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SubjectRe: [PATCH 1/2] f2fs: use IPU for cold files
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On 2017/8/8 9:42, Jaegeuk Kim wrote:
> We expect cold files write data sequentially, but sometimes some of small data
> can be updated, which incurs fragmentation.
> Let's avoid that.
>
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,

> ---
> fs/f2fs/segment.h | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
> index 6b871b492fd5..7f700e54b77d 100644
> --- a/fs/f2fs/segment.h
> +++ b/fs/f2fs/segment.h
> @@ -577,6 +577,10 @@ static inline bool need_inplace_update_policy(struct inode *inode,
> if (test_opt(sbi, LFS))
> return false;
>
> + /* if this is cold file, we should overwrite to avoid fragmentation */
> + if (file_is_cold(inode))
> + return true;
> +
> if (policy & (0x1 << F2FS_IPU_FORCE))
> return true;
> if (policy & (0x1 << F2FS_IPU_SSR) && need_SSR(sbi))
>

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