Hello,

> kern  :err   : [  187.461914] F2FS-fs (sda1): Swapfile does not align to 
> section

> commit 02eb84b96bc1b382dd138bf60724edbefe77b025
> Author: huangjia...@oppo.com <huangjia...@oppo.com>
> Date:   Mon Mar 1 12:58:44 2021 +0800

>     f2fs: check if swapfile is section-alligned

>     If the swapfile isn't created by pin and fallocate, it can't be
>     guaranteed section-aligned, so it may be selected by f2fs gc. When
>     gc_pin_file_threshold is reached, the address of swapfile may change,
>     but won't be synchronized to swap_extent, so swap will write to wrong
>     address, which will cause data corruption.

>     Signed-off-by: Huang Jianan <huangjia...@oppo.com>
>     Signed-off-by: Guo Weichao <guoweic...@oppo.com>
>     Reviewed-by: Chao Yu <yuch...@huawei.com>
>     Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>

The test uses fallocate to preallocate the swap file and writes zeros to
it. I'm not sure what pin refers to?

-- 
Thank you,
Richard.

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