From: Dave Young <dyoung@redhat.com>
To: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org, fenghua.yu@intel.com,
tony.luck@intel.com, linux-ia64@vger.kernel.org,
kexec@lists.infradead.org,
Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>,
ebiederm@xmission.com, Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org, vgoyal@redhat.com
Subject: Re: [PATCH v3 1/5] crash: move crashkernel parsing and vmcore related code under CONFIG_CRASH_CORE
Date: Thu, 5 Jan 2017 14:17:45 +0800 [thread overview]
Message-ID: <20170105061745.GA9679@dhcp-128-65.nay.redhat.com> (raw)
In-Reply-To: <148336641471.25358.1234744226675502511.stgit@hbathini.in.ibm.com>
Hi, Hari
On 01/02/17 at 07:43pm, Hari Bathini wrote:
> Traditionally, kdump is used to save vmcore in case of a crash. Some
> architectures like powerpc can save vmcore using architecture specific
> support instead of kexec/kdump mechanism. Such architecture specific
> support also needs to reserve memory, to be used by dump capture kernel.
> crashkernel parameter can be a reused, for memory reservation, by such
> architecture specific infrastructure.
>
> But currently, code related to vmcoreinfo and parsing of crashkernel
> parameter is built under CONFIG_KEXEC_CORE. This patch introduces
> CONFIG_CRASH_CORE and moves the above mentioned code under this config,
> allowing code reuse without dependency on CONFIG_KEXEC. There is no
> functional change with this patch.
>
> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
> ---
>
> Changes from v2:
> * Used CONFIG_CRASH_CORE instead of CONFIG_KEXEC_CORE at
> appropriate places in printk and ksysfs.
>
>
> arch/Kconfig | 4
> include/linux/crash_core.h | 65 ++++++
> include/linux/kexec.h | 57 ------
> include/linux/printk.h | 4
> kernel/Makefile | 1
> kernel/crash_core.c | 445 ++++++++++++++++++++++++++++++++++++++++++++
> kernel/kexec_core.c | 404 ----------------------------------------
> kernel/ksysfs.c | 8 +
> kernel/printk/printk.c | 6 -
> 9 files changed, 531 insertions(+), 463 deletions(-)
> create mode 100644 include/linux/crash_core.h
> create mode 100644 kernel/crash_core.c
>
[snip]
> #ifndef CONFIG_TINY_RCU
> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> index 8b26964..d0dfebd 100644
> --- a/kernel/printk/printk.c
> +++ b/kernel/printk/printk.c
> @@ -32,7 +32,7 @@
> #include <linux/bootmem.h>
> #include <linux/memblock.h>
> #include <linux/syscalls.h>
> -#include <linux/kexec.h>
> +#include <linux/crash_core.h>
> #include <linux/kdb.h>
> #include <linux/ratelimit.h>
> #include <linux/kmsg_dump.h>
> @@ -951,7 +951,7 @@ const struct file_operations kmsg_fops = {
> .release = devkmsg_release,
> };
>
> -#ifdef CONFIG_KEXEC_CORE
> +#ifdef CONFIG_CRASH_CORE
> /*
> * This appends the listed symbols to /proc/vmcore
> *
> @@ -960,7 +960,7 @@ const struct file_operations kmsg_fops = {
> * symbols are specifically used so that utilities can access and extract the
> * dmesg log from a vmcore file after a crash.
> */
> -void log_buf_kexec_setup(void)
> +void log_buf_crash_setup(void)
I can not think of any better name about the CONFIG_CRASH_CORE though I
feel it is not excellent so personally I can live with it.
But for this function name log_buf_crash_setup is too general, I can not get
what it is doing from the name, how about change it to log_buf_vmcoreinfo_setup
> {
> VMCOREINFO_SYMBOL(log_buf);
> VMCOREINFO_SYMBOL(log_buf_len);
>
Thanks
Dave
next prev parent reply other threads:[~2017-01-05 6:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-02 14:13 [PATCH v3 0/5] kexec/fadump: remove dependency with CONFIG_KEXEC and reuse crashkernel parameter for fadump Hari Bathini
2017-01-02 14:13 ` [PATCH v3 1/5] crash: move crashkernel parsing and vmcore related code under CONFIG_CRASH_CORE Hari Bathini
2017-01-05 6:17 ` Dave Young [this message]
2017-01-05 17:42 ` Hari Bathini
2017-01-02 14:14 ` [PATCH v3 2/5] ia64: reuse append_elf_note() and final_note() functions Hari Bathini
2017-01-05 6:41 ` Dave Young
2017-01-02 14:14 ` [PATCH v3 3/5] powerpc/fadump: remove dependency with CONFIG_KEXEC Hari Bathini
2017-01-02 14:14 ` [PATCH v3 4/5] powerpc/fadump: reuse crashkernel parameter for fadump memory reservation Hari Bathini
2017-01-02 14:14 ` [PATCH v3 5/5] powerpc/fadump: update documentation about crashkernel parameter reuse Hari Bathini
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