From: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
To: linux-mm@kvack.org
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <chleroy@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Chris Li <chrisl@kernel.org>, Kairui Song <kasong@tencent.com>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Nhat Pham <nphamcs@gmail.com>, Baoquan He <baoquan.he@linux.dev>,
Barry Song <baohua@kernel.org>,
Youngjun Park <youngjun.park@lge.com>,
David Hildenbrand <david@kernel.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Sayali Patil <sayalip@linux.ibm.com>,
"Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Subject: [RFC 4/4] powerpc: Kconfig: Enable THP_SWAP on Book3S64
Date: Tue, 9 Jun 2026 18:49:34 +0530 [thread overview]
Message-ID: <2eed2ccf40bd017cc55459523bb18c110b907bbf.1781000840.git.ritesh.list@gmail.com> (raw)
In-Reply-To: <cover.1781000840.git.ritesh.list@gmail.com>
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
prev parent reply other threads:[~2026-06-09 13:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-09 13:19 [RFC 0/4] mm, swap: Enable THP SWAP for PowerPC Book3S64 Ritesh Harjani (IBM)
2026-06-09 13:19 ` [RFC 1/4] include/linux/swap.h: Remove unused leftovers Ritesh Harjani (IBM)
2026-06-09 13:19 ` [RFC 2/4] mm, swap: make SWAPFILE_CLUSTER runtime Ritesh Harjani (IBM)
2026-06-09 13:19 ` [RFC 3/4] mm, swap: make SWAP_NR_ORDERS runtime Ritesh Harjani (IBM)
2026-06-09 13:19 ` Ritesh Harjani (IBM) [this message]
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