @@ extern int interrupt_from_user(void *);
struct tlb_flush_entry tlb_flush_vector[IHK_TLB_FLUSH_IRQ_VECTOR_SIZE];
int anon_on_demand = 0;
#ifdef ENABLE_FUGAKU_HACKS
int hugetlbfs_on_demand;
#endif
int sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
static struct ihk_mc_pa_ops *pa_ops;
@ -2041,6 +2044,13 @@ void mem_init(void)
anon_on_demand = 1;
}
#ifdef ENABLE_FUGAKU_HACKS
if (find_command_line("hugetlbfs_on_demand")) {
kprintf("Demand paging on hugetlbfs mappings enabled.\n");
hugetlbfs_on_demand = 1;
}
#endif
/* Init distance vectors */
numa_distances_init();
}