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

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Message-ID: <70969f64-1e67-4993-b980-3e38c59196a6@linux.alibaba.com>
Date: Wed, 14 Jan 2026 17:04:03 +0800
From: Jingbo Xu <jefflexu@...ux.alibaba.com>
To: miklos@...redi.hu, joannelkoong@...il.com, linux-fsdevel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ak: fuse: fix premature writetrhough request for large
 folio



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@...r.kernel.org
> Signed-off-by: Jingbo Xu <jefflexu@...ux.alibaba.com>
> ---

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

-- 
Thanks,
Jingbo