Re: [PATCH v2] mm: page_alloc: Add debug log in free_reserved_area for static memory

[Faiyaz Mohammed]

Please ignore this patch.

On 10/11/2021 12:25 PM, Faiyaz Mohammed wrote:
> From: Faiyaz Mohammed <faiyazm@xxxxxxxxxxxxxx>
> 
> For INITRD and initmem memory is reserved through "memblock_reserve"
> during boot up but it is free via "free_reserved_area" instead
> of "memblock_free".
> For example:
> [    0.294848] Freeing initrd memory: 12K.
> [    0.696688] Freeing unused kernel memory: 4096K.
> 
> To get the start and end address of the above freed memory and to account
> proper memblock added pr_debug log in "free_reserved_area".
> After adding log:
> [    0.294837] 0x00000083600000-0x00000083603000 free_initrd_mem+0x20/0x28
> [    0.294848] Freeing initrd memory: 12K.
> [    0.695246] 0x00000081600000-0x00000081a00000 free_initmem+0x70/0xc8
> [    0.696688] Freeing unused kernel memory: 4096K.
> 
> Signed-off-by: Faiyaz Mohammed <faiyazm@xxxxxxxxxxxxxx>
> ---
>  mm/page_alloc.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 668edb1..8a1929d4 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -8153,6 +8153,11 @@ unsigned long free_reserved_area(void *start, void *end, int poison, const char
>  	if (pages && s)
>  		pr_info("Freeing %s memory: %ldK\n", s, K(pages));
>  
> +#ifdef CONFIG_HAVE_MEMBLOCK
> +		memblock_dbg("memblock_free: [%#016llx-%#016llx] %pS\n",
> +			__pa(start), __pa(end), (void *)_RET_IP_);
> +#endif
> +
>  	return pages;
>  }
>  
>