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prctl: Add support for PR_SET_THP_DISABLE and PR_GET_THP_DISABLE

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Change-Id: I04c5568a9eb78bcac632b734f34bba49cf602c4d
Refs: #1181
This commit is contained in:
Ken Sato
2018-12-12 15:41:32 +09:00
committed by Masamichi Takagi
parent eb184419ea
commit dfd23c3ebe
24 changed files with 773 additions and 1 deletions
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6
kernel/syscall.c
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@@ -1658,7 +1658,8 @@ do_mmap(const uintptr_t addr0, const size_t len0, const int prot,
pgshift = (flags >> MAP_HUGE_SHIFT) & 0x3F;
p2align = pgshift - PAGE_SHIFT;
}
else if ((flags & MAP_PRIVATE) && (flags & MAP_ANONYMOUS)) {
else if ((flags & MAP_PRIVATE) && (flags & MAP_ANONYMOUS)
&& !proc->thp_disable) {
pgshift = 0; /* transparent huge page */
p2align = PAGE_P2ALIGN;
@@ -5198,7 +5199,10 @@ int do_shmget(const key_t key, const size_t size, const int shmflg)
if (shmflg & SHM_HUGETLB) {
pgshift = (shmflg >> SHM_HUGE_SHIFT) & 0x3F;
} else if (proc->thp_disable) {
pgshift = PAGE_SHIFT;
} else {
/* transparent huge page */
size_t pgsize;
int p2align;