From: Andrew Morton <akpm@linux-foundation.org>
To: Donet Tom <donettom@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>,
Mike Rapoport <rppt@kernel.org>,
Oscar Salvador <osalvador@suse.de>, Zi Yan <ziy@nvidia.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ritesh Harjani <ritesh.list@gmail.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
"Rafael J . Wysocki" <rafael@kernel.org>,
Danilo Krummrich <dakr@kernel.org>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Alison Schofield <alison.schofield@intel.com>,
Yury Norov <yury.norov@gmail.com>,
Dave Jiang <dave.jiang@intel.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Nilay Shroff <nilay@linux.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v7 1/5] drivers/base/node: Optimize memory block registration to reduce boot time
Date: Tue, 3 Jun 2025 20:07:29 -0700 [thread overview]
Message-ID: <20250603200729.b7581e017e4ca63f502c795e@linux-foundation.org> (raw)
In-Reply-To: <2a0a05c2dffc62a742bf1dd030098be4ce99be28.1748452241.git.donettom@linux.ibm.com>
On Wed, 28 May 2025 12:18:00 -0500 Donet Tom <donettom@linux.ibm.com> wrote:
> During node device initialization, `memory blocks` are registered under
> each NUMA node. The `memory blocks` to be registered are identified using
> the node’s start and end PFNs, which are obtained from the node's pg_data
It's quite unconventional to omit the [0/N] changelog. This omission
somewhat messed up my processes so I added a one-liner to this.
>
> ...
>
> Test Results on My system with 32TB RAM
> =======================================
> 1. Boot time with CONFIG_DEFERRED_STRUCT_PAGE_INIT enabled.
>
> Without this patch
> ------------------
> Startup finished in 1min 16.528s (kernel)
>
> With this patch
> ---------------
> Startup finished in 17.236s (kernel) - 78% Improvement
Well someone is in for a nice surprise.
> 2. Boot time with CONFIG_DEFERRED_STRUCT_PAGE_INIT disabled.
>
> Without this patch
> ------------------
> Startup finished in 28.320s (kernel)
what. CONFIG_DEFERRED_STRUCT_PAGE_INIT is supposed to make bootup
faster.
next prev parent reply other threads:[~2025-06-04 3:07 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-28 17:18 Donet Tom
2025-05-28 17:18 ` [PATCH v7 2/5] drivers/base/node: remove register_mem_block_under_node_early() Donet Tom
2025-05-28 17:18 ` [PATCH v7 3/5] drivers/base/node: Remove register_memory_blocks_under_node() function call from register_one_node Donet Tom
2025-05-28 17:18 ` [PATCH v7 4/5] drivers/base/node: Rename register_memory_blocks_under_node() and remove context argument Donet Tom
2025-05-28 17:18 ` [PATCH v7 5/5] drivers/base/node: Rename __register_one_node() to register_one_node() Donet Tom
2025-06-04 3:07 ` Andrew Morton [this message]
2025-06-04 9:45 ` [PATCH v7 1/5] drivers/base/node: Optimize memory block registration to reduce boot time David Hildenbrand
2025-06-04 13:17 ` Donet Tom
2025-06-04 13:30 ` David Hildenbrand
2025-06-04 15:57 ` Donet Tom
2025-06-04 13:25 ` Donet Tom
2025-06-04 9:38 ` David Hildenbrand
2025-06-04 13:27 ` Donet Tom
2025-06-04 13:30 ` David Hildenbrand
2025-06-09 14:03 ` [Fixup PATCH] drivers/base/node: Restored the removed extra line Donet Tom
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