From mboxrd@z Thu Jan 1 00:00:00 1970 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=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=no 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 D1903C433E4 for ; Mon, 24 Aug 2020 20:09:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 768C7207DF for ; Mon, 24 Aug 2020 20:09:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="oVb0YTnf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 768C7207DF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D1B178D0006; Mon, 24 Aug 2020 16:09:28 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CCA368D0003; Mon, 24 Aug 2020 16:09:28 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C07798D0006; Mon, 24 Aug 2020 16:09:28 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0052.hostedemail.com [216.40.44.52]) by kanga.kvack.org (Postfix) with ESMTP id A981A8D0003 for ; Mon, 24 Aug 2020 16:09:28 -0400 (EDT) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 4EEB43628 for ; Mon, 24 Aug 2020 20:09:28 +0000 (UTC) X-FDA: 77186552016.23.fowl24_060d6f427055 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin23.hostedemail.com (Postfix) with ESMTP id 1978837608 for ; Mon, 24 Aug 2020 20:09:28 +0000 (UTC) X-HE-Tag: fowl24_060d6f427055 X-Filterd-Recvd-Size: 2207 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Mon, 24 Aug 2020 20:09:27 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (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 557512067C; Mon, 24 Aug 2020 20:09:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598299766; bh=Fo2SRSPedysLovKtNIgg+PCgYoeSknIuP8nfThruowM=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=oVb0YTnfyZktyEkeLYGcaehsAloadoiqjiEyq2xIr6VwObSpc4zR8yb410HYYWTdH uU4whUU553p+EW7Wf3qYRu0s4ZTc9ImbYVY7ZFFqrw5a6+n8iKhlAwkYzrAhZAzB9z ZyCibojd1hEhPqETi09r1BZKK35oT22KKqE1hdbc= Date: Mon, 24 Aug 2020 13:09:25 -0700 From: Andrew Morton To: Yafang Shao Cc: david@fromorbit.com, hch@infradead.org, darrick.wong@oracle.com, willy@infradead.org, mhocko@kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v6 2/2] xfs: avoid transaction reservation recursion Message-Id: <20200824130925.a3d2d2b75ac3a6b4eba72fb9@linux-foundation.org> In-Reply-To: <20200824014234.7109-3-laoar.shao@gmail.com> References: <20200824014234.7109-1-laoar.shao@gmail.com> <20200824014234.7109-3-laoar.shao@gmail.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 1978837608 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 24 Aug 2020 09:42:34 +0800 Yafang Shao wrote: > --- a/include/linux/iomap.h > +++ b/include/linux/iomap.h > @@ -271,4 +271,11 @@ int iomap_swapfile_activate(struct swap_info_struct *sis, > # define iomap_swapfile_activate(sis, swapfile, pagespan, ops) (-EIO) > #endif /* CONFIG_SWAP */ > > +/* Use the journal_info to indicate current is in a transaction */ > +static inline bool > +fstrans_context_active(void) > +{ > + return current->journal_info != NULL; > +} Why choose iomap.h for this?