diff options
| author | Hou Pengyang <houpengyang@huawei.com> | 2017-04-18 11:57:16 +0000 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-04-19 11:00:46 -0700 |
| commit | 04485987f05388ffec04cdab7808ba26db30c9b8 (patch) | |
| tree | c2303e587ea392ddbb4626c46e566b7eb661ecaf /fs/f2fs/segment.h | |
| parent | d84d1cbdec6b5d9ba391079a111572197db66d54 (diff) | |
f2fs: introduce async IPU policy
This patch introduces an ASYNC IPU policy.
Under senario of large # of async updating(e.g. log writing in Android),
disk would be seriously fragmented, and higher frequent gc would be triggered.
This patch uses IPU to rewrite the async update writting, since async is
NOT sensitive to io latency.
Signed-off-by: Hou Pengyang <houpengyang@huawei.com>
Diffstat (limited to 'fs/f2fs/segment.h')
| -rw-r--r-- | fs/f2fs/segment.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 5f6ef163aa8f..3cd780a42f51 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -556,9 +556,11 @@ enum { F2FS_IPU_UTIL, F2FS_IPU_SSR_UTIL, F2FS_IPU_FSYNC, + F2FS_IPU_ASYNC, }; -static inline bool need_inplace_update(struct inode *inode) +static inline bool need_inplace_update(struct inode *inode, + struct f2fs_io_info *fio) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); unsigned int policy = SM_I(sbi)->ipu_policy; @@ -581,6 +583,14 @@ static inline bool need_inplace_update(struct inode *inode) utilization(sbi) > SM_I(sbi)->min_ipu_util) return true; + /* + * IPU for rewrite async pages + */ + if (policy & (0x1 << F2FS_IPU_ASYNC) && + fio && fio->op == REQ_OP_WRITE && + !(fio->op_flags & REQ_SYNC)) + return true; + /* this is only set during fdatasync */ if (policy & (0x1 << F2FS_IPU_FSYNC) && is_inode_flag_set(inode, FI_NEED_IPU)) |