From: "Leizhen (ThunderTown)" <thunder.leizhen@huawei.com>
To: 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>,
Baoquan He <bhe@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>
Cc: Randy Dunlap <rdunlap@infradead.org>,
Feng Zhou <zhoufeng.zf@bytedance.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
"Chen Zhou" <dingguo.cz@antgroup.com>
Subject: Re: [PATCH v17 04/10] x86: kdump: move xen_pv_domain() check and insert_resource() to setup_arch()
Date: Wed, 15 Dec 2021 16:56:11 +0800 [thread overview]
Message-ID: <03bd43f3-14a1-dbd1-9fff-118c0885653c@huawei.com> (raw)
In-Reply-To: <d328aede-1282-b4d5-f17a-aa9c3e9f6563@huawei.com>
On 2021/12/14 19:40, Leizhen (ThunderTown) wrote:
>
>
> On 2021/12/10 14:55, Zhen Lei wrote:
>> From: Chen Zhou <chenzhou10@huawei.com>
>>
>> We will make the functions reserve_crashkernel() as generic, the
>> xen_pv_domain() check in reserve_crashkernel() is relevant only to
>> x86, the same as insert_resource() in reserve_crashkernel[_low]().
>> So move xen_pv_domain() check and insert_resource() to setup_arch()
>> to keep them in x86.
>>
>> Suggested-by: Mike Rapoport <rppt@kernel.org>
>> Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
>> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
>> Tested-by: John Donnelly <John.p.donnelly@oracle.com>
>> Tested-by: Dave Kleikamp <dave.kleikamp@oracle.com>
>> Acked-by: Baoquan He <bhe@redhat.com>
>> ---
>> arch/x86/kernel/setup.c | 19 +++++++++++--------
>> 1 file changed, 11 insertions(+), 8 deletions(-)
>>
>> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
>> index bb2a0973b98059e..7ae00716a208f82 100644
>> --- a/arch/x86/kernel/setup.c
>> +++ b/arch/x86/kernel/setup.c
>> @@ -456,7 +456,6 @@ static int __init reserve_crashkernel_low(void)
>>
>> crashk_low_res.start = low_base;
>> crashk_low_res.end = low_base + low_size - 1;
>> - insert_resource(&iomem_resource, &crashk_low_res);
>> #endif
>> return 0;
>> }
>> @@ -480,11 +479,6 @@ static void __init reserve_crashkernel(void)
>> high = true;
>> }
>>
>> - if (xen_pv_domain()) {
>> - pr_info("Ignoring crashkernel for a Xen PV domain\n");
>> - return;
>> - }
>> -
>> /* 0 means: find the address automatically */
>> if (!crash_base) {
>> /*
>> @@ -531,7 +525,6 @@ static void __init reserve_crashkernel(void)
>>
>> crashk_res.start = crash_base;
>> crashk_res.end = crash_base + crash_size - 1;
>> - insert_resource(&iomem_resource, &crashk_res);
>> }
>> #else
>> static void __init reserve_crashkernel(void)
>> @@ -1143,7 +1136,17 @@ void __init setup_arch(char **cmdline_p)
>> * Reserve memory for crash kernel after SRAT is parsed so that it
>> * won't consume hotpluggable memory.
>> */
>> - reserve_crashkernel();
>
> Hi Baoquan:
> How about move "#ifdef CONFIG_KEXEC_CORE" here, so that we can remove the
> empty reserve_crashkernel(). In fact, xen_pv_domain() is invoked only
> when CONFIG_KEXEC_CORE is enabled before.
Hi Baoquan:
Did you miss this email? If no reply, I will keep it no change.
>
>> + if (xen_pv_domain())
>> + pr_info("Ignoring crashkernel for a Xen PV domain\n");
>> + else {
>> + reserve_crashkernel();
>> +#ifdef CONFIG_KEXEC_CORE
>> + if (crashk_res.end > crashk_res.start)
>> + insert_resource(&iomem_resource, &crashk_res);
>> + if (crashk_low_res.end > crashk_low_res.start)
>> + insert_resource(&iomem_resource, &crashk_low_res);
>> +#endif
>> + }
>>
>> memblock_find_dma_reserve();
>>
>>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> .
