From: Borislav Petkov <bp@alien8.de>
To: Mike Rapoport <rppt@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Baoquan He <bhe@redhat.com>, David Hildenbrand <david@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Mel Gorman <mgorman@suse.de>, Michal Hocko <mhocko@kernel.org>,
Mike Rapoport <rppt@linux.ibm.com>, Qian Cai <cai@lca.pw>,
Thomas Gleixner <tglx@linutronix.de>,
Vlastimil Babka <vbabka@suse.cz>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org
Subject: Re: [PATCH 1/2] x86/setup: consolidate early memory reservations
Date: Mon, 25 Jan 2021 17:56:43 +0100 [thread overview]
Message-ID: <20210125165643.GH23070@zn.tnic> (raw)
In-Reply-To: <20210125153114.GH6332@kernel.org>
On Mon, Jan 25, 2021 at 05:31:14PM +0200, Mike Rapoport wrote:
> This would make sense but it's tricky. From memblock perspective,
> allocations are always allowed and it is the user responsibility to ensure
> all the early reservations are done before allocating memory.
Yah, I don't trust my users to know that for sure...
> So adding such a WARN would require a new memblock API and it's adoption by
> all architectures, which is way beyond the scope of this series :)
So definitely not for those series but I could imagine something like
memblock_reserve()
if (memblock_allocations_allowed())
WARN
or so. This way you don't need to touch the archtectures. It all depends
on what the other arches need/use.
Or you could even make that a new memblock_reserve_warn() thing or so
and wrap that functionality in it and have x86 call it only...
Anyway, something to that effect.
As to those two patches, you can add
Acked-by: Borislav Petkov <bp@suse.de>
to the next revision since akpm is going to take them.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-01-25 16:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 8:32 [PATCH 0/2] x86/setup: consolidate early memory reservations Mike Rapoport
2021-01-15 8:32 ` [PATCH 1/2] " Mike Rapoport
2021-01-15 10:10 ` David Hildenbrand
2021-01-25 14:50 ` Borislav Petkov
2021-01-25 15:31 ` Mike Rapoport
2021-01-25 16:56 ` Borislav Petkov [this message]
2021-01-25 14:59 ` Borislav Petkov
2021-01-25 15:33 ` Mike Rapoport
2021-01-15 8:32 ` [PATCH 2/2] x86/setup: merge several reservations of start of the memory Mike Rapoport
2021-01-15 10:09 ` David Hildenbrand
2021-01-25 14:55 ` Borislav Petkov
2021-01-15 11:42 ` [PATCH 0/2] x86/setup: consolidate early memory reservations Baoquan He
2021-01-15 11:56 ` Baoquan He
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