From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754285AbbH0OVB (ORCPT ); Thu, 27 Aug 2015 10:21:01 -0400 Received: from mx2.suse.de ([195.135.220.15]:39491 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752406AbbH0OUs (ORCPT ); Thu, 27 Aug 2015 10:20:48 -0400 From: Vlastimil Babka To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Naoya Horiguchi , "Kirill A. Shutemov" , "Aneesh Kumar K.V" , Konstantin Khlebnikov , Vlastimil Babka Subject: [PATCH] mm, migrate: count pages failing all retries in vmstat and tracepoint Date: Thu, 27 Aug 2015 16:20:27 +0200 Message-Id: <1440685227-747-1-git-send-email-vbabka@suse.cz> X-Mailer: git-send-email 2.5.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Migration tries up to 10 times to migrate pages that return -EAGAIN until it gives up. If some pages fail all retries, they are counted towards the number of failed pages that migrate_pages() returns. They should also be counted in the /proc/vmstat pgmigrate_fail and in the mm_migrate_pages tracepoint. Signed-off-by: Vlastimil Babka --- mm/migrate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/migrate.c b/mm/migrate.c index eb42671..e705324 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1152,7 +1152,8 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page, } } } - rc = nr_failed + retry; + nr_failed += retry; + rc = nr_failed; out: if (nr_succeeded) count_vm_events(PGMIGRATE_SUCCESS, nr_succeeded); -- 2.5.0