linux-kernel - Re: [PATCH RFC 2/2] s390/mm: don't set ARCH_KEEP

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Message-ID: <20200626163215.GA4268@osiris>
Date:   Fri, 26 Jun 2020 18:32:15 +0200
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-s390@...r.kernel.org, Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Philipp Rudo <prudo@...ux.ibm.com>,
        Michael Holzheu <holzheu@...ux.vnet.ibm.com>
Subject: Re: [PATCH RFC 2/2] s390/mm: don't set ARCH_KEEP_MEMBLOCK

On Fri, Apr 17, 2020 at 05:01:51PM +0200, David Hildenbrand wrote:
> Commit 50be63450728 ("s390/mm: Convert bootmem to memblock") mentions
> 	"The original bootmem allocator is getting replaced by memblock. To
> 	cover the needs of the s390 kdump implementation the physical
> 	memory list is used."
> 
> zcore was converted to use resources instead of memblocks.
> memblock_discard() will *not* mess with "physmem", only with "memory" and
> "reserved" memblocks. So, that data will stay after early boot, to be
> used in arch/s390/kernel/crash_dump.c to create the ELF header from
> inside the 2nd (a.k.a. dumping) kernel.
> 
> We no longer need ARCH_KEEP_MEMBLOCK.
> 
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> Cc: Vasily Gorbik <gor@...ux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@...ibm.com>
> Cc: Philipp Rudo <prudo@...ux.ibm.com>
> Cc: Michael Holzheu <holzheu@...ux.vnet.ibm.com>
> Signed-off-by: David Hildenbrand <david@...hat.com>
> ---
>  arch/s390/Kconfig | 1 -
>  1 file changed, 1 deletion(-)

Applied, thanks!