From: Ingo Molnar <mingo@kernel.org>
To: Aaron Thompson <dev@aaront.org>
Cc: Mike Rapoport <rppt@kernel.org>,
linux-mm@kvack.org, "H. Peter Anvin" <hpa@zytor.com>,
Alexander Potapenko <glider@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Shevchenko <andy@infradead.org>,
Ard Biesheuvel <ardb@kernel.org>, Borislav Petkov <bp@alien8.de>,
Darren Hart <dvhart@infradead.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
David Rientjes <rientjes@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Ingo Molnar <mingo@redhat.com>, Marco Elver <elver@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
kasan-dev@googlegroups.com, linux-efi@vger.kernel.org,
linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH v2 1/1] mm: Always release pages to the buddy allocator in memblock_free_late().
Date: Thu, 5 Jan 2023 11:48:13 +0100 [thread overview]
Message-ID: <Y7aq7fzKZ/EdLVp3@gmail.com> (raw)
In-Reply-To: <010001858025fc22-e619988e-c0a5-4545-bd93-783890b9ad14-000000@email.amazonses.com>
* Aaron Thompson <dev@aaront.org> wrote:
> For example, on an Amazon EC2 t3.micro VM (1 GB) booting via EFI:
>
> v6.2-rc2:
> # grep -E 'Node|spanned|present|managed' /proc/zoneinfo
> Node 0, zone DMA
> spanned 4095
> present 3999
> managed 3840
> Node 0, zone DMA32
> spanned 246652
> present 245868
> managed 178867
>
> v6.2-rc2 + patch:
> # grep -E 'Node|spanned|present|managed' /proc/zoneinfo
> Node 0, zone DMA
> spanned 4095
> present 3999
> managed 3840
> Node 0, zone DMA32
> spanned 246652
> present 245868
> managed 222816 # +43,949 pages
[ Note the annotation I added to the output - might be useful in the changelog too. ]
So this patch adds around +17% of RAM to this 1 GB virtual system? That
looks rather significant ...
Thanks,
Ingo
next prev parent reply other threads:[~2023-01-05 10:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-04 7:43 [PATCH 0/1] Pages not released from memblock to the buddy allocator Aaron Thompson
2023-01-05 1:43 ` David Rientjes
2023-01-05 4:17 ` [PATCH v2 " Aaron Thompson
[not found] ` <20230105041650.1485-1-dev@aaront.org>
2023-01-05 4:17 ` [PATCH v2 1/1] mm: Always release pages to the buddy allocator in memblock_free_late() Aaron Thompson
2023-01-30 7:40 ` Xu Yu
2023-01-05 10:48 ` Ingo Molnar [this message]
2023-01-06 2:02 ` Aaron Thompson
2023-01-06 3:12 ` Ingo Molnar
2023-01-30 7:47 ` Xu Yu
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