>
next prev parent reply other threads:[~2021-12-15 8:56 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-10 6:55 [PATCH v17 00/10] support reserving crashkernel above 4G on arm64 kdump Zhen Lei
2021-12-10 6:55 ` [PATCH v17 01/10] x86: kdump: replace the hard-coded alignment with macro CRASH_ALIGN Zhen Lei
2021-12-13 13:17 ` Baoquan He
2021-12-14 8:41 ` Leizhen (ThunderTown)
2021-12-13 14:26 ` john.p.donnelly
2021-12-13 19:54 ` Borislav Petkov
2021-12-14 9:27 ` Leizhen (ThunderTown)
2021-12-10 6:55 ` [PATCH v17 02/10] x86: kdump: make the lower bound of crash kernel reservation consistent Zhen Lei
2021-12-13 13:37 ` Baoquan He
2021-12-14 8:48 ` Leizhen (ThunderTown)
2021-12-13 14:27 ` john.p.donnelly
2021-12-14 19:07 ` Borislav Petkov
2021-12-14 19:24 ` Catalin Marinas
2021-12-15 2:10 ` Leizhen (ThunderTown)
2021-12-15 3:42 ` Baoquan He
2021-12-15 11:01 ` Catalin Marinas
2021-12-15 11:16 ` Baoquan He
2021-12-15 11:45 ` Leizhen (ThunderTown)
2021-12-10 6:55 ` [PATCH v17 03/10] x86: kdump: use macro CRASH_ADDR_LOW_MAX in functions reserve_crashkernel() Zhen Lei
2021-12-13 14:28 ` john.p.donnelly
2021-12-14 8:54 ` Baoquan He
2021-12-14 9:38 ` Borislav Petkov
2021-12-14 9:56 ` Baoquan He
2021-12-14 14:24 ` Borislav Petkov
2021-12-15 6:01 ` Baoquan He
2021-12-15 13:28 ` Borislav Petkov
2021-12-16 1:10 ` Baoquan He
2021-12-16 2:46 ` Leizhen (ThunderTown)
2021-12-16 11:07 ` Borislav Petkov
2021-12-16 12:08 ` Leizhen (ThunderTown)
2021-12-16 12:23 ` Leizhen (ThunderTown)
2021-12-16 14:48 ` Borislav Petkov
2021-12-17 2:51 ` Leizhen (ThunderTown)
2021-12-21 22:23 ` Borislav Petkov
2021-12-16 10:55 ` Borislav Petkov
2021-12-16 14:11 ` Baoquan He
2021-12-16 14:58 ` Borislav Petkov
2021-12-10 6:55 ` [PATCH v17 04/10] x86: kdump: move xen_pv_domain() check and insert_resource() to setup_arch() Zhen Lei
2021-12-13 14:29 ` john.p.donnelly
2021-12-14 11:40 ` Leizhen (ThunderTown)
2021-12-15 8:56 ` Leizhen (ThunderTown) [this message]
2021-12-15 9:22 ` Baoquan He
2021-12-10 6:55 ` [PATCH v17 05/10] x86: kdump: move reserve_crashkernel[_low]() into crash_core.c Zhen Lei
2021-12-13 14:30 ` john.p.donnelly
2021-12-14 10:45 ` Baoquan He
2021-12-14 12:38 ` Leizhen (ThunderTown)
2021-12-16 11:17 ` Borislav Petkov
2021-12-16 13:15 ` Leizhen (ThunderTown)
2021-12-16 14:51 ` Borislav Petkov
2021-12-10 6:55 ` [PATCH v17 06/10] arm64: kdump: introduce some macros for crash kernel reservation Zhen Lei
2021-12-13 14:30 ` john.p.donnelly
2021-12-10 6:55 ` [PATCH v17 07/10] arm64: kdump: reimplement crashkernel=X Zhen Lei
2021-12-13 14:31 ` john.p.donnelly
2021-12-10 6:55 ` [PATCH v17 08/10] of: fdt: Aggregate the processing of "linux,usable-memory-range" Zhen Lei
2021-12-10 16:39 ` Rob Herring
2021-12-13 14:34 ` john.p.donnelly
2021-12-10 6:55 ` [PATCH v17 09/10] of: fdt: Add memory for devices by DT property "linux,usable-memory-range" Zhen Lei
2021-12-10 16:43 ` Rob Herring
2021-12-13 14:33 ` john.p.donnelly
2021-12-10 6:55 ` [PATCH v17 10/10] kdump: update Documentation about crashkernel Zhen Lei
2021-12-13 14:34 ` john.p.donnelly
2021-12-10 7:15 ` [PATCH v17 00/10] support reserving crashkernel above 4G on arm64 kdump Kefeng Wang
2021-12-13 18:50 ` Will Deacon
2021-12-13 14:37 ` john.p.donnelly
2021-12-13 18:56 ` Catalin Marinas
2021-12-13 18:57 ` Borislav Petkov
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