+ mm-page_alloc-add-debug-log-in-free_reserved_area-for-static-memory.patch added to -mm tree

+ mm-page_alloc-add-debug-log-in-free_reserved_area-for-static-memory.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: page_alloc: add debug log in free_reserved_area for static memory
has been added to the -mm tree.  Its filename is
     mm-page_alloc-add-debug-log-in-free_reserved_area-for-static-memory.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-add-debug-log-in-free_reserved_area-for-static-memory.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-add-debug-log-in-free_reserved_area-for-static-memory.patch

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------------------------------------------------------
From: Faiyaz Mohammed <faiyazm@codeaurora.org>
Subject: 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 pr_debug log in "free_reserved_area".  After adding
log:

[    0.294848] Freeing initrd memory: 12K.
[    0.294837] 0x00000083600000-0x00000083603000 free_initrd_mem+0x20/0x28
[    0.696688] Freeing unused kernel memory: 4096K.
[    0.695246] 0x00000081600000-0x00000081a00000 free_initmem+0x70/0xc8

Link: https://lkml.kernel.org/r/1634540053-23304-1-git-send-email-faiyazm@codeaurora.org
Signed-off-by: Faiyaz Mohammed <faiyazm@codeaurora.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Prakash Gupta <guptap@codeaurora.org>
Cc: Mike Rapoport <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/mm/page_alloc.c~mm-page_alloc-add-debug-log-in-free_reserved_area-for-static-memory
+++ a/mm/page_alloc.c
@@ -8118,6 +8118,8 @@ EXPORT_SYMBOL(adjust_managed_page_count)
 
 unsigned long free_reserved_area(void *start, void *end, int poison, const char *s)
 {
+	const phys_addr_t pstart = __pa(start);
+	const phys_addr_t pend = __pa(end);
 	void *pos;
 	unsigned long pages = 0;
 
@@ -8146,8 +8148,10 @@ unsigned long free_reserved_area(void *s
 		free_reserved_page(page);
 	}
 
-	if (pages && s)
+	if (pages && s) {
 		pr_info("Freeing %s memory: %ldK\n", s, K(pages));
+		pr_debug("[%pa-%pa] %pS\n", &pstart, &pend, (void *)_RET_IP_);
+	}
 
 	return pages;
 }
_

Patches currently in -mm which might be from faiyazm@codeaurora.org are

mm-page_alloc-add-debug-log-in-free_reserved_area-for-static-memory.patch