From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Date: Thu, 29 Nov 2012 03:17:10 +0000 (+1100)
Subject: mm: print out information of file affected by memory error
X-Git-Tag: next-20121205~1^2~352
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1b6ef9f40253ea7befe68c42c14514944e6d2b18;p=karo-tx-linux.git

mm: print out information of file affected by memory error

Printing out the information about which file can be affected by a memory
error in generic_error_remove_page() is helpful for user to estimate the
impact of the error.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "Jun'ichi Nomura" <j-nomura@ce.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/truncate.c b/mm/truncate.c
index d51ce92d6e83..db1b21666b09 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -151,14 +151,20 @@ int truncate_inode_page(struct address_space *mapping, struct page *page)
  */
 int generic_error_remove_page(struct address_space *mapping, struct page *page)
 {
+	struct inode *inode;
+
 	if (!mapping)
 		return -EINVAL;
+	inode = mapping->host;
 	/*
 	 * Only punch for normal data pages for now.
 	 * Handling other types like directories would need more auditing.
 	 */
-	if (!S_ISREG(mapping->host->i_mode))
+	if (!S_ISREG(inode->i_mode))
 		return -EIO;
+	pr_info("MCE %#lx: file info pgoff:%lu, inode:%lu, dev:%s\n",
+		page_to_pfn(page), page_index(page),
+		inode->i_ino, inode->i_sb->s_id);
 	return truncate_inode_page(mapping, page);
 }
 EXPORT_SYMBOL(generic_error_remove_page);