From patchwork Wed Sep 11 16:45:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Goldwyn Rodrigues X-Patchwork-Id: 11141573 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 13DE017E6 for ; Wed, 11 Sep 2019 16:45:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F0FBD20863 for ; Wed, 11 Sep 2019 16:45:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729250AbfIKQp2 (ORCPT ); Wed, 11 Sep 2019 12:45:28 -0400 Received: from mx2.suse.de ([195.135.220.15]:34410 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728896AbfIKQp1 (ORCPT ); Wed, 11 Sep 2019 12:45:27 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id EFFBFAF84; Wed, 11 Sep 2019 16:45:25 +0000 (UTC) From: Goldwyn Rodrigues To: linux-fsdevel@vger.kernel.org Cc: linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, hch@infradead.org, andres@anarazel.de, david@fromorbit.com, riteshh@linux.ibm.com, linux-f2fs-devel@lists.sourceforge.net, Goldwyn Rodrigues Subject: [PATCH 1/3] btrfs: fix inode rwsem regression Date: Wed, 11 Sep 2019 11:45:15 -0500 Message-Id: <20190911164517.16130-2-rgoldwyn@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190911164517.16130-1-rgoldwyn@suse.de> References: <20190911093926.pfkkx25mffzeuo32@alap3.anarazel.de> <20190911164517.16130-1-rgoldwyn@suse.de> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Goldwyn Rodrigues This is similar to 942491c9e6d6 ("xfs: fix AIM7 regression") Apparently our current rwsem code doesn't like doing the trylock, then lock for real scheme. So change our read/write methods to just do the trylock for the RWF_NOWAIT case. Fixes: edf064e7c6fe ("btrfs: nowait aio support") Signed-off-by: Goldwyn Rodrigues --- fs/btrfs/file.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 58a18ed11546..651b2b1f4219 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1893,9 +1893,10 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb, (iocb->ki_flags & IOCB_NOWAIT)) return -EOPNOTSUPP; - if (!inode_trylock(inode)) { - if (iocb->ki_flags & IOCB_NOWAIT) + if (iocb->ki_flags & IOCB_NOWAIT) { + if (!inode_trylock(inode)) return -EAGAIN; + } else { inode_lock(inode); }