Re: [PATCH 08/14] bcache: get allocated pages from specific owner

[Hannes Reinecke <hare@suse.de>]

On 6/15/21 7:49 AM, Coly Li wrote:
> From: Jianpeng Ma <jianpeng.ma@intel.com>
> 
> This patch implements bch_get_allocated_pages() of the buddy to be used to

buddy allocator

> get allocated pages from specific owner.
> 
> Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>
> Co-developed-by: Qiaowei Ren <qiaowei.ren@intel.com>
> Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
> Signed-off-by: Coly Li <colyli@suse.de>
> ---
>  drivers/md/bcache/nvm-pages.c | 6 ++++++
>  drivers/md/bcache/nvm-pages.h | 5 +++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/drivers/md/bcache/nvm-pages.c b/drivers/md/bcache/nvm-pages.c
> index 74d08950c67c..42b0504d9564 100644
> --- a/drivers/md/bcache/nvm-pages.c
> +++ b/drivers/md/bcache/nvm-pages.c
> @@ -397,6 +397,12 @@ void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
>  }
>  EXPORT_SYMBOL_GPL(bch_nvm_alloc_pages);
>  
> +struct bch_nvm_pages_owner_head *bch_get_allocated_pages(const char *owner_uuid)
> +{
> +	return find_owner_head(owner_uuid, false);
> +}
> +EXPORT_SYMBOL_GPL(bch_get_allocated_pages);
> +
>  #define BCH_PGOFF_TO_KVADDR(pgoff) ((void *)((unsigned long)pgoff << PAGE_SHIFT))
>  
>  static int init_owner_info(struct bch_nvm_namespace *ns)
> diff --git a/drivers/md/bcache/nvm-pages.h b/drivers/md/bcache/nvm-pages.h
> index 0ca699166855..c763bf2e2721 100644
> --- a/drivers/md/bcache/nvm-pages.h
> +++ b/drivers/md/bcache/nvm-pages.h
> @@ -64,6 +64,7 @@ int bch_nvm_init(void);
>  void bch_nvm_exit(void);
>  void *bch_nvm_alloc_pages(int order, const char *owner_uuid);
>  void bch_nvm_free_pages(void *addr, int order, const char *owner_uuid);
> +struct bch_nvm_pages_owner_head *bch_get_allocated_pages(const char *owner_uuid);
>  
>  #else
>  
> @@ -81,6 +82,10 @@ static inline void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
>  	return NULL;
>  }
>  static inline void bch_nvm_free_pages(void *addr, int order, const char *owner_uuid) { }
> +static inline struct bch_nvm_pages_owner_head *bch_get_allocated_pages(const char *owner_uuid)
> +{
> +	return NULL;
> +}
>  
>  #endif /* CONFIG_BCACHE_NVM_PAGES */
>  
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		           Kernel Storage Architect
hare@suse.de			                  +49 911 74053 688
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