X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fllite%2Fvvp_dev.c;h=7db2a47185234d2709e63b06486062aa06a2f406;hb=d106dfc1458702865118e73bfcdfc2ec2676a7d6;hp=4ded8b49ac15e9b0131b8a76458810762cc17676;hpb=783002035ae9612b5b0aa80f2342a2ee9e81c374;p=fs%2Flustre-release.git

diff --git a/lustre/llite/vvp_dev.c b/lustre/llite/vvp_dev.c
index 4ded8b4..7db2a47 100644
--- a/lustre/llite/vvp_dev.c
+++ b/lustre/llite/vvp_dev.c
@@ -268,6 +268,18 @@ struct lu_device_type vvp_device_type = {
 #ifndef HAVE_ACCOUNT_PAGE_DIRTIED_EXPORT
 unsigned int (*vvp_account_page_dirtied)(struct page *page,
 					 struct address_space *mapping);
+
+unsigned int ll_account_page_dirtied(struct page *page,
+				     struct address_space *mapping)
+{
+	/* must use __set_page_dirty, which means unlocking and
+	 * relocking, which hurts performance.
+	 */
+	ll_xa_unlock(&mapping->i_pages);
+	__set_page_dirty(page, mapping, 0);
+	ll_xa_lock(&mapping->i_pages);
+	return 0;
+}
 #endif
 
 /**
@@ -292,6 +304,8 @@ int vvp_global_init(void)
 	 */
 	vvp_account_page_dirtied = (void *)
 		cfs_kallsyms_lookup_name("account_page_dirtied");
+	if (!vvp_account_page_dirtied)
+		vvp_account_page_dirtied = ll_account_page_dirtied;
 #endif
 
 	return 0;