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f2fs: change the ipu_policy option to enable combinations 

This patch changes the ipu_policy setting to use any combination of orthogonal policies.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2014-09-16 18:30:54 -07:00
parent 210f41bc04
commit 9b5f136fd4
3 changed files with 20 additions and 27 deletions
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6
Documentation/filesystems/f2fs.txt
View File

@ -192,9 +192,9 @@ Files in /sys/fs/f2fs/<devname>
ipu_policy This parameter controls the policy of in-place
updates in f2fs. There are five policies:
0: F2FS_IPU_FORCE, 1: F2FS_IPU_SSR,
2: F2FS_IPU_UTIL, 3: F2FS_IPU_SSR_UTIL,
4: F2FS_IPU_FSYNC, 5: F2FS_IPU_DISABLE.
0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR,
0x04: F2FS_IPU_UTIL, 0x08: F2FS_IPU_SSR_UTIL,
0x10: F2FS_IPU_FSYNC.
min_ipu_util This parameter controls the threshold to trigger
in-place-updates. The number indicates percentage

2
fs/f2fs/segment.c
View File

@ -1928,7 +1928,7 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
sm_info->rec_prefree_segments = sm_info->main_segments *
DEF_RECLAIM_PREFREE_SEGMENTS / 100;
sm_info->ipu_policy = F2FS_IPU_FSYNC;
sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;

39
fs/f2fs/segment.h
View File

@ -487,40 +487,33 @@ enum {
F2FS_IPU_UTIL,
F2FS_IPU_SSR_UTIL,
F2FS_IPU_FSYNC,
F2FS_IPU_DISABLE,
};
static inline bool need_inplace_update(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
unsigned int policy = SM_I(sbi)->ipu_policy;
/* IPU can be done only for the user data */
if (S_ISDIR(inode->i_mode))
return false;
switch (SM_I(sbi)->ipu_policy) {
case F2FS_IPU_FORCE:
if (policy & (0x1 << 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_FSYNC:
/* this is only set during fdatasync */
if (is_inode_flag_set(F2FS_I(inode), FI_NEED_IPU))
return true;
break;
case F2FS_IPU_DISABLE:
break;
}
if (policy & (0x1 << F2FS_IPU_SSR) && need_SSR(sbi))
return true;
if (policy & (0x1 << F2FS_IPU_UTIL) &&
utilization(sbi) > SM_I(sbi)->min_ipu_util)
return true;
if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && need_SSR(sbi) &&
utilization(sbi) > SM_I(sbi)->min_ipu_util)
return true;
/* this is only set during fdatasync */
if (policy & (0x1 << F2FS_IPU_FSYNC) &&
is_inode_flag_set(F2FS_I(inode), FI_NEED_IPU))
return true;
return false;
}