linux-kernel - Re: [PATCH 1/2] f2fs: improve readahead for POSIX_FADV

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Message-ID: <aXHhFN-feFYFcKYu@infradead.org>
Date: Thu, 22 Jan 2026 00:34:28 -0800
From: Christoph Hellwig <hch@...radead.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: Christoph Hellwig <hch@...radead.org>, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	Matthew Wilcox <willy@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 1/2] f2fs: improve readahead for POSIX_FADV_WILLNEED

On Fri, Nov 21, 2025 at 06:05:01PM +0000, Jaegeuk Kim wrote:
> On 11/20, Christoph Hellwig wrote:
> > On Fri, Nov 21, 2025 at 01:42:01AM +0000, Jaegeuk Kim wrote:
> > > This patch boosts readahead for POSIX_FADV_WILLNEED.
> > 
> > How?  That's not a good changelog.
> > 
> > Also open coding the read-ahead logic is not a good idea.  The only
> > f2fs-specific bits are the compression check, and the extent precaching,
> > but you surely should be able to share a read-ahead helper with common
> > code instead of duplicating the logic.
> 
> Ok, let me try to write up and post a generic version of the changes.

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