From: Karim Manaouil <kmanaouil.dev@gmail.com>
To: Shivank Garg <shivankg@amd.com>
Cc: akpm@linux-foundation.org, david@kernel.org, kinseyho@google.com,
weixugc@google.com, ljs@kernel.org, Liam.Howlett@oracle.com,
vbabka@kernel.org, willy@infradead.org, rppt@kernel.org,
surenb@google.com, mhocko@suse.com, ziy@nvidia.com,
matthew.brost@intel.com, joshua.hahnjy@gmail.com,
rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net,
ying.huang@linux.alibaba.com, apopple@nvidia.com,
dave@stgolabs.net, Jonathan.Cameron@huawei.com, rkodsara@amd.com,
vkoul@kernel.org, bharata@amd.com, sj@kernel.org,
rientjes@google.com, xuezhengchu@huawei.com, yiannis@zptcorp.com,
dave.hansen@intel.com, hannes@cmpxchg.org, jhubbard@nvidia.com,
peterx@redhat.com, riel@surriel.com, shakeel.butt@linux.dev,
stalexan@redhat.com, tj@kernel.org, nifan.cxl@gmail.com,
jic23@kernel.org, aneesh.kumar@kernel.org, nathan.lynch@amd.com,
Frank.li@nxp.com, djbw@kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH 6/7] drivers/migrate_offload: add DMA batch copy driver (dcbm)
Date: Fri, 19 Jun 2026 17:32:01 +0100 [thread overview]
Message-ID: <20260619163201.ldbjaqcphke3fcvg@wrangler> (raw)
In-Reply-To: <20260619160725.lfcxrbj5go67qy6u@wrangler>
On Fri, Jun 19, 2026 at 05:07:25PM +0100, Karim Manaouil wrote:
> Btw, waiting for an interrupt adds massive scheduling overhead. If we
> also add the logic above, it'll get even worse. In my measurements, this
> can easily add up to 6ms, by which CPU page copy have easily completed
> the entire copy, which again adds to the list of latency concerns I
> raised in my other reply.
Sorry, I meant 6us.
--
~karim
next prev parent reply other threads:[~2026-06-19 16:32 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-28 15:50 [PATCH 0/7] Accelerate page migration with batch copying and hardware offload Shivank Garg
2026-04-28 15:50 ` [PATCH 1/7] mm/migrate: rename PAGE_ migration flags to FOLIO_ Shivank Garg
2026-04-30 9:07 ` Huang, Ying
2026-05-18 16:54 ` Jonathan Cameron
2026-05-18 23:51 ` Zi Yan
2026-06-09 5:34 ` Dev Jain
2026-06-09 6:17 ` Garg, Shivank
2026-06-09 6:23 ` Dev Jain
2026-04-28 15:50 ` [PATCH 2/7] mm/migrate: use migrate_info field instead of private Shivank Garg
2026-05-07 9:43 ` Huang, Ying
2026-05-11 15:22 ` David Hildenbrand (Arm)
2026-05-18 16:56 ` Jonathan Cameron
2026-04-28 15:50 ` [PATCH 3/7] mm/migrate: skip data copy for already-copied folios Shivank Garg
2026-05-11 15:35 ` David Hildenbrand (Arm)
2026-05-20 15:21 ` Garg, Shivank
2026-06-08 11:26 ` Garg, Shivank
2026-06-08 15:18 ` David Hildenbrand (Arm)
2026-06-08 15:41 ` Zi Yan
2026-06-08 15:43 ` David Hildenbrand (Arm)
2026-06-08 19:32 ` Garg, Shivank
2026-06-09 12:55 ` David Hildenbrand (Arm)
2026-06-08 15:09 ` David Hildenbrand (Arm)
2026-04-28 15:50 ` [PATCH 4/7] mm/migrate: add batch-copy path in migrate_pages_batch Shivank Garg
2026-05-11 15:40 ` David Hildenbrand (Arm)
2026-05-20 15:06 ` Garg, Shivank
2026-06-08 15:25 ` David Hildenbrand (Arm)
2026-06-08 15:36 ` Zi Yan
2026-06-08 20:40 ` Garg, Shivank
2026-06-08 21:17 ` Karim Manaouil
2026-05-21 13:20 ` Garg, Shivank
2026-04-28 15:50 ` [PATCH 5/7] mm/migrate: add copy offload registration infrastructure Shivank Garg
2026-05-11 15:46 ` David Hildenbrand (Arm)
2026-05-20 15:24 ` Garg, Shivank
2026-05-11 15:50 ` David Hildenbrand (Arm)
2026-05-20 15:22 ` Garg, Shivank
2026-05-25 2:16 ` David Rientjes
2026-05-25 2:19 ` David Rientjes
2026-06-11 9:55 ` Karim Manaouil
2026-06-11 18:44 ` Zi Yan
2026-04-28 15:50 ` [PATCH 6/7] drivers/migrate_offload: add DMA batch copy driver (dcbm) Shivank Garg
2026-06-09 0:00 ` Karim Manaouil
2026-06-09 7:31 ` Garg, Shivank
2026-06-09 16:17 ` Karim Manaouil
2026-06-10 12:26 ` Shivank Garg
2026-06-19 16:07 ` [PATCH 6/7] drivers/migrate_offload: add DMA batch copy driver (dcbm) Karim Manaouil
2026-06-19 16:32 ` Karim Manaouil [this message]
2026-06-22 10:03 ` Garg, Shivank
2026-04-28 15:50 ` [PATCH 7/7] mm/migrate: adjust NR_MAX_BATCHED_MIGRATION for testing Shivank Garg
2026-04-28 17:11 ` [PATCH 0/7] Accelerate page migration with batch copying and hardware offload Garg, Shivank
2026-04-28 19:33 ` David Hildenbrand (Arm)
2026-04-29 5:51 ` Garg, Shivank
2026-04-30 8:47 ` Huang, Ying
2026-05-08 11:04 ` Garg, Shivank
2026-05-08 11:28 ` Huang, Ying
2026-05-08 12:34 ` Garg, Shivank
2026-05-09 7:49 ` Huang, Ying
2026-05-10 15:03 ` Garg, Shivank
2026-05-12 2:15 ` Huang, Ying
2026-05-20 15:23 ` Garg, Shivank
2026-05-07 9:58 ` Huang, Ying
2026-05-11 15:19 ` David Hildenbrand (Arm)
2026-05-12 1:45 ` Huang, Ying
2026-05-11 15:53 ` David Hildenbrand (Arm)
2026-05-12 2:35 ` Huang, Ying
2026-05-12 6:34 ` David Hildenbrand (Arm)
2026-05-14 6:42 ` Huang, Ying
2026-05-20 15:35 ` Garg, Shivank
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