Commit 04485987 authored by Hou Pengyang's avatar Hou Pengyang Committed by Jaegeuk Kim

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: default avatarHou Pengyang <houpengyang@huawei.com>
parent d84d1cbd
...@@ -1356,7 +1356,7 @@ int do_write_data_page(struct f2fs_io_info *fio) ...@@ -1356,7 +1356,7 @@ int do_write_data_page(struct f2fs_io_info *fio)
if (unlikely(fio->old_blkaddr != NEW_ADDR && if (unlikely(fio->old_blkaddr != NEW_ADDR &&
!is_cold_data(page) && !is_cold_data(page) &&
!IS_ATOMIC_WRITTEN_PAGE(page) && !IS_ATOMIC_WRITTEN_PAGE(page) &&
need_inplace_update(inode))) { need_inplace_update(inode, fio))) {
f2fs_unlock_op(F2FS_I_SB(inode)); f2fs_unlock_op(F2FS_I_SB(inode));
fio->cp_rwsem_locked = false; fio->cp_rwsem_locked = false;
err = rewrite_data_page(fio); err = rewrite_data_page(fio);
......
...@@ -1898,7 +1898,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi, ...@@ -1898,7 +1898,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
int err; int err;
/* if in-place-update policy is enabled, don't waste time here */ /* if in-place-update policy is enabled, don't waste time here */
if (need_inplace_update(inode)) if (need_inplace_update(inode, NULL))
return -EINVAL; return -EINVAL;
pg_start = range->start >> PAGE_SHIFT; pg_start = range->start >> PAGE_SHIFT;
......
...@@ -556,9 +556,11 @@ enum { ...@@ -556,9 +556,11 @@ enum {
F2FS_IPU_UTIL, F2FS_IPU_UTIL,
F2FS_IPU_SSR_UTIL, F2FS_IPU_SSR_UTIL,
F2FS_IPU_FSYNC, 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); struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
unsigned int policy = SM_I(sbi)->ipu_policy; unsigned int policy = SM_I(sbi)->ipu_policy;
...@@ -581,6 +583,14 @@ static inline bool need_inplace_update(struct inode *inode) ...@@ -581,6 +583,14 @@ static inline bool need_inplace_update(struct inode *inode)
utilization(sbi) > SM_I(sbi)->min_ipu_util) utilization(sbi) > SM_I(sbi)->min_ipu_util)
return true; 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 */ /* this is only set during fdatasync */
if (policy & (0x1 << F2FS_IPU_FSYNC) && if (policy & (0x1 << F2FS_IPU_FSYNC) &&
is_inode_flag_set(inode, FI_NEED_IPU)) is_inode_flag_set(inode, FI_NEED_IPU))
......
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