Commit 5f355571 authored Dec 04, 2019 by Faiyaz Mohammed Committed by Prakash Gupta Jul 15, 2020

mm: page_alloc: Add debug log in free_reserved_area for static memory



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 memblock_dbg log in "free_reserved_area".
After adding log:
[    0.294837] memblock_free: [0x00000083600000-0x00000083603000] free_initrd_mem+0x20/0x28
[    0.294848] Freeing initrd memory: 12K.
[    0.695246] memblock_free: [0x00000081600000-0x00000081a00000] free_initmem+0x70/0xc8
[    0.696688] Freeing unused kernel memory: 4096K.

Change-Id: I5ebbb9c1ced481e0ce2acd839e85526aa8dadf75
Signed-off-by: Faiyaz Mohammed <faiyazm@codeaurora.org>

parent 2f9b2b41

mm/page_alloc.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -7665,6 +7665,11 @@ unsigned long free_reserved_area(void start, void end, int poison, const char
		pr_info("Freeing %s memory: %ldK\n",
		s, pages << (PAGE_SHIFT - 10));

		#ifdef CONFIG_HAVE_MEMBLOCK
		memblock_dbg("memblock_free: [%#016llx-%#016llx] %pS\n",
		__pa(start), __pa(end), (void *)_RET_IP_);
		#endif

		return pages;
		}
		EXPORT_SYMBOL_GPL(free_reserved_area);