From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="zxF6+s0S" Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D249C4; Mon, 27 Nov 2023 21:48:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=piX6sU8uUfRdM3HI4C5o5RtKyEk7LebUsWmX5nAnS9s=; b=zxF6+s0SCn2mTM1F5sDGatwdiD r+J5EdNg/JbVc8/TEwBGrSiUOrPltOv0SB5DHqEzye3x5UYQ3y43F+9CYP+YH9zZju4MAnIxN7jLr 52H6aTiRg9m6ogsTbJ455qxXjn6rKf3EheShZA+8TlQ0nbft+l3Lre4a0bU7FkEs+H18O/xb4HfZ2 DcIkdp3IB1Vc74yjq/SGmA7ZBc/H0ChYb2skCnNlw+1loprwzCvOOZXqJXWMJW983aVx/FvifwWE8 GXy6mVkavESjy4cQk0Ees741WqX1/u5t1i6oo5VnA69qG8fgQUNZnB/k4V2ZDGbJGb/SxQnB+AlVf iSo+n9HA==; Received: from hch by bombadil.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1r7qxI-004BPZ-2N; Tue, 28 Nov 2023 05:48:20 +0000 Date: Mon, 27 Nov 2023 21:48:20 -0800 From: Christoph Hellwig To: Yu Kuai Cc: Christoph Hellwig , ming.lei@redhat.com, axboe@kernel.dk, roger.pau@citrix.com, colyli@suse.de, kent.overstreet@gmail.com, joern@lazybastard.org, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, sth@linux.ibm.com, hoeppner@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, jejb@linux.ibm.com, martin.petersen@oracle.com, clm@fb.com, josef@toxicpanda.com, dsterba@suse.com, viro@zeniv.linux.org.uk, brauner@kernel.org, nico@fluxnic.net, xiang@kernel.org, chao@kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, agruenba@redhat.com, jack@suse.com, konishi.ryusuke@gmail.com, dchinner@redhat.com, linux@weissschuh.net, min15.li@samsung.com, dlemoal@kernel.org, willy@infradead.org, akpm@linux-foundation.org, hare@suse.de, p.raghav@samsung.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-bcachefs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, gfs2@lists.linux.dev, linux-nilfs@vger.kernel.org, yi.zhang@huawei.com, yangerkun@huawei.com, "yukuai (C)" Subject: Re: [PATCH block/for-next v2 01/16] block: add a new helper to get inode from block_device Message-ID: References: <20231127062116.2355129-1-yukuai1@huaweicloud.com> <20231127062116.2355129-2-yukuai1@huaweicloud.com> <6acdeece-7163-3219-95e2-827e54eadd0c@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Tue, Nov 28, 2023 at 09:35:56AM +0800, Yu Kuai wrote: > Thanks for the advice! In case I'm understanding correctly, do you mean > that all other fs/drivers that is using pages versions can safely switch > to folio versions now? If you never allocate a high-order folio pages are identical to folios. So yes, we can do folio based interfaces only, and also use that as an opportunity to convert over the callers. > By the way, my orginal idea was trying to add a new field 'bd_flags' > in block_devcie, and then add a new bit so that bio_check_ro() will > only warn once for each partition. Now that this patchset will be quite > complex, I'll add a new bool field 'bd_ro_warned' to fix the above > problem first, and then add 'bd_flags' once this patchset is done. Yes, please do a minimal version if you can find space where the rmw cycles don't cause damage to neighbouring fields. Or just leave the current set of warnings in if it's too hard.