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

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Message-ID: <YEkHQ4PnxJkqJeoU@kernel.org>
Date:   Wed, 10 Mar 2021 19:52:03 +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@...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: Re: [PATCH v3 0/2] x86/setup: consolidate early memory reservations

Any comments on these?

On Tue, Mar 02, 2021 at 12:04:04PM +0200, Mike Rapoport wrote:
> 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
> 

-- 
Sincerely yours,
Mike.