From patchwork Mon Jul 19 14:48:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 481267 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E88FC07E9B for ; Mon, 19 Jul 2021 15:16:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 79BB561003 for ; Mon, 19 Jul 2021 15:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243841AbhGSOfl (ORCPT ); Mon, 19 Jul 2021 10:35:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:48094 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245683AbhGSOew (ORCPT ); Mon, 19 Jul 2021 10:34:52 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8AE7460720; Mon, 19 Jul 2021 15:14:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626707682; bh=8uZemnvQFKt9o1bGL0LRDmPh5b6BGZLo4ybnRrz28ss=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XNDvsO2i7DPelYUIPxGkPt5UlXyCx1p5nR3URA9rPa/4C4CP4G3s0Zu3dtsFkd9dd 2L10AhOzWo/LR8ULUKm7f3J4fITxmvB+iGqotoN/4lMJoeIdnK8C15pi26Y3xwDZw5 EngTrrN67T7RORGhbK+yWxqLyijO+fWzno64A+EM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhang Yi , Jan Kara , Theodore Tso Subject: [PATCH 4.14 015/315] ext4: correct the cache_nr in tracepoint ext4_es_shrink_exit Date: Mon, 19 Jul 2021 16:48:24 +0200 Message-Id: <20210719144943.379309421@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144942.861561397@linuxfoundation.org> References: <20210719144942.861561397@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Zhang Yi commit 4fb7c70a889ead2e91e184895ac6e5354b759135 upstream. The cache_cnt parameter of tracepoint ext4_es_shrink_exit means the remaining cache count after shrink, but now it is the cache count before shrink, fix it by read sbi->s_extent_cache_cnt again. Fixes: 1ab6c4997e04 ("fs: convert fs shrinkers to new scan/count API") Cc: stable@vger.kernel.org # 3.12+ Signed-off-by: Zhang Yi Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20210522103045.690103-3-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/extents_status.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -1086,6 +1086,7 @@ static unsigned long ext4_es_scan(struct nr_shrunk = __es_shrink(sbi, nr_to_scan, NULL); + ret = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt); trace_ext4_es_shrink_scan_exit(sbi->s_sb, nr_shrunk, ret); return nr_shrunk; }