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SubjectRe: [f2fs-dev] [PATCH 1/2] f2fs: speed up gc_urgent mode with SSR
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On 2017/9/10 3:17, Jaegeuk Kim wrote:
> From: Jaegeuk Kim <jaegeuk@google.com>
>
> This patch activates SSR in gc_urgent mode.
>
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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

> ---
> fs/f2fs/f2fs.h | 1 +
> fs/f2fs/segment.c | 15 +++++++++++++++
> fs/f2fs/segment.h | 13 -------------
> 3 files changed, 16 insertions(+), 13 deletions(-)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index c0803b1873b3..9a7c90386947 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -2511,6 +2511,7 @@ void destroy_node_manager_caches(void);
> /*
> * segment.c
> */
> +bool need_SSR(struct f2fs_sb_info *sbi);
> void register_inmem_page(struct inode *inode, struct page *page);
> void drop_inmem_pages(struct inode *inode);
> void drop_inmem_page(struct inode *inode, struct page *page);
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 9e708e525ba8..f96e61e8ddf7 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -168,6 +168,21 @@ static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
> return result - size + __reverse_ffz(tmp);
> }
>
> +bool need_SSR(struct f2fs_sb_info *sbi)
> +{
> + int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
> + int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
> + int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
> +
> + if (test_opt(sbi, LFS))
> + return false;
> + if (sbi->gc_thread && sbi->gc_thread->gc_urgent)
> + return true;
> +
> + return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
> + 2 * reserved_sections(sbi));
> +}
> +
> void register_inmem_page(struct inode *inode, struct page *page)
> {
> struct f2fs_inode_info *fi = F2FS_I(inode);
> diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
> index 613b2fa7b1c1..e0a6cc23ace3 100644
> --- a/fs/f2fs/segment.h
> +++ b/fs/f2fs/segment.h
> @@ -497,19 +497,6 @@ static inline int reserved_sections(struct f2fs_sb_info *sbi)
> return GET_SEC_FROM_SEG(sbi, (unsigned int)reserved_segments(sbi));
> }
>
> -static inline bool need_SSR(struct f2fs_sb_info *sbi)
> -{
> - int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
> - int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
> - int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
> -
> - if (test_opt(sbi, LFS))
> - return false;
> -
> - return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
> - 2 * reserved_sections(sbi));
> -}
> -
> static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi,
> int freed, int needed)
> {
>

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