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 ABFB63C47B for ; Tue, 1 Jul 2025 03:01:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751338887; cv=none; b=mT19fFdv5adRqdFUwAYacZA2mbwbtYPi+GPw3oaxG3tdmdMtoK84L0KUF/EENraZbTAaH/6K7bfCljWn1qfFVIXKpnAm1cM8GNX32JuOlC1Zqj2qrFPIbc3OBo7O+BigajsKoNVtimT++u7hHvEDh3CB45hJ5ZIYzMxVgWVuKhU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751338887; c=relaxed/simple; bh=hdnApl4/Gk5OHftwPeg37vTcl2zebPR9fDoMLMAMFxY=; h=Message-ID:Date:MIME-Version:Cc:Subject:To:References:From: In-Reply-To:Content-Type; b=Ni8wf4TsL5tCZsHbzPazHIXw7c5l2rEiMWz26Jjqzrfy5tFjJ4BCpS/TgxasbH8HosfJsdG+tRU+AWvNn0PcdN8UilpEsUbeEvjjyn1q4npHX061HoiUkcT2S3kzA1vmaJpWUb63GV6H2t3UpqPGTJlWNh0RvZT5dvHz4Gkl0GU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jvxGnFJT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jvxGnFJT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DED6CC4CEE3; Tue, 1 Jul 2025 03:01:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751338887; bh=hdnApl4/Gk5OHftwPeg37vTcl2zebPR9fDoMLMAMFxY=; h=Date:Cc:Subject:To:References:From:In-Reply-To:From; b=jvxGnFJT5tW0hbt0rkiFLAohxHl7f5GP4w7pyytqpGcRbYJk6bAg3Kr/PytlY2bUO w7rJGMcTmMCkCYlIhyoGFvlnZIfNOUagOzsM8fv4HrVPAmhh2j7Z1eGgqn66JR1a3t +OOFBBQcEYt0VjiC4Bk9mLb58e1hK4u+rxNNctZ56OVmZ5wPnRgxyXi/a2E6c+dEOP J6Fhs/ldO12ZyzOeE1M9V0N6QoqIv+7okmUZybTIJyIU68qjOif81F0zLoP54dWmMK r8z96eqrnSUdC6Ep1NmP0fdk6EhOu3t6llyLmgdhVVhZxjl1DnBMXVGPjY2dpr/QSn gpsAHj26ZUqKQ== Message-ID: Date: Tue, 1 Jul 2025 11:01:24 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: chao@kernel.org, wanghui33@xiaomi.com, linux-kernel@vger.kernel.org, Sheng Yong Subject: Re: [PATCH v4] f2fs: avoid splitting bio when reading multiple pages To: Jianan Huang , linux-f2fs-devel@lists.sourceforge.net, jaegeuk@kernel.org References: <20250630125753.650630-1-huangjianan@xiaomi.com> Content-Language: en-US From: Chao Yu In-Reply-To: <20250630125753.650630-1-huangjianan@xiaomi.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/30/25 20:57, Jianan Huang wrote: > When fewer pages are read, nr_pages may be smaller than nr_cpages. Due > to the nr_vecs limit, the compressed pages will be split into multiple > bios and then merged at the block level. In this case, nr_cpages should > be used to pre-allocate bvecs. > To handle this case, align max_nr_pages to cluster_size, which should be > enough for all compressed pages. > > Signed-off-by: Jianan Huang > Signed-off-by: Sheng Yong Reviewed-by: Chao Yu Thanks,