From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) (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 896E9257425; Mon, 12 May 2025 08:40:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747039210; cv=none; b=VzHqeNR/EUNrKBhuD6vU4Z0V69w8wvbg9Lz+BnSlR+9VNdpSG4fzPc0O9riv6EQEz/AaVBcBQTuEoVhIL+Ek74w01qNS1qRE0ktoLpRXF0MUvskX4/Zn2FQNYrM/l5dQVroH09b+oY8N5JilKrhO13w13N8HsovVORVAvMX7W4M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747039210; c=relaxed/simple; bh=RPpcKr3DP9NwB+Sbz6dHBo5aOQLnnRLsmP85eJNTF5c=; h=Subject:To:Cc:References:From:Message-ID:Date:MIME-Version: In-Reply-To:Content-Type; b=Z6ghNR1CFs4fpLMp2xP+x7TCsB1MVePZYiQjR65a8Sv0Bq1jTDwq/FLXi4qrwJ1ZK5zaAbkn2zImVGMzlRC3KC2k2XuBOp9y3tsdPjyQ5Pf4qAOMr31S0ESe/A/cxt+IOh+dEIGQfp9i3ueo+sRXlnOpmGpCay1lSfcz8cd6KTA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4ZwtMJ1V63z4f3jdD; Mon, 12 May 2025 16:39:40 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id D4CB41A1648; Mon, 12 May 2025 16:40:04 +0800 (CST) Received: from [10.174.179.143] (unknown [10.174.179.143]) by APP4 (Coremail) with SMTP id gCh0CgCnCl_isyFoe0i0MA--.54727S3; Mon, 12 May 2025 16:40:04 +0800 (CST) Subject: Re: [PATCH RFC md-6.16 v3 00/19] md: introduce a new lockless bitmap To: Christoph Hellwig , Yu Kuai Cc: xni@redhat.com, colyli@kernel.org, agk@redhat.com, snitzer@kernel.org, mpatocka@redhat.com, song@kernel.org, linux-kernel@vger.kernel.org, dm-devel@lists.linux.dev, linux-raid@vger.kernel.org, yi.zhang@huawei.com, yangerkun@huawei.com, johnny.chenyi@huawei.com, "yukuai (C)" References: <20250512011927.2809400-1-yukuai1@huaweicloud.com> <20250512052118.GA1796@lst.de> From: Yu Kuai Message-ID: <6aeecf3e-2f24-7d30-8462-c8d30b197740@huaweicloud.com> Date: Mon, 12 May 2025 16:40:02 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <20250512052118.GA1796@lst.de> Content-Type: text/plain; charset=gbk; format=flowed Content-Transfer-Encoding: 8bit X-CM-TRANSID:gCh0CgCnCl_isyFoe0i0MA--.54727S3 X-Coremail-Antispam: 1UD129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73 VFW2AGmfu7bjvjm3AaLaJ3UjIYCTnIWjp_UUUYN7AC8VAFwI0_Gr0_Xr1l1xkIjI8I6I8E 6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28Cjx kF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8I cVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87 Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE 6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVW8JVWxJwAm72 CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IY64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4II rI8v6xkF7I0E8cxan2IY04v7Mxk0xIA0c2IEe2xFo4CEbIxvr21l42xK82IYc2Ij64vIr4 1l4c8EcI0Ec7CjxVAaw2AFwI0_Jw0_GFyl4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAq x4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r 43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF 7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxV W8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7V Ub7GYJUUUUU== X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ Hi, ÔÚ 2025/05/12 13:21, Christoph Hellwig дµÀ: >>>From looking over the patches this entirely dropped support for bitmap > files for now. Do you plan to get back to those? I don't have such plan for now, actually I tend to remove bitmap file, once llbitmap is ready with lightweight overhead, I expect perforamce can be better than old bitmap with bitmap file. If there are cases that llbitmap performace is still much worse than none bitmap, and bitmap file can reduce the gap, we'll probable think about bitmap file again. Thanks, Kuai > > . >