[PATCH] mm/softoffline: Add page flag description in error paths

[Anshuman Khandual]

It helps to provide page flag description along with the raw value in
error paths during soft offline process. From sample experiments

Before the patch:

[  132.317977] soft offline: 0x6100: migration failed 1, type 3ffff800008018
[  132.359057] soft offline: 0x7400: migration failed 1, type 3ffff800008018

After the patch:

[   87.694325] soft offline: 0x5900: migration failed 1, type 3ffff800008018 
(uptodate|dirty|head)
[   87.736273] soft offline: 0x6c00: migration failed 1, type 3ffff800008018 
(uptodate|dirty|head)

Signed-off-by: Anshuman Khandual <khand...@linux.vnet.ibm.com>
---
 mm/memory-failure.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 27f7210..fe64d77 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1543,8 +1543,8 @@ static int get_any_page(struct page *page, unsigned long 
pfn, int flags)
                if (ret == 1 && !PageLRU(page)) {
                        /* Drop page reference which is from __get_any_page() */
                        put_hwpoison_page(page);
-                       pr_info("soft_offline: %#lx: unknown non LRU page type 
%lx\n",
-                               pfn, page->flags);
+                       pr_info("soft_offline: %#lx: unknown non LRU page type 
%lx (%pGp)\n",
+                               pfn, page->flags, &page->flags);
                        return -EIO;
                }
        }
@@ -1585,8 +1585,8 @@ static int soft_offline_huge_page(struct page *page, int 
flags)
        ret = migrate_pages(&pagelist, new_page, NULL, MPOL_MF_MOVE_ALL,
                                MIGRATE_SYNC, MR_MEMORY_FAILURE);
        if (ret) {
-               pr_info("soft offline: %#lx: migration failed %d, type %lx\n",
-                       pfn, ret, page->flags);
+               pr_info("soft offline: %#lx: migration failed %d, type %lx 
(%pGp)\n",
+                       pfn, ret, page->flags, &page->flags);
                /*
                 * We know that soft_offline_huge_page() tries to migrate
                 * only one hugepage pointed to by hpage, so we need not
@@ -1677,14 +1677,14 @@ static int __soft_offline_page(struct page *page, int 
flags)
                        if (!list_empty(&pagelist))
                                putback_movable_pages(&pagelist);
 
-                       pr_info("soft offline: %#lx: migration failed %d, type 
%lx\n",
-                               pfn, ret, page->flags);
+                       pr_info("soft offline: %#lx: migration failed %d, type 
%lx (%pGp)\n",
+                               pfn, ret, page->flags, &page->flags);
                        if (ret > 0)
                                ret = -EIO;
                }
        } else {
-               pr_info("soft offline: %#lx: isolation failed: %d, page count 
%d, type %lx\n",
-                       pfn, ret, page_count(page), page->flags);
+               pr_info("soft offline: %#lx: isolation failed: %d, page count 
%d, type %lx (%pGp)\n",
+                       pfn, ret, page_count(page), page->flags, &page->flags);
        }
        return ret;
 }
-- 
1.8.5.2