From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 011.lax.mailroute.net (011.lax.mailroute.net [199.89.1.14]) (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 CBD2626B764; Wed, 27 May 2026 01:15:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779844540; cv=none; b=dgmwLCocKU40zyzpPWKXR+1xcWtod4OdQl4dQz6+AjLxNKqtRHteNS33GM0BMgN/wS2bYG0QikEgtJiuTQG+2Q19Y3sXpcGug672OIGhtbQevfSTiQ/qkMdKkn+FkMm/KPpqDOYeeFIjqC02m6Q7XlgORG1UAnpil/ErEpNVfLQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779844540; c=relaxed/simple; bh=b35A5qZxUq6MNNo8bBuj9sTBjvapqqit5PoBBag5ZOY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=RqTQDvh0OOvar4nbtSxhpgAR0WO3IX+fDfOIP1ufVRyNiekmDhy3Mv24YoGi+pIRPpbsygeCfgR3Psu6mKE+vSORqgJdPZZ/AYeyVqLKRbPB1MU3ZG0gbuzI3dGzg3ysEtuZvgihKRhNLchZcMS0emAvcY++KNsEFmXpnFMMzxI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=4dszTYjT; arc=none smtp.client-ip=199.89.1.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="4dszTYjT" Received: from localhost (localhost [127.0.0.1]) by 011.lax.mailroute.net (Postfix) with ESMTP id 4gQBWX66T0z1XM6JN; Wed, 27 May 2026 01:15:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:content-type:content-type:in-reply-to :from:from:content-language:references:subject:subject :user-agent:mime-version:date:date:message-id:received:received; s=mr01; t=1779844532; x=1782436533; bh=JQ76c0ZKyPhJJ/YX2rWxuedO /ZUKDUPRSCpouDt6Lvk=; b=4dszTYjTwYxVzsK3EmW9I1eIh8cJav0Zmg4Fqfhk n7ad5S6m0qtboA6aELUUHk0Bmf9+W+j9opNIKiyfk+bC8Qb3Lc/nlkD6vyRe7wbU fXwsGcFzjzm5rIS+FgdgCByEX5IkJjGK/eM5WbcxqUIPjply4pF982/b8uKeH2Sh NtvGWCfKMItmhtUqIWNcJA9I0Oqq8n24Tdfm5M21Bq8fdB0ib+LQ4dubSg1na0/N PjQDFLtOr//BL6iWNAADp4KO4TYgmtmUVYssbrqlz0ZhMD/NL85WOqkHPRnKa3i8 1QaFn9ew0mcDMHLGW25DZQucxmLe2nKCKbCEQFJaJYlaTw== X-Virus-Scanned: by MailRoute Received: from 011.lax.mailroute.net ([127.0.0.1]) by localhost (011.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id MBCftocQcW0H; Wed, 27 May 2026 01:15:32 +0000 (UTC) Received: from [192.168.50.14] (c-73-231-117-72.hsd1.ca.comcast.net [73.231.117.72]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 011.lax.mailroute.net (Postfix) with ESMTPSA id 4gQBWM5yz8z1XM5jn; Wed, 27 May 2026 01:15:27 +0000 (UTC) Message-ID: <426a9687-c39e-4ac8-a406-d5e2198f01b0@acm.org> Date: Tue, 26 May 2026 18:15:24 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [f2fs-dev] [PATCH v2] f2fs: another way to set large folio by remembering inode number To: Theodore Tso , Jaegeuk Kim Cc: linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, Matthew Wilcox , linux-f2fs-devel@lists.sourceforge.net, Christoph Hellwig , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Akilesh Kailash , Christian Brauner References: <20260521155748.GA79343@macsyma-wired.lan> <20260522141115.GA8258@macsyma-wired.lan> <20260522224108.GA18663@macsyma-wired.lan> Content-Language: en-US From: Bart Van Assche In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 5/26/26 6:42 AM, Theodore Tso wrote: > 2. Host Controller Hardware Limits (UFSHCI) > > Transfer Queue Depth: A UFS controller supports a predefined > number of outstanding task request entries. This is often > hard-capped at 32 concurrent transfer requests (slots) by the > doorbell register array. The above information comes from the UFSHCI 3 standard. Jaegeuk's test setup has an UFSHCI 4.0 controller that supports one submission queue per CPU and also one completion queue per CPU. This is an architecture that is very similar but not identical to NVMe. Jaegeuk, please correct me if I got anything wrong. Bart.