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graceful fallback for huge page allocation on Linux

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This commit is contained in:
daan 2019-08-26 13:47:52 -07:00
parent f0a12699c2
commit eea093000a
1 changed files with 7 additions and 0 deletions
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7
src/os.c
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@ -369,6 +369,13 @@ static void* mi_unix_mmap(void* addr, size_t size, size_t try_alignment, int pro
if (large_only || lflags != flags) {
// try large OS page allocation
p = mi_unix_mmapx(addr, size, try_alignment, protect_flags, lflags, lfd);
#ifdef MAP_HUGE_1GB
if (p == NULL && (lflags & MAP_HUGE_1GB) != 0) {
_mi_warning_message("unable to allocate huge (1GiB) page, trying large (2MiB) pages instead (error %i)\n", errno);
lflags = ((lflags & ~MAP_HUGE_1GB) | MAP_HUGE_2MB);
p = mi_unix_mmapx(addr, size, try_alignment, protect_flags, lflags, lfd);
}
#endif
if (large_only) return p;
if (p == NULL) {
mi_atomic_write(&large_page_try_ok, 10); // on error, don't try again for the next N allocations