[RFC 4/4] powerpc: Kconfig: Enable THP_SWAP on Book3S64
From: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Date: 2026-06-09 13:20:23
Also in:
linux-mm, lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
This enables THP_SWAP support for Book3S64. The performance testing of this patch series on Book3S64 with zram has shown around 40-50% improvement in case of Radix. We will be doing some performance testing on Hash too and will soon update the results. Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> --- arch/powerpc/platforms/Kconfig.cputype | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index bac02c83bb3e..48f74bd22343 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype@@ -113,6 +113,7 @@ config PPC_THP select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE + select ARCH_WANTS_THP_SWAP if TRANSPARENT_HUGEPAGE choice prompt "CPU selection" --
2.39.5