X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fosc%2Fosc_page.c;h=fd4c1f302102a7fab73cd260d597d7bb8e303f28;hb=c524079f4f59a39b99467d9868ee4aafdcf033e9;hp=fa5d86e0f2ea4e798998c215d35b3c86016ee339;hpb=99e6bc29a437cac43fee499d6f9a2c17854468ee;p=fs%2Flustre-release.git

diff --git a/lustre/osc/osc_page.c b/lustre/osc/osc_page.c
index fa5d86e..fd4c1f3 100644
--- a/lustre/osc/osc_page.c
+++ b/lustre/osc/osc_page.c
@@ -539,8 +539,13 @@ static inline bool lru_page_busy(struct client_obd *cli, struct cl_page *page)
 	if (cli->cl_cache->ccc_unstable_check) {
 		struct page *vmpage = cl_page_vmpage(page);
 
-		/* vmpage have two known users: cl_page and VM page cache */
-		if (page_count(vmpage) - page_mapcount(vmpage) > 2)
+		/* this check is racy because the vmpage is not locked, but
+		 * that's OK - the code which does the actual page release
+		 * checks this again before releasing
+		 *
+		 * vmpage have two known users: cl_page and VM page cache
+		 */
+		if (vmpage_in_use(vmpage, 0))
 			return true;
 	}
 	return false;