[Crash-utility] no swapper_space

[Dave Anderson]

----- "Per Fransson" <per.xx.fransson at stericsson.com> wrote:

> Hi Dave,
> 
> "kmem -i" aborts before it completes when swapping isn't enabled. This
> is a suggestion for fixing it.
> 
> Regards,
> Per

Looks safe enough -- re-formatted and queued for the next release.

Thanks,
  Dave
 
> 
> diff --git a/memory.c b/memory.c
> index 287285f..cb02c57 100755
> --- a/memory.c
> +++ b/memory.c
> @@ -6717,7 +6717,7 @@ dump_kmeminfo(void)
>  	} else if (dump_vm_stat("NR_FILE_PAGES", &nr_file_pages, 0)) {
>  		char *swapper_space = GETBUF(SIZE(address_space));
>  		
> -                if (!readmem(symbol_value("swapper_space"), KVADDR, swapper_space,
> +                if (!symbol_exists("swapper_space") || !readmem(symbol_value("swapper_space"), KVADDR, swapper_space,
>                      SIZE(address_space), "swapper_space", RETURN_ON_ERROR))
>  			swapper_space_nrpages = 0;
>  		else
> @@ -6796,7 +6796,8 @@ dump_kmeminfo(void)
>           *  get swap data from dump_swap_info().
>           */
>  	fprintf(fp, "\n");
> -        if (dump_swap_info(RETURN_ON_ERROR, &totalswap_pages, 
> +	if (symbol_exists("swapper_space")) {
> +	  if (dump_swap_info(RETURN_ON_ERROR, &totalswap_pages, 
>  	    &totalused_pages)) {
>  	        fprintf(fp, "%10s  %7ld  %11s         ----\n", 
>  			"TOTAL SWAP", totalswap_pages, 
> @@ -6816,7 +6817,7 @@ dump_kmeminfo(void)
>  	} else
>  		error(INFO, "swap_info[%ld].swap_map at %lx is inaccessible\n",
>  			totalused_pages, totalswap_pages);
> -
> +	}
>  	dump_zone_page_usage();
>  }