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Date:   Thu, 20 Feb 2020 07:47:41 -0800
From:   Christoph Hellwig <>
To:     Matthew Wilcox <>
Subject: Re: [PATCH v7 21/24] iomap: Restructure iomap_readpages_actor

On Wed, Feb 19, 2020 at 01:01:00PM -0800, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <>
> By putting the 'have we reached the end of the page' condition at the end
> of the loop instead of the beginning, we can remove the 'submit the last
> page' code from iomap_readpages().  Also check that iomap_readpage_actor()
> didn't return 0, which would lead to an endless loop.

I'm obviously biassed a I wrote the original code, but I find the new
very much harder to understand (not that the previous one was easy, this
is tricky code..).

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