Re: [PATCH] iomap: iomap_bmap should accept unwritten maps

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On 8/25/20 4:10 PM, Yuxuan Shui wrote:
Hi,

On Tue, Aug 25, 2020 at 11:20 AM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:

On Tue, Aug 25, 2020 at 10:26:14AM +0100, Yuxuan Shui wrote:
Hi,

Do we actually want to fix this bug or not? There are a number of
people actually seeing this bug.

bmap should not succeed for unwritten extents.

Why not? Unwritten extents are still allocated extents.


If you think this is not the right fix, what do you think we should
do? If the correct fix is to make ext4 use iomap_swapfile_activate,
maybe we should CC the ext4 people too?

Yes, ext4 should use iomap_swapfile_activate.

OK, let me CC the ext4 people.

Context:

https://bugzilla.kernel.org/show_bug.cgi?id=207585

Thanks for adding ext4 list. Noticed this report for the first time now.
Maybe I missed it from fsdevel. Let me have a look at it.

-ritesh



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