From: Baoquan He <bhe@redhat.com>
To: kexec@lists.infradead.org
Subject: [PATCH v21 3/5] arm64: kdump: reimplement crashkernel=X
Date: Thu, 17 Mar 2022 10:38:38 +0800 [thread overview]
Message-ID: <YjKfLo4YgSBG8v61@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20220227030717.1464-4-thunder.leizhen@huawei.com>
On 02/27/22 at 11:07am, Zhen Lei wrote:
> From: Chen Zhou <chenzhou10@huawei.com>
>
> There are following issues in arm64 kdump:
> 1. We use crashkernel=X to reserve crashkernel below 4G, which
> will fail when there is no enough low memory.
> 2. If reserving crashkernel above 4G, in this case, crash dump
> kernel will boot failure because there is no low memory available
~~ change it to "get boot failure" or "fail to boot"
> for allocation.
>
> To solve these issues, change the behavior of crashkernel=X and
> introduce crashkernel=X,[high,low]. crashkernel=X tries low allocation
> in DMA zone, and fall back to high allocation if it fails.
> We can also use "crashkernel=X,high" to select a region above DMA zone,
> which also tries to allocate at least 256M in DMA zone automatically.
> "crashkernel=Y,low" can be used to allocate specified size low memory.
>
> Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
> Co-developed-by: Zhen Lei <thunder.leizhen@huawei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org, Dave Young <dyoung@redhat.com>,
Vivek Goyal <vgoyal@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
kexec@lists.infradead.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
devicetree@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
linux-doc@vger.kernel.org, Randy Dunlap <rdunlap@infradead.org>,
Feng Zhou <zhoufeng.zf@bytedance.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Chen Zhou <dingguo.cz@antgroup.com>,
John Donnelly <John.p.donnelly@oracle.com>,
Dave Kleikamp <dave.kleikamp@oracle.com>
Subject: Re: [PATCH v21 3/5] arm64: kdump: reimplement crashkernel=X
Date: Thu, 17 Mar 2022 10:38:38 +0800 [thread overview]
Message-ID: <YjKfLo4YgSBG8v61@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20220227030717.1464-4-thunder.leizhen@huawei.com>
On 02/27/22 at 11:07am, Zhen Lei wrote:
> From: Chen Zhou <chenzhou10@huawei.com>
>
> There are following issues in arm64 kdump:
> 1. We use crashkernel=X to reserve crashkernel below 4G, which
> will fail when there is no enough low memory.
> 2. If reserving crashkernel above 4G, in this case, crash dump
> kernel will boot failure because there is no low memory available
~~ change it to "get boot failure" or "fail to boot"
> for allocation.
>
> To solve these issues, change the behavior of crashkernel=X and
> introduce crashkernel=X,[high,low]. crashkernel=X tries low allocation
> in DMA zone, and fall back to high allocation if it fails.
> We can also use "crashkernel=X,high" to select a region above DMA zone,
> which also tries to allocate at least 256M in DMA zone automatically.
> "crashkernel=Y,low" can be used to allocate specified size low memory.
>
> Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
> Co-developed-by: Zhen Lei <thunder.leizhen@huawei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org, Dave Young <dyoung@redhat.com>,
Vivek Goyal <vgoyal@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
kexec@lists.infradead.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
devicetree@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
linux-doc@vger.kernel.org, Randy Dunlap <rdunlap@infradead.org>,
Feng Zhou <zhoufeng.zf@bytedance.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Chen Zhou <dingguo.cz@antgroup.com>,
John Donnelly <John.p.donnelly@oracle.com>,
Dave Kleikamp <dave.kleikamp@oracle.com>
Subject: Re: [PATCH v21 3/5] arm64: kdump: reimplement crashkernel=X
Date: Thu, 17 Mar 2022 10:38:38 +0800 [thread overview]
Message-ID: <YjKfLo4YgSBG8v61@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20220227030717.1464-4-thunder.leizhen@huawei.com>
On 02/27/22 at 11:07am, Zhen Lei wrote:
> From: Chen Zhou <chenzhou10@huawei.com>
>
> There are following issues in arm64 kdump:
> 1. We use crashkernel=X to reserve crashkernel below 4G, which
> will fail when there is no enough low memory.
> 2. If reserving crashkernel above 4G, in this case, crash dump
> kernel will boot failure because there is no low memory available
~~ change it to "get boot failure" or "fail to boot"
> for allocation.
>
> To solve these issues, change the behavior of crashkernel=X and
> introduce crashkernel=X,[high,low]. crashkernel=X tries low allocation
> in DMA zone, and fall back to high allocation if it fails.
