Re: [PATCH v2 06/20] vmcore, procfs: introduce a flag to distinguish objects copied in 2nd kernel

Yanfei Zhang
2013-03-06T15:56:05Z

2013/3/2 HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>:
> The part of dump target memory is copied into the 2nd kernel if it
> doesn't satisfy mmap()'s page-size boundary requirement. To
> distinguish such copied object from usual old memory, a flag
> MEM_TYPE_CURRENT_KERNEL is introduced. If this flag is set, the object
> is considered being copied into buffer on the 2nd kernel.

Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>

>
> Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
> ---
>
> include/linux/proc_fs.h | 8 +++++++-
> 1 files changed, 7 insertions(+), 1 deletions(-)
>
> diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
> index 8307f2f..11dd592 100644
> --- a/include/linux/proc_fs.h
> +++ b/include/linux/proc_fs.h
> @@ -97,11 +97,17 @@ struct kcore_list {
> int type;
> };
>
> +#define MEM_TYPE_CURRENT_KERNEL 0x1
> +
> struct vmcore {
> struct list_head list;
> - unsigned long long paddr;
> + union {
> + unsigned long long paddr;
> + char *buf;
> + };
> unsigned long long size;
> loff_t offset;
> + unsigned int flag;
> };
>
> #ifdef CONFIG_PROC_FS
>
> --
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