ELF Tunables (The GNU C Library)

### 39.8 ELF Tunables ¶

Tunable: glibc.elf.thp ¶

  This tunable controls Transparent Huge Page (THP) aware alignment of ELF loadable segments.

  The default value is `0`, which preserves the traditional page-sized alignment for loadable segments.

  If set to `1`, glibc will attempt to align sufficiently large `PT_LOAD` segments to the PMD huge page size when mapping them with `mmap`. This increases the likelihood that the kernel can back these mappings with Transparent Huge Pages.

  This tunable has an effect only on systems that support Transparent Huge Pages (currently Linux). On other systems, or if THP is disabled at the kernel level, enabling this tunable has no effect.