From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2295C168A7 for ; Mon, 8 May 2023 10:38:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C313C433D2; Mon, 8 May 2023 10:38:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683542325; bh=515YoEgZZ/ABmXF/5cW49bGIDlpvMojKx5q1APCPmy8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qtr2vbxBb5l5b+M6OQbpY+3c3dDtlNcGIPpRfogUtdhTnfkg9DEzzBpQPkZ8FnhHR jYlR9Xnjv9fRM4QicNkt/mX2E+IqhiPaL+Rt32kq/3ggSMsXg5GasV9QvajfpN9f7i 04xX+loUnekL1Z0r2vxprxy6Izn8+jVr1cMqVLnU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jan Kara , Theodore Tso , Sasha Levin Subject: [PATCH 6.2 382/663] jdb2: Dont refuse invalidation of already invalidated buffers Date: Mon, 8 May 2023 11:43:28 +0200 Message-Id: <20230508094440.504340021@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094428.384831245@linuxfoundation.org> References: <20230508094428.384831245@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Jan Kara [ Upstream commit bd159398a2d2234de07d310132865706964aaaa7 ] When invalidating buffers under the partial tail page, jbd2_journal_invalidate_folio() returns -EBUSY if the buffer is part of the committing transaction as we cannot safely modify buffer state. However if the buffer is already invalidated (due to previous invalidation attempts from ext4_wait_for_tail_page_commit()), there's nothing to do and there's no point in returning -EBUSY. This fixes occasional warnings from ext4_journalled_invalidate_folio() triggered by generic/051 fstest when blocksize < pagesize. Fixes: 53e872681fed ("ext4: fix deadlock in journal_unmap_buffer()") Signed-off-by: Jan Kara Link: https://lore.kernel.org/r/20230329154950.19720-1-jack@suse.cz Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/jbd2/transaction.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 15de1385012eb..18611241f4513 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2387,6 +2387,9 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh, spin_unlock(&jh->b_state_lock); write_unlock(&journal->j_state_lock); jbd2_journal_put_journal_head(jh); + /* Already zapped buffer? Nothing to do... */ + if (!bh->b_bdev) + return 0; return -EBUSY; } /* -- 2.39.2