>
> Pankaj reports that starting with commit ad428cdb525a "dax: Check the
> end of the block-device capacity with dax_direct_access()" device-mapper
> no longer allows dax operation. This results from the stricter checks in
> __bdev_dax_supported() that validate that the start and end of a
> block-device map to the same 'pagemap' instance.
>
> Teach the dax-core and device-mapper to validate the 'pagemap' on a
> per-target basis. This is accomplished by refactoring the
> bdev_dax_supported() internals into generic_fsdax_supported() which
> takes a sector range to validate. Consequently generic_fsdax_supported()
> is suitable to be used in a device-mapper ->iterate_devices() callback.
> A new ->dax_supported() operation is added to allow composite devices to
> split and route upper-level bdev_dax_supported() requests.
>
> Fixes: ad428cdb525a ("dax: Check the end of the block-device...")
> Cc: <[email protected]>
> Cc: Jan Kara <[email protected]>
> Cc: Ira Weiny <[email protected]>
> Cc: Dave Jiang <[email protected]>
> Cc: Mike Snitzer <[email protected]>
> Cc: Keith Busch <[email protected]>
> Cc: Matthew Wilcox <[email protected]>
> Cc: Vishal Verma <[email protected]>
> Cc: Heiko Carstens <[email protected]>
> Cc: Martin Schwidefsky <[email protected]>
> Reported-by: Pankaj Gupta <[email protected]>
> Signed-off-by: Dan Williams <[email protected]>
Thank you for the patch. Looks good to me.
I also tested the patch and it works well.
Reviewed-and-Tested-by: Pankaj Gupta <[email protected]>
Best regards,
Pankaj
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