From: Pavel Tatashin <pasha.tatashin@soleen.com>
To: Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
linux-kernel@vger.kernel.org,
Anshuman Khandual <anshuman.khandual@arm.com>,
linux-arm-kernel@lists.infradead.org,
Sudarshan Rajagopalan <sudaraja@codeaurora.org>,
David Hildenbrand <david@redhat.com>,
linux-mm@kvack.org
Cc: kernel-team@android.com
Subject: Re: Re: [PATCH 0/1] arm64/sparsemem: reduce SECTION_SIZE_BITS
Date: Thu, 28 Jan 2021 19:17:40 -0500 [thread overview]
Message-ID: <2489ef84-dd4d-b659-a61b-38582d168316@soleen.com> (raw)
In-Reply-To: <161125239746.2653965.4342337503570976678.b4-ty@kernel.org>
On 1/21/21 1:26 PM, Will Deacon wrote:
> On Wed, 20 Jan 2021 21:29:12 -0800, Sudarshan Rajagopalan wrote:
>> This patch is the follow-up from the discussions in the thread [1].
>> Reducing the section size has the merit of reducing wastage of reserved memory
>> for vmmemmap mappings for sections with large memory holes. Also with smaller
>> section size gives more grunularity and agility for memory hot(un)plugging.
>>
>> But there are also constraints in reducing SECTION_SIZE_BIT:
>>
>> [...]
>
> Applied to arm64 (for-next/misc), thanks!
We have been using 128M for 4K pages for a while, using patch [1] without issues.
One thing that needs to be also modified is makedumpfile [2]- line 76, must update it SECTIONS_SIZE_BITS based on the PAGESIZE.
[1] https://lore.kernel.org/lkml/20190423203843.2898-1-pasha.tatashin@soleen.com/
[2] https://sourceforge.net/p/makedumpfile/code/ci/master/tree/arch/arm64.c
>
> [1/1] arm64/sparsemem: reduce SECTION_SIZE_BITS
> https://git.kernel.org/arm64/c/f0b13ee23241
>
> Cheers,
>
prev parent reply other threads:[~2021-01-29 0:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 5:29 Sudarshan Rajagopalan
2021-01-21 5:29 ` [PATCH 1/1] " Sudarshan Rajagopalan
2021-01-21 10:08 ` Christoph Lameter
2021-01-21 15:54 ` Catalin Marinas
2021-01-21 13:36 ` Will Deacon
2021-01-22 2:58 ` Anshuman Khandual
2021-01-21 13:45 ` David Hildenbrand
2021-01-21 14:16 ` Mike Rapoport
2021-01-21 16:04 ` David Hildenbrand
2021-01-21 15:51 ` Catalin Marinas
2021-01-21 18:26 ` [PATCH 0/1] " Will Deacon
2021-01-29 0:17 ` Pavel Tatashin [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2489ef84-dd4d-b659-a61b-38582d168316@soleen.com \
--to=pasha.tatashin@soleen.com \
--cc=anshuman.khandual@arm.com \
--cc=catalin.marinas@arm.com \
--cc=david@redhat.com \
--cc=kernel-team@android.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=sudaraja@codeaurora.org \
--cc=will@kernel.org \
--subject='Re: Re: [PATCH 0/1] arm64/sparsemem: reduce SECTION_SIZE_BITS' \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).