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From: Shivank Garg <shivankg@amd.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	David Hildenbrand <david@kernel.org>, Zi Yan <ziy@nvidia.com>,
	Matthew Brost <matthew.brost@intel.com>,
	Joshua Hahn <joshua.hahnjy@gmail.com>,
	Rakie Kim <rakie.kim@sk.com>, Byungchul Park <byungchul@sk.com>,
	Gregory Price <gourry@gourry.net>,
	Ying Huang <ying.huang@linux.alibaba.com>,
	"Alistair Popple" <apopple@nvidia.com>,
	Lorenzo Stoakes <ljs@kernel.org>,
	"Liam R. Howlett" <liam@infradead.org>,
	Vlastimil Babka <vbabka@kernel.org>,
	"Mike Rapoport" <rppt@kernel.org>,
	Suren Baghdasaryan <surenb@google.com>,
	"Michal Hocko" <mhocko@suse.com>
Cc: Karim Manaouil <kmanaouil.dev@gmail.com>,
	Frank van der Linden <fvdl@google.com>,
	Teja Vojjala <tejavojjala@google.com>,
	Pravin Tamkhane <pravintamkhane@google.com>,
	Kinsey Ho <kinseyho@google.com>, Wei Xu <weixugc@google.com>,
	Matthew Wilcox <willy@infradead.org>,
	Davidlohr Bueso <dave@stgolabs.net>,
	Vinod Koul <vkoul@kernel.org>, Bharata B Rao <bharata@amd.com>,
	SeongJae Park <sj@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Xuezheng Chu <xuezhengchu@huawei.com>,
	"Yiannis Nikolakopoulos" <yiannis@zptcorp.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	John Hubbard <jhubbard@nvidia.com>, Peter Xu <peterx@redhat.com>,
	Rik van Riel <riel@surriel.com>,
	Shakeel Butt <shakeel.butt@linux.dev>, Tejun Heo <tj@kernel.org>,
	Fan Ni <nifan.cxl@gmail.com>, Jonathan Cameron <jic23@kernel.org>,
	Aneesh Kumar K.V <aneesh.kumar@kernel.org>,
	Nathan Lynch <nathan.lynch@amd.com>, Frank Li <Frank.li@nxp.com>,
	Dan Williams <djbw@kernel.org>, <linux-mm@kvack.org>,
	<linux-kernel@vger.kernel.org>, Shivank Garg <shivankg@amd.com>
Subject: [PATCH RFC v6 5/5] mm/migrate: adjust NR_MAX_BATCHED_MIGRATION for testing
Date: Tue, 30 Jun 2026 07:28:41 +0000	[thread overview]
Message-ID: <20260630-shivank-batch-migrate-offload-v6-5-da95d7e8b8a2@amd.com> (raw)
In-Reply-To: <20260630-shivank-batch-migrate-offload-v6-0-da95d7e8b8a2@amd.com>

From: Zi Yan <ziy@nvidia.com>

Change NR_MAX_BATCHED_MIGRATION to HPAGE_PUD_NR to allow batching THP
copies.

These are for testing purpose only.

Signed-off-by: Zi Yan <ziy@nvidia.com>
Signed-off-by: Shivank Garg <shivankg@amd.com>
---
 mm/migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 4fed3110ca0a..4be1f3dc1603 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1592,7 +1592,7 @@ static inline int try_split_folio(struct folio *folio, struct list_head *split_f
 }
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-#define NR_MAX_BATCHED_MIGRATION	HPAGE_PMD_NR
+#define NR_MAX_BATCHED_MIGRATION	HPAGE_PUD_NR
 #else
 #define NR_MAX_BATCHED_MIGRATION	512
 #endif

-- 
2.43.0


  parent reply	other threads:[~2026-06-30  7:29 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-30  7:28 [PATCH RFC v6 0/5] Accelerate page migration with batch copying and hardware offload Shivank Garg
2026-06-30  7:28 ` [PATCH RFC v6 1/5] mm/migrate: skip data copy for already-copied folios Shivank Garg
2026-06-30  7:28 ` [PATCH RFC v6 2/5] mm/migrate: add batch-copy path in migrate_pages_batch Shivank Garg
2026-06-30  7:28 ` [PATCH RFC v6 3/5] mm/migrate: add copy offload registration infrastructure Shivank Garg
2026-07-20 11:19   ` Huang, Ying
2026-07-20 14:44     ` Zi Yan
2026-07-20 15:32       ` Garg, Shivank
2026-07-20 15:45         ` Zi Yan
2026-07-21 11:32       ` Huang, Ying
2026-06-30  7:28 ` [PATCH RFC v6 4/5] drivers/migrate_offload: add DMA batch copy driver (dcbm) Shivank Garg
2026-06-30  7:28 ` Shivank Garg [this message]
2026-07-14 11:29 ` [PATCH RFC v6 0/5] Accelerate page migration with batch copying and hardware offload Huang, Ying

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