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From: Catalin Marinas <catalin.marinas@arm.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: Chen Zhou <chenzhou10@huawei.com>,
	will@kernel.org, james.morse@arm.com, tglx@linutronix.de,
	mingo@redhat.com, dyoung@redhat.com, bhe@redhat.com,
	corbet@lwn.net, John.P.donnelly@oracle.com,
	prabhakar.pkin@gmail.com, bhsharma@redhat.com,
	horms@verge.net.au, robh+dt@kernel.org, arnd@arndb.de,
	nsaenzjulienne@suse.de, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kexec@lists.infradead.org,
	linux-doc@vger.kernel.org, guohanjun@huawei.com,
	xiexiuqi@huawei.com, huawei.libin@huawei.com,
	wangkefeng.wang@huawei.com
Subject: Re: [PATCH v11 2/5] x86: kdump: move reserve_crashkernel_low() into crash_core.c
Date: Tue, 1 Sep 2020 17:50:02 +0100
Message-ID: <20200901165001.GJ5561@gaia> (raw)
In-Reply-To: <20200806133627.GB2077191@gmail.com>

On Thu, Aug 06, 2020 at 03:36:27PM +0200, Ingo Molnar wrote:
> 
> * Chen Zhou <chenzhou10@huawei.com> wrote:
> 
> > In preparation for supporting reserve_crashkernel_low in arm64 as
> > x86_64 does, move reserve_crashkernel_low() into kernel/crash_core.c.
> > 
> > BTW, move x86_64 CRASH_ALIGN to 2M suggested by Dave. CONFIG_PHYSICAL_ALIGN
> > can be selected from 2M to 16M, move to the same as arm64.
> > 
> > Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
> > ---
> >  arch/x86/include/asm/kexec.h | 24 ++++++++++
> >  arch/x86/kernel/setup.c      | 86 +++---------------------------------
> >  include/linux/crash_core.h   |  3 ++
> >  include/linux/kexec.h        |  2 -
> >  kernel/crash_core.c          | 74 +++++++++++++++++++++++++++++++
> >  kernel/kexec_core.c          | 17 -------
> >  6 files changed, 107 insertions(+), 99 deletions(-)
> 
> Since the changes are centered around arm64, I suppose the arm64 tree 
> will carry this patchset?
> 
> Assuming that this is a 100% invariant moving of code that doesn't 
> regress on x86:
> 
>   Acked-by: Ingo Molnar <mingo@kernel.org>

Thanks Ingo. The only difference I see is that CRASH_ALIGN has been
reduced to 2M here from 16M for x86. Would this break configs that have
PHYSICAL_ALIGN > 2M?

-- 
Catalin

  reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-01 13:08 [PATCH v11 0/5] support reserving crashkernel above 4G on arm64 kdump Chen Zhou
2020-08-01 13:08 ` [PATCH v11 1/5] arm64: kdump: add macro CRASH_ALIGN and CRASH_ADDR_LOW_MAX Chen Zhou
2020-08-01 13:08 ` [PATCH v11 2/5] x86: kdump: move reserve_crashkernel_low() into crash_core.c Chen Zhou
2020-08-06 13:36   ` Ingo Molnar
2020-09-01 16:50     ` Catalin Marinas [this message]
2020-08-08  9:59   ` Dave Young
2020-08-01 13:08 ` [PATCH v11 3/5] arm64: kdump: reimplement crashkernel=X Chen Zhou
2020-09-02 17:09   ` Catalin Marinas
2020-09-03 11:26     ` chenzhou
2020-09-03 13:18       ` chenzhou
2020-09-04  3:04       ` Dave Young
2020-09-04  3:10         ` Dave Young
2020-09-04  4:02           ` chenzhou
2020-09-04  4:16             ` Dave Young
2020-09-04  6:39               ` chenzhou
2020-08-01 13:08 ` [PATCH v11 4/5] arm64: kdump: add memory for devices by DT property linux,usable-memory-range Chen Zhou
2020-08-01 13:08 ` [PATCH v11 5/5] kdump: update Documentation about crashkernel Chen Zhou
2020-08-08 10:02   ` Dave Young
2020-08-10  3:28     ` chenzhou
2020-08-10  5:59       ` Dave Young
2020-08-10  6:03       ` Dave Young
2020-08-18  7:07         ` chenzhou
2020-08-19 12:03           ` Dave Young
2020-08-28  1:59             ` chenzhou
2020-09-01 17:13           ` Catalin Marinas
2020-09-02 16:42           ` Catalin Marinas
2020-09-02 17:13   ` Catalin Marinas
2020-09-03 11:56     ` chenzhou
2020-08-06 11:37 ` [PATCH v11 0/5] support reserving crashkernel above 4G on arm64 kdump Dave Young

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