From: Oscar Salvador <osalvador@suse.de>
To: Gregory Price <gourry@gourry.net>
Cc: linux-mm@kvack.org, linux-acpi@vger.kernel.org,
kernel-team@meta.com, x86@kernel.org,
linux-kernel@vger.kernel.org, dave.hansen@linux.intel.com,
luto@kernel.org, peterz@infradead.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, hpa@zytor.com, rafael@kernel.org,
lenb@kernel.org, david@redhat.com, gregkh@linuxfoundation.org,
akpm@linux-foundation.org, dan.j.williams@intel.com,
Jonathan.Cameron@huawei.com, alison.schofield@intel.com,
rrichter@amd.com, rppt@kernel.org, bfaccini@nvidia.com,
haibo1.xu@intel.com, dave.jiang@intel.com,
Ira Weiny <ira.weiny@intel.com>, Fan Ni <fan.ni@samsung.com>
Subject: Re: [PATCH v8 0/3] memory,x86,acpi: hotplug memory alignment advisement
Date: Tue, 1 Apr 2025 20:53:47 +0200 [thread overview]
Message-ID: <Z-w2O8O9MGJ1Ok78@localhost.localdomain> (raw)
In-Reply-To: <20250127153405.3379117-1-gourry@gourry.net>
On Mon, Jan 27, 2025 at 10:34:02AM -0500, Gregory Price wrote:
> v8: nits and tag pickups
>
> When physical address regions are not aligned to memory block size,
> the misaligned portion is lost (stranded capacity).
>
> Block size (min/max/selected) is architecture defined. Most architectures
> tend to use the minimum block size or some simplistic heurist. On x86,
> memory block size increases up to 2GB, and is otherwise fitted to the
> alignment of non-hotplug (i.e. not special purpose memory).
I wonder if something like this could help us in improving the
ridiculous situation of having 16MB memory-block size on powerpc.
--
Oscar Salvador
SUSE Labs
next prev parent reply other threads:[~2025-04-01 18:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-27 15:34 [PATCH v8 0/3] memory,x86,acpi: hotplug memory alignment advisement Gregory Price
2025-01-27 15:34 ` [PATCH v8 1/3] memory: implement memory_block_advise/probe_max_size Gregory Price
2025-04-01 18:50 ` Oscar Salvador
2025-01-27 15:34 ` [PATCH v8 2/3] x86: probe memory block size advisement value during mm init Gregory Price
2025-04-01 18:51 ` Oscar Salvador
2025-01-27 15:34 ` [PATCH v8 3/3] acpi,srat: give memory block size advice based on CFMWS alignment Gregory Price
2025-04-01 18:52 ` Oscar Salvador
2025-04-01 18:33 ` [PATCH v8 0/3] memory,x86,acpi: hotplug memory alignment advisement Gregory Price
2025-04-01 18:53 ` Oscar Salvador [this message]
2025-04-01 19:08 ` David Hildenbrand
2025-04-02 9:39 ` Mike Rapoport
2025-04-02 10:07 ` David Hildenbrand
2025-04-01 19:44 ` Dan Williams
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