From patchwork Mon Nov 4 06:26:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13860935 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 8322C18E055; Mon, 4 Nov 2024 06:27:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730701626; cv=none; b=Iyvu3uyvxrQhS52IAHlIcSh+hcj3gBnI+tCGpBqkYX6H1UKc98jg/SUpqvoZq1JFHZtCHusGoZ4fhas8vRGfVnp0h4bt85jiQfogxaijL9lHoQbEE7N2nnd8jKjfDO+ysM7tCTjhfxa6Zixew4Jb1HpI/8QUAUWR1BwOKO3lRQk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730701626; c=relaxed/simple; bh=x4pZsqaJSIM08917wBINhJVChtdoCgyHeEtOK+95nO8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RDYBUFppDJYS491NafFe7Ndbx4T3ZVfvzxABlHyJlT/VcJQy75GNR6Ld9/zgS8D/hB3URD6DUtseH9zKJzgbF/zAbIlJE8uU0Dcvu/VeFjWcoYV1vPVyyo6J1jyWYiOe13aCfnuBCgsYgdZJyW+q+llnjBqN8shZ/dFrLst1vhw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=JUw3j8vh; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="JUw3j8vh" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=1FR35fBVW6o2eMLvhGFCd1yW8PBeRzvCzSaFkrJ5xdg=; b=JUw3j8vh+gCK69iISx/CnaXE6H 6KaC+OexU3v4NTnd4CMBWUMCkdMM1+X4WL9/ZYbvUXTb82n/57+kKk3Ru9pT1dmg8FkzpccsewvkS kv1vOgOSinB9kFfwcmfOJw9plMCcQWNC3gLiqTJ9/XqBZj3bh6yFjpHWW/6/wyDa+K4OJd3cIeAfb SSOU45ywlPdc6kbWHcgWRE9NbBgRX2njyKMLxTamIKThhcj0eWNT4GBYcCTD6pXwbsFTwtPgVTjB0 iG6OB0ICKqGb3B4xSqumHjRw40jXF2vrTCfRuw2xEROWZumbJuYckKkAYaaIZgX1q2ANIte+L1y98 xeh6QxyA==; Received: from 2a02-8389-2341-5b80-c843-e027-3367-36ce.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:c843:e027:3367:36ce] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1t7qYK-0000000Cl3x-0jm6; Mon, 04 Nov 2024 06:27:04 +0000 From: Christoph Hellwig To: Jens Axboe , Chris Mason , Josef Bacik , David Sterba , Damien Le Moal Cc: linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, Damien Le Moal Subject: [PATCH 5/5] btrfs: split bios to the fs sector size boundary Date: Mon, 4 Nov 2024 07:26:33 +0100 Message-ID: <20241104062647.91160-6-hch@lst.de> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241104062647.91160-1-hch@lst.de> References: <20241104062647.91160-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Btrfs like other file systems can't really deal with I/O not aligned to it's internal block size (which strangely is called sector size in btrfs), but the block layer split helper doesn't even know about that. Round down the split boundary so that all I/Os are aligned. Fixes: d5e4377d5051 ("btrfs: split zone append bios in btrfs_submit_bio") Signed-off-by: Christoph Hellwig Reviewed-by: Damien Le Moal Reviewed-by: Johannes Thumshirn --- fs/btrfs/bio.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/bio.c b/fs/btrfs/bio.c index 0f096e226908..299b9a0ed68b 100644 --- a/fs/btrfs/bio.c +++ b/fs/btrfs/bio.c @@ -660,8 +660,15 @@ static u64 btrfs_append_map_length(struct btrfs_bio *bbio, u64 map_length) map_length = min(map_length, bbio->fs_info->max_zone_append_size); sector_offset = bio_split_rw_at(&bbio->bio, &bbio->fs_info->limits, &nr_segs, map_length); - if (sector_offset) - return sector_offset << SECTOR_SHIFT; + if (sector_offset) { + /* + * bio_split_rw_at could split at a size smaller than the + * file system sector size and thus cause unaligned I/Os. + * Fix that by always rounding down to the nearest boundary. + */ + return ALIGN_DOWN(sector_offset << SECTOR_SHIFT, + bbio->fs_info->sectorsize); + } return map_length; }