Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios

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Subject: Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Thu, 21 Mar 2024 15:02:16 -0700
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, linux-xfs@xxxxxxxxxxxxxxx
In-reply-to: <20240321213903.GL6226@frogsfrogsfrogs>
References: <20240318224715.3367463-1-david@fromorbit.com> <20240318224715.3367463-4-david@fromorbit.com> <20240319172909.GP1927156@frogsfrogsfrogs> <ZfoEVAxVyPxqzapN@infradead.org> <20240319213827.GQ1927156@frogsfrogsfrogs> <ZfoGh53HyJuZ_2EG@infradead.org> <20240321021236.GA1927156@frogsfrogsfrogs> <20240321024005.GB1927156@frogsfrogsfrogs> <ZfymdyLxJ_-GkFji@infradead.org> <20240321213903.GL6226@frogsfrogsfrogs>

On Thu, Mar 21, 2024 at 02:39:03PM -0700, Darrick J. Wong wrote:
> 
> It turns out that merkle tree blocks are nearly "random" data, which
> means that my experiments with creating fsverity files and trying to
> compress merkle tree blocks actually made it *bigger*.  No zlib for us!

For a cryptographically secure hash, not having high entropy would be a
bad thing..

References:
- [PATCH v2 0/9] xfs: use large folios for buffers
  - From: Dave Chinner
- [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Dave Chinner
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Darrick J. Wong
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Christoph Hellwig
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Darrick J. Wong
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Christoph Hellwig
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Darrick J. Wong
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Darrick J. Wong
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Christoph Hellwig
- Re: [PATCH 3/9] xfs: convert buffer cache to use high order folios
  - From: Darrick J. Wong

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