diff options
Diffstat (limited to 'fs/f2fs/segment.h')
| -rw-r--r-- | fs/f2fs/segment.h | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index ea563760f4b7..e9a10bdd7fed 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -476,19 +476,51 @@ static inline int utilization(struct f2fs_sb_info *sbi) /* * Sometimes f2fs may be better to drop out-of-place update policy. - * So, if fs utilization is over MIN_IPU_UTIL, then f2fs tries to write - * data in the original place likewise other traditional file systems. - * But, currently set 100 in percentage, which means it is disabled. - * See below need_inplace_update(). + * And, users can control the policy through sysfs entries. + * There are five policies with triggering conditions as follows. + * F2FS_IPU_FORCE - all the time, + * F2FS_IPU_SSR - if SSR mode is activated, + * F2FS_IPU_UTIL - if FS utilization is over threashold, + * F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over + * threashold, + * F2FS_IPUT_DISABLE - disable IPU. (=default option) */ -#define MIN_IPU_UTIL 100 +#define DEF_MIN_IPU_UTIL 70 + +enum { + F2FS_IPU_FORCE, + F2FS_IPU_SSR, + F2FS_IPU_UTIL, + F2FS_IPU_SSR_UTIL, + F2FS_IPU_DISABLE, +}; + static inline bool need_inplace_update(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + + /* IPU can be done only for the user data */ if (S_ISDIR(inode->i_mode)) return false; - if (need_SSR(sbi) && utilization(sbi) > MIN_IPU_UTIL) + + switch (SM_I(sbi)->ipu_policy) { + case F2FS_IPU_FORCE: return true; + case F2FS_IPU_SSR: + if (need_SSR(sbi)) + return true; + break; + case F2FS_IPU_UTIL: + if (utilization(sbi) > SM_I(sbi)->min_ipu_util) + return true; + break; + case F2FS_IPU_SSR_UTIL: + if (need_SSR(sbi) && utilization(sbi) > SM_I(sbi)->min_ipu_util) + return true; + break; + case F2FS_IPU_DISABLE: + break; + } return false; } |