> We can also use "crashkernel=X,high" to select a region above DMA zone,
> which also tries to allocate at least 256M in DMA zone automatically.
> "crashkernel=Y,low" can be used to allocate specified size low memory.
>
> Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
> Co-developed-by: Zhen Lei <thunder.leizhen@huawei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
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next prev parent reply other threads:[~2022-03-17 2:38 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-27 3:07 [PATCH v21 0/5] support reserving crashkernel above 4G on arm64 kdump Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` [PATCH v21 1/5] kdump: return -ENOENT if required cmdline option does not exist Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-03-15 11:57 ` Baoquan He
2022-03-15 11:57 ` Baoquan He
2022-03-15 11:57 ` Baoquan He
2022-03-15 12:21 ` Baoquan He
2022-03-15 12:21 ` Baoquan He
2022-03-15 12:21 ` Baoquan He
2022-03-15 13:32 ` Leizhen
2022-03-15 13:32 ` Leizhen (ThunderTown)
2022-03-15 13:32 ` Leizhen (ThunderTown)
2022-03-16 5:17 ` Baoquan He
2022-03-16 5:17 ` Baoquan He
2022-03-16 5:17 ` Baoquan He
2022-03-16 5:39 ` Baoquan He
2022-03-16 5:39 ` Baoquan He
2022-03-16 5:39 ` Baoquan He
2022-03-16 6:15 ` Leizhen
2022-03-16 6:15 ` Leizhen (ThunderTown)
2022-03-16 6:15 ` Leizhen (ThunderTown)
2022-02-27 3:07 ` [PATCH v21 2/5] arm64: Use insert_resource() to simplify code Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` [PATCH v21 3/5] arm64: kdump: reimplement crashkernel=X Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-03-16 12:11 ` Baoquan He
2022-03-16 12:11 ` Baoquan He
2022-03-16 12:11 ` Baoquan He
2022-03-16 13:11 ` Leizhen
2022-03-16 13:11 ` Leizhen (ThunderTown)
2022-03-16 13:11 ` Leizhen (ThunderTown)
2022-03-17 2:36 ` Baoquan He
2022-03-17 2:36 ` Baoquan He
2022-03-17 2:36 ` Baoquan He
2022-03-17 3:19 ` Leizhen
2022-03-17 3:19 ` Leizhen (ThunderTown)
2022-03-17 3:19 ` Leizhen (ThunderTown)
2022-03-17 3:47 ` Baoquan He
2022-03-17 3:47 ` Baoquan He
2022-03-17 3:47 ` Baoquan He
2022-03-17 7:30 ` Leizhen
2022-03-17 7:30 ` Leizhen (ThunderTown)
2022-03-17 7:30 ` Leizhen (ThunderTown)
2022-03-17 2:38 ` Baoquan He [this message]
2022-03-17 2:38 ` Baoquan He
2022-03-17 2:38 ` Baoquan He
2022-03-17 3:23 ` Leizhen
2022-03-17 3:23 ` Leizhen (ThunderTown)
2022-03-17 3:23 ` Leizhen (ThunderTown)
2022-03-21 13:29 ` John Donnelly
2022-03-21 13:29 ` John Donnelly
2022-03-21 13:29 ` John Donnelly
2022-03-21 14:09 ` Dave Kleikamp
2022-03-21 14:09 ` Dave Kleikamp
2022-03-21 14:09 ` Dave Kleikamp
2022-03-22 1:58 ` Leizhen
2022-03-22 1:58 ` Leizhen (ThunderTown)
2022-03-22 1:58 ` Leizhen (ThunderTown)
2022-02-27 3:07 ` [PATCH v21 4/5] of: fdt: Add memory for devices by DT property "linux, usable-memory-range" Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` [PATCH v21 4/5] of: fdt: Add memory for devices by DT property "linux,usable-memory-range" Zhen Lei
2022-02-27 3:07 ` [PATCH v21 5/5] docs: kdump: Update the crashkernel description for arm64 Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-02-27 3:07 ` Zhen Lei
2022-03-15 11:59 ` Baoquan He
2022-03-15 11:59 ` Baoquan He
2022-03-15 11:59 ` Baoquan He
2022-04-08 9:32 ` [PATCH v21 0/5] support reserving crashkernel above 4G on arm64 kdump Baoquan He
2022-04-08 9:32 ` Baoquan He
2022-04-08 9:32 ` Baoquan He
2022-04-08 9:47 ` Leizhen
2022-04-08 9:47 ` Leizhen (ThunderTown)
2022-04-08 9:47 ` Leizhen (ThunderTown)
2022-04-11 2:56 ` Baoquan He
2022-04-11 2:56 ` Baoquan He
2022-04-11 2:56 ` Baoquan He
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