From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.parknet.co.jp (mail.parknet.co.jp [210.171.160.6]) (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 9104E35676B; Sun, 11 Oct 2026 18:55:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.171.160.6 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791744950; cv=none; b=r5g3BuarFFCK9r3JjcVW+eok48AWAaYRLvstbi6mC0XgqNW0hZrfQ4UU53X2+hWtCteCWCjaSgmji6uaVnqCHCzFUEZQ8opRAxPZrIOBMCrvxMI35hyYwo1YM8m5eIUE1wifGgHWt7od3athVJJS2zNx6EypJK0RC2LETWcvpZM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791744950; c=relaxed/simple; bh=AICaXSSwbflJCI5kz780Q0B9PDyUAs/MpxyuhALtp9w=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=H11V7cr7e3AGmXuRsgs4oFifEJsmjdfljusqRWFpe3bSOroWBZhT7tONGqjcgDqFoBSJ/nQtk4HALdTJeH5o1MCRnBoFlNjsId8rL9T/Krk5Bu8wWMHgmpiJAUFL4DrXYQw+iNPpeEF+/XG0eMZi9DtE+CtcFWCOXbKTksgM71I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mail.parknet.co.jp; spf=pass smtp.mailfrom=parknet.co.jp; dkim=pass (2048-bit key) header.d=parknet.co.jp header.i=@parknet.co.jp header.b=HiwBKg30; dkim=permerror (0-bit key) header.d=parknet.co.jp header.i=@parknet.co.jp header.b=rzCHXli3; arc=none smtp.client-ip=210.171.160.6 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mail.parknet.co.jp Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=parknet.co.jp Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=parknet.co.jp header.i=@parknet.co.jp header.b="HiwBKg30"; dkim=permerror (0-bit key) header.d=parknet.co.jp header.i=@parknet.co.jp header.b="rzCHXli3" Received: from ibmpc.myhome.or.jp (server.parknet.ne.jp [210.171.168.39]) by mail.parknet.co.jp (Postfix) with ESMTPSA id 9A1F326F7695; Mon, 12 Oct 2026 03:55:42 +0900 (JST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=parknet.co.jp; s=20250114; t=1791744942; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=QiwgYqFdrZhXQrXzsN765LjWb+cNRzsxePPe13rYQfM=; b=HiwBKg30Jmn8JKpwm4xhDXhRmfEUoQ6UUKQukB+AHF7+Q7h+UcVsbJ+3IObZkSCLbIKTf3 X8ikFUx8g0iHWpyQiZjUjztiSmoxuE/hU4H/Wlo8t5IdKHMqHHAPn+ooooazXjdra5MgEK zGAfKVBd0dphPzAOYXqe9raszc7atINZ3a44stglKpMzHsJwco+J2CR/KTkf/A7Qm84lGA tmtuGUedUJZPzIhgReQDNmMq5AI9A5ryK1yHzximsZxvcQefC3dhW+4vLPV5z1U/VA3H7G n3LR/zXcCbESPOfF2uOckFTS+hKiTuuSYa78kXYLZtMtihhJsQKL1WLQBIDkfQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=parknet.co.jp; s=20250114-ed25519; t=1791744942; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=QiwgYqFdrZhXQrXzsN765LjWb+cNRzsxePPe13rYQfM=; b=rzCHXli3Qjt1Z+ISwy3CsT+2zU1l+wv6t02z4lDTQiHFg5l/DZxHk1bsB27NSpqzukC/pE 5pV0fOJvSyPBUpDA== Received: from devron.myhome.or.jp (devron.myhome.or.jp [192.168.0.3]) by ibmpc.myhome.or.jp (Postfix) with ESMTPS id D7637E00134; Mon, 12 Oct 2026 03:55:41 +0900 (JST) Received: by devron.myhome.or.jp (Postfix, from userid 1000) id C3B6022000EE; Mon, 12 Oct 2026 03:55:41 +0900 (JST) From: OGAWA Hirofumi To: Matheus Alves de Almeida Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] fat: allocate multiple clusters in fallocate In-Reply-To: <20261008020941.55784-1-matheus.aalmeida@inf.ufrgs.br> References: <20261008020941.55784-1-matheus.aalmeida@inf.ufrgs.br> Date: Mon, 12 Oct 2026 03:55:41 +0900 Message-ID: <874iesm5hu.fsf@mail.parknet.co.jp> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Matheus Alves de Almeida writes: > Hi, > > This series adds support for allocating multiple clusters in a single > fat_add_clusters() call in fat_fallocate(). > > The multi-cluster TODO in inode.c is not implemented, as doing so would > require speculative preallocation or an iomap conversion. Is this to improve the performance of fallocate? If so, what the number by improved bench or such? > Matheus Alves de Almeida (4): > fat: remove cluster allocation size limit > fat: return only first cluster when allocating > fat: support adding multiple clusters > fat: allocate multiple clusters in fallocate > > fs/fat/dir.c | 20 +++++++++++++++- > fs/fat/fat.h | 4 ++-- > fs/fat/fatent.c | 61 ++++++++++++++++++++++++++++++++----------------- > fs/fat/file.c | 10 ++++---- > fs/fat/inode.c | 8 +++---- > 5 files changed, 69 insertions(+), 34 deletions(-) -- OGAWA Hirofumi