Re: [PATCH] dma-buf: Add DmaBufTotal counter in meminfo

[Matthew Wilcox <willy@xxxxxxxxxxxxx>]

On Fri, Apr 16, 2021 at 11:37:19AM +0200, Peter Enderborg wrote:
> diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
> index 6fa761c9cc78..3c1a82b51a6f 100644
> --- a/fs/proc/meminfo.c
> +++ b/fs/proc/meminfo.c
> @@ -16,6 +16,7 @@
>  #ifdef CONFIG_CMA
>  #include <linux/cma.h>
>  #endif
> +#include <linux/dma-buf.h>
>  #include <asm/page.h>
>  #include "internal.h"
>  
> @@ -145,6 +146,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
>  	show_val_kb(m, "CmaFree:        ",
>  		    global_zone_page_state(NR_FREE_CMA_PAGES));
>  #endif
> +	show_val_kb(m, "DmaBufTotal:    ", dma_buf_get_size());
>  
>  	hugetlb_report_meminfo(m);
>  

... and if CONFIG_DMA_SHARED_BUFFER is not set ...?