linux-kernel - [PATCH v3 0/2] x86/setup: consolidate early memory reservations

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Date:   Tue,  2 Mar 2021 12:04:04 +0200
From:   Mike Rapoport <rppt@...nel.org>
To:     x86@...nel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Baoquan He <bhe@...hat.com>, Borislav Petkov <bp@...en8.de>,
        David Hildenbrand <david@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Mel Gorman <mgorman@...e.de>, Michal Hocko <mhocko@...nel.org>,
        Mike Rapoport <rppt@...nel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>, Qian Cai <cai@....pw>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vlastimil Babka <vbabka@...e.cz>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: [PATCH v3 0/2] x86/setup: consolidate early memory reservations

From: Mike Rapoport <rppt@...ux.ibm.com>

Hi,

David noticed that we do some of memblock_reserve() calls after allocations
are possible:

https://lore.kernel.org/lkml/6ba6bde3-1520-5cd0-f987-32d543f0b79f@redhat.com

The below patches consolidate early memory reservations done during
setup_arch() so that memory used by firmware, bootloader, kernel text/data
and the memory that should be excluded from the available memory for
whatever other reason is reserved before memblock allocations are possible.

The patches are rebased on v5.12-rc1 and I think x86 tree is the best way
to merge them.

v3:
* rebase on v5.12-rc1

v2: https://lore.kernel.org/lkml/20210128105711.10428-1-rppt@kernel.org
* get rid of trim_platform_memory_ranges() and call trim_snb_memory()
  directly, per Boris comments
* massage changelog and comments to use passive voice, per Boris
* add Acked-by and Reviewed-by, thanks Boris and David

v1: https://lore.kernel.org/lkml/20210115083255.12744-1-rppt@kernel.org

Mike Rapoport (2):
  x86/setup: consolidate early memory reservations
  x86/setup: merge several reservations of start of the memory

 arch/x86/kernel/setup.c | 95 ++++++++++++++++++++---------------------
 1 file changed, 46 insertions(+), 49 deletions(-)

-- 
2.28.0