From patchwork Mon Aug 24 08:29:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 265202 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=-13.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 95AD1C433DF for ; Mon, 24 Aug 2020 08:34:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71A3D206F0 for ; Mon, 24 Aug 2020 08:34:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598258063; bh=U3/ZBaHYO/v3cl833Rr/LLMeh0E43V8IkoRMGx8wbCM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MxISO3Bxii3FNHhJmaHTv2QW++Fbfc3lu2+ZktZJlpeH61Jix5CyNCxRlcHBFambp PS9Zoumg/gLgWHk2QqDhVDuXs9At4G5DaKnZVEIjTkf4JC68IVA1x2VHuJ1yO1qpSp XkZY3DnbpOzeu/kKkS/niUNbtff3EcZjQFc7w1DY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727905AbgHXIeU (ORCPT ); Mon, 24 Aug 2020 04:34:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:42650 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727897AbgHXIeT (ORCPT ); Mon, 24 Aug 2020 04:34:19 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AC66421741; Mon, 24 Aug 2020 08:34:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598258059; bh=U3/ZBaHYO/v3cl833Rr/LLMeh0E43V8IkoRMGx8wbCM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n1zD32rzXI1ML+NHhydhLJddoiocXJEgbzNmfalDkRL0u8uPMAGZWe4DgigsZBeaX Zt4jTmXxlQXIKGD57uK9c2SzB3VbFbiYm4vu1CFSejevnS8XPzzuERcI6W+rTR0mpd pUg+OxJXcGd9k2ZqBWKAfGWOj69nM3+wJmCLDQow= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhiguo Niu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 5.8 052/148] f2fs: should avoid inode eviction in synchronous path Date: Mon, 24 Aug 2020 10:29:10 +0200 Message-Id: <20200824082416.560602391@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200824082413.900489417@linuxfoundation.org> References: <20200824082413.900489417@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jaegeuk Kim [ Upstream commit b0f3b87fb3abc42c81d76c6c5795f26dbdb2f04b ] https://bugzilla.kernel.org/show_bug.cgi?id=208565 PID: 257 TASK: ecdd0000 CPU: 0 COMMAND: "init" #0 [] (__schedule) from [] #1 [] (schedule) from [] #2 [] (rwsem_down_read_failed) from [] #3 [] (down_read) from [] #4 [] (f2fs_truncate_blocks) from [] #5 [] (f2fs_truncate) from [] #6 [] (f2fs_evict_inode) from [] #7 [] (evict) from [] #8 [] (iput) from [] #9 [] (f2fs_sync_node_pages) from [] #10 [] (f2fs_write_checkpoint) from [] #11 [] (f2fs_sync_fs) from [] #12 [] (f2fs_do_sync_file) from [] #13 [] (f2fs_sync_file) from [] #14 [] (vfs_fsync_range) from [] #15 [] (do_fsync) from [] #16 [] (sys_fsync) from [] This can be caused by flush_dirty_inode() in f2fs_sync_node_pages() where iput() requires f2fs_lock_op() again resulting in livelock. Reported-by: Zhiguo Niu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/node.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 03e24df1c84f5..e61ce7fb0958b 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1924,8 +1924,12 @@ continue_unlock: goto continue_unlock; } - /* flush inline_data, if it's async context. */ - if (do_balance && is_inline_node(page)) { + /* flush inline_data/inode, if it's async context. */ + if (!do_balance) + goto write_node; + + /* flush inline_data */ + if (is_inline_node(page)) { clear_inline_node(page); unlock_page(page); flush_inline_data(sbi, ino_of_node(page)); @@ -1938,7 +1942,7 @@ continue_unlock: if (flush_dirty_inode(page)) goto lock_node; } - +write_node: f2fs_wait_on_page_writeback(page, NODE, true, true); if (!clear_page_dirty_for_io(page))