Re: [PATCH v2 3/4] hugetlbfs: improve read HWPOISON hugepage

[Naoya Horiguchi]

On Fri, Jun 23, 2023 at 04:40:14PM +0000, Jiaqi Yan wrote:
> When a hugepage contains HWPOISON pages, read() fails to read any byte
> of the hugepage and returns -EIO, although many bytes in the HWPOISON
> hugepage are readable.
> 
> Improve this by allowing hugetlbfs_read_iter returns as many bytes as
> possible. For a requested range [offset, offset + len) that contains
> HWPOISON page, return [offset, first HWPOISON page addr); the next read
> attempt will fail and return -EIO.
> 
> Signed-off-by: Jiaqi Yan <jiaqiyan@xxxxxxxxxx>

Looks good to me.

Reviewed-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>