Re: [PATCH] f2fs: preserve 64-bit FITRIM minimum lengths

[Chao Yu]

On 11/1/26 07:39, Hungyu Lin wrote:
> The FITRIM minimum length is a 64-bit byte count. f2fs_ioc_fitrim()
> narrows it to unsigned int while applying the device granularity, so a
> minimum of 4 GiB becomes the device granularity. fstrim can consequently
> discard free extents smaller than the requested minimum.
>
> Use u64 when applying the device granularity. The checkpoint's
> trim_minlen already retains the 64-bit block count; also widen the
> discard policy field and its initializer argument so larger minimums
> are not truncated when passed to the issue and wait paths.

Cc: stable@xxxxxxxxxxxxxxx

> Fixes: 4b2fecc84655 ("f2fs: introduce FITRIM in f2fs_ioctl")
> Signed-off-by: Hungyu Lin <dennylin0707@xxxxxxxxx>

Reviewed-by: Chao Yu <chao@xxxxxxxxxx>

Thanks,