linux-kernel - Re: [PATCH] mm/readahead: add a desired folio order for readhead

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Message-ID: <aSCpgMvrvA_hR4VB@google.com>
Date: Fri, 21 Nov 2025 18:03:44 +0000
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Matthew Wilcox <willy@...radead.org>
Cc: linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
	David Hildenbrand <david@...hat.com>
Subject: Re: [PATCH] mm/readahead: add a desired folio order for readhead

On 11/21, Matthew Wilcox wrote:
> 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.

Yeah, let me revisit the patches and post another version that uplifts
code into mm/fs with what I'm trying to address.