Re: [PATCH] ak: fuse: fix premature writetrhough request for large folio

From: Jingbo Xu

Date: Wed Jan 14 2026 - 04:04:12 EST




On 1/14/26 1:56 PM, Jingbo Xu wrote:
> When large folio is enabled and the initial folio offset exceeds
> PAGE_SIZE, e.g. the position resides in the second page of a large
> folio, after the folio copying the offset (in the page) won't be updated
> to 0 even though the expected range is successfully copied until the end
> of the folio. In this case fuse_fill_write_pages() exits prematurelly
> before the request has reached the max_write/max_pages limit.
>
> Fix this by eliminating page offset entirely and use folio offset
> instead.
>
> Fixes: d60a6015e1a2 ("fuse: support large folios for writethrough writes")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Jingbo Xu <jefflexu@xxxxxxxxxxxxxxxxx>
> ---

Sorry I will drop the incorrect prefix of the subject line later in v2
leaving some time for more feedbacks.

--
Thanks,
Jingbo