From: Catalin Marinas <catalin.marinas@arm.com>
To: Chen Zhou <chenzhou10@huawei.com>
Cc: wangkefeng.wang@huawei.com, linux-doc@vger.kernel.org,
bhsharma@redhat.com, huawei.libin@huawei.com,
guohanjun@huawei.com, will@kernel.org, bhe@redhat.com,
corbet@lwn.net, mingo@redhat.com, dyoung@redhat.com,
John.P.donnelly@oracle.com, arnd@arndb.de, xiexiuqi@huawei.com,
horms@verge.net.au, tglx@linutronix.de,
linux-arm-kernel@lists.infradead.org, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, robh+dt@kernel.org,
james.morse@arm.com, rppt@kernel.org, prabhakar.pkin@gmail.com,
nsaenzjulienne@suse.de
Subject: Re: [PATCH v14 01/11] x86: kdump: replace the hard-coded alignment with macro CRASH_ALIGN
Date: Wed, 24 Feb 2021 14:19:42 +0000 [thread overview]
Message-ID: <20210224141939.GA28965@arm.com> (raw)
In-Reply-To: <20210130071025.65258-2-chenzhou10@huawei.com>
On Sat, Jan 30, 2021 at 03:10:15PM +0800, Chen Zhou wrote:
> Move CRASH_ALIGN to header asm/kexec.h for later use. Besides, the
> alignment of crash kernel regions in x86 is 16M(CRASH_ALIGN), but
> function reserve_crashkernel() also used 1M alignment. So just
> replace hard-coded alignment 1M with macro CRASH_ALIGN.
[...]
> @@ -510,7 +507,7 @@ static void __init reserve_crashkernel(void)
> } else {
> unsigned long long start;
>
> - start = memblock_phys_alloc_range(crash_size, SZ_1M, crash_base,
> + start = memblock_phys_alloc_range(crash_size, CRASH_ALIGN, crash_base,
> crash_base + crash_size);
> if (start != crash_base) {
> pr_info("crashkernel reservation failed - memory is in use.\n");
There is a small functional change here for x86. Prior to this patch,
crash_base passed by the user on the command line is allowed to be 1MB
aligned. With this patch, such reservation will fail.
Is the current behaviour a bug in the current x86 code or it does allow
1MB-aligned reservations?
--
Catalin
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next prev parent reply other threads:[~2021-02-24 14:21 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-30 7:10 [PATCH v14 00/11] support reserving crashkernel above 4G on arm64 kdump Chen Zhou
2021-01-30 7:10 ` [PATCH v14 01/11] x86: kdump: replace the hard-coded alignment with macro CRASH_ALIGN Chen Zhou
2021-02-18 3:29 ` Baoquan He
2021-02-24 14:19 ` Catalin Marinas [this message]
2021-02-25 7:25 ` Baoquan He
2021-02-26 6:45 ` chenzhou
2021-02-26 15:38 ` Eric W. Biederman
2021-03-02 7:43 ` Baoquan He
2021-03-29 2:34 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 02/11] x86: kdump: make the lower bound of crash kernel reservation consistent Chen Zhou
2021-02-18 3:33 ` Baoquan He
2021-02-24 14:35 ` Catalin Marinas
2021-02-25 7:08 ` Baoquan He
2021-02-25 14:42 ` Catalin Marinas
2021-02-25 15:44 ` Baoquan He
2021-02-26 7:32 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 03/11] x86: kdump: use macro CRASH_ADDR_LOW_MAX in functions reserve_crashkernel() Chen Zhou
2021-02-18 8:23 ` Baoquan He
2021-01-30 7:10 ` [PATCH v14 04/11] x86: kdump: move xen_pv_domain() check and insert_resource() to setup_arch() Chen Zhou
2021-02-18 4:14 ` Baoquan He
2021-01-30 7:10 ` [PATCH v14 05/11] x86: kdump: move reserve_crashkernel[_low]() into crash_core.c Chen Zhou
2021-01-30 7:10 ` [PATCH v14 06/11] x86/elf: Move vmcore_elf_check_arch_cross to arch/x86/include/asm/elf.h Chen Zhou
2021-02-18 6:31 ` Baoquan He
2021-02-18 7:05 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 07/11] arm64: kdump: introduce some macroes for crash kernel reservation Chen Zhou
2021-02-04 16:20 ` Nicolas Saenz Julienne
2021-02-04 16:27 ` Nicolas Saenz Julienne
2021-01-30 7:10 ` [PATCH v14 08/11] arm64: kdump: reimplement crashkernel=X Chen Zhou
2021-02-24 16:04 ` Catalin Marinas
2021-02-26 10:31 ` chenzhou
2021-02-26 10:43 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 09/11] x86, arm64: Add ARCH_WANT_RESERVE_CRASH_KERNEL config Chen Zhou
2021-02-18 7:31 ` Baoquan He
2021-02-18 7:40 ` Baoquan He
2021-02-18 8:35 ` Baoquan He
2021-02-20 3:22 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 10/11] arm64: kdump: add memory for devices by DT property linux, usable-memory-range Chen Zhou
2021-01-30 7:10 ` [PATCH v14 11/11] kdump: update Documentation about crashkernel Chen Zhou
2021-01-30 17:53 ` Randy Dunlap
2021-02-04 1:53 ` chenzhou
2021-02-18 8:40 ` Baoquan He
2021-02-20 3:25 ` chenzhou
2021-02-08 6:46 ` [PATCH v14 00/11] support reserving crashkernel above 4G on arm64 kdump chenzhou
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