From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 E5BDE34C981 for ; Fri, 21 Nov 2025 14:30:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763735445; cv=none; b=qIc20GYZstzNq6OgBdHsafaFol7lGY9WCh5yp+Zf3z6+5iuiMIHjlZsW/LlCc8feKXNjzH4q8A7LSAou/FyeJkC1XFRLm1ftir/xe7j6sSR+7rX2ZwYlAhK7i+LCKrgXQfwktyv/pqD83OL1EAc3evyWYVeRcQ4bKk+OKKFQ8Rw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763735445; c=relaxed/simple; bh=dD9fNOpLiiMyE/GABqgpmiFCe8+xEOh3bS8WNKXt09A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=lBdkZykprFogbtylvcnB0VuoM/xzBo/QK6xuUHQy4cDsPpc9v3ssm190vUctywTqxjc28vBR2unVMzAf+0hsVpBLkf9b9TA8LIr3bOeoiaQQKRX6dEV8Fcair6rJIi2SNaXVkb14c5oZDeTI1CAVujcwwg1H/Q2mTsoIQkXH2Fc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=O22jO61B; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="O22jO61B" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=rWL9wwR2J7ur6WOaG2a8HXovHrgszFBK7WTZWMyo8ak=; b=O22jO61BxSdaC0izHP8pSZOrFO 6W8RsHSXwq1ul46hFyH40TgXN49NMB1uTyM70T2JJKnpK9DNgoRH+Z2BQ8qFX/69h4FQpuqfANAfy bjB96/02Co5+lPsVSPNcterNtTFaTojSWU9sq+Gd8m88zGVhzmx9L6sH9O0zF30TplrlA3trAYRq/ 0JHtEdZaoee1QhsCTAl7AMnv+2Ld7MQ7MB3KmDOCIvheAFlmUFQ35c8UUN26VMRTCjPLIITwT+0zN gxJdto+vYI0YyGVIk0ikxC0o9uLKxh40c4XoAc+8+kbvQhKGhMqw1wk746LWgW+GM6ZGONbLuqZ4d ZeiOSjAA==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vMS9p-00000002zZ2-1DP9; Fri, 21 Nov 2025 14:30:41 +0000 Date: Fri, 21 Nov 2025 14:30:41 +0000 From: Matthew Wilcox To: Jaegeuk Kim Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, David Hildenbrand Subject: Re: [PATCH] mm/readahead: add a desired folio order for readhead Message-ID: References: <20251121014811.1971698-1-jaegeuk@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251121014811.1971698-1-jaegeuk@kernel.org> On Fri, Nov 21, 2025 at 01:48:11AM +0000, Jaegeuk Kim wrote: > This patch adds a desired folio order in file_ra_state in order to get > non-zero-order allocation for readahead. Why? Does it not ramp up quickly enough for you? I see a lot of patches from you that say what the patch does but very little about why. Please explain yourself more.