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disable transparent huge pages for a process too if the allow_large_os_pages option is set to false

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Daan 2024-04-20 16:37:09 -07:00
parent e46c1145a5
commit 79ab7c63d7
1 changed files with 14 additions and 7 deletions
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21
src/prim/unix/prim.c
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@ -148,13 +148,20 @@ void _mi_prim_mem_init( mi_os_mem_config_t* config )
config->has_virtual_reserve = true; // todo: check if this true for NetBSD? (for anonymous mmap with PROT_NONE)
// disable transparent huge pages for this process?
#if defined(MI_NO_THP) && (defined(__linux__) || defined(__ANDROID__))
int val = 0;
if (prctl(PR_GET_THP_DISABLE, &val, 0, 0, 0) != 0) {
// Most likely since distros often come with always/madvise settings.
val = 1;
// Disabling only for mimalloc process rather than touching system wide settings
(void)prctl(PR_SET_THP_DISABLE, &val, 0, 0, 0);
#if (defined(__linux__) || defined(__ANDROID__)) && defined(PR_GET_THP_DISABLE)
#if defined(MI_NO_THP)
if (true)
#else
if (!mi_option_is_enabled(mi_option_allow_large_os_pages)) // disable THP also if large OS pages are not allowed in the options
#endif
{
int val = 0;
if (prctl(PR_GET_THP_DISABLE, &val, 0, 0, 0) != 0) {
// Most likely since distros often come with always/madvise settings.
val = 1;
// Disabling only for mimalloc process rather than touching system wide settings
(void)prctl(PR_SET_THP_DISABLE, &val, 0, 0, 0);
}
}
#endif
}