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Diffstat (limited to 'fs/f2fs/gc.c')
-rw-r--r--fs/f2fs/gc.c115
1 files changed, 78 insertions, 37 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index fa3d2e2df8e7..bfe6a8ccc3a0 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -28,16 +28,21 @@ static int gc_thread_func(void *data)
struct f2fs_sb_info *sbi = data;
struct f2fs_gc_kthread *gc_th = sbi->gc_thread;
wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head;
- long wait_ms;
+ unsigned int wait_ms;
wait_ms = gc_th->min_sleep_time;
set_freezable();
do {
wait_event_interruptible_timeout(*wq,
- kthread_should_stop() || freezing(current),
+ kthread_should_stop() || freezing(current) ||
+ gc_th->gc_wake,
msecs_to_jiffies(wait_ms));
+ /* give it a try one time */
+ if (gc_th->gc_wake)
+ gc_th->gc_wake = 0;
+
if (try_to_freeze())
continue;
if (kthread_should_stop())
@@ -55,6 +60,9 @@ static int gc_thread_func(void *data)
}
#endif
+ if (!sb_start_write_trylock(sbi->sb))
+ continue;
+
/*
* [GC triggering condition]
* 0. GC is not conducted currently.
@@ -69,19 +77,24 @@ static int gc_thread_func(void *data)
* So, I'd like to wait some time to collect dirty segments.
*/
if (!mutex_trylock(&sbi->gc_mutex))
- continue;
+ goto next;
+
+ if (gc_th->gc_urgent) {
+ wait_ms = gc_th->urgent_sleep_time;
+ goto do_gc;
+ }
if (!is_idle(sbi)) {
increase_sleep_time(gc_th, &wait_ms);
mutex_unlock(&sbi->gc_mutex);
- continue;
+ goto next;
}
if (has_enough_invalid_blocks(sbi))
decrease_sleep_time(gc_th, &wait_ms);
else
increase_sleep_time(gc_th, &wait_ms);
-
+do_gc:
stat_inc_bggc_count(sbi);
/* if return value is not zero, no victim was selected */
@@ -93,6 +106,8 @@ static int gc_thread_func(void *data)
/* balancing f2fs's metadata periodically */
f2fs_balance_fs_bg(sbi);
+next:
+ sb_end_write(sbi->sb);
} while (!kthread_should_stop());
return 0;
@@ -110,11 +125,14 @@ int start_gc_thread(struct f2fs_sb_info *sbi)
goto out;
}
+ gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME;
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME;
gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME;
gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME;
gc_th->gc_idle = 0;
+ gc_th->gc_urgent = 0;
+ gc_th->gc_wake= 0;
sbi->gc_thread = gc_th;
init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head);
@@ -259,20 +277,11 @@ static unsigned int get_greedy_cost(struct f2fs_sb_info *sbi,
valid_blocks * 2 : valid_blocks;
}
-static unsigned int get_ssr_cost(struct f2fs_sb_info *sbi,
- unsigned int segno)
-{
- struct seg_entry *se = get_seg_entry(sbi, segno);
-
- return se->ckpt_valid_blocks > se->valid_blocks ?
- se->ckpt_valid_blocks : se->valid_blocks;
-}
-
static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi,
unsigned int segno, struct victim_sel_policy *p)
{
if (p->alloc_mode == SSR)
- return get_ssr_cost(sbi, segno);
+ return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
/* alloc_mode == LFS */
if (p->gc_mode == GC_GREEDY)
@@ -582,7 +591,7 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
}
*nofs = ofs_of_node(node_page);
- source_blkaddr = datablock_addr(node_page, ofs_in_node);
+ source_blkaddr = datablock_addr(NULL, node_page, ofs_in_node);
f2fs_put_page(node_page, 1);
if (source_blkaddr != blkaddr)
@@ -590,8 +599,12 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
return true;
}
-static void move_encrypted_block(struct inode *inode, block_t bidx,
- unsigned int segno, int off)
+/*
+ * Move data block via META_MAPPING while keeping locked data page.
+ * This can be used to move blocks, aka LBAs, directly on disk.
+ */
+static void move_data_block(struct inode *inode, block_t bidx,
+ unsigned int segno, int off)
{
struct f2fs_io_info fio = {
.sbi = F2FS_I_SB(inode),
@@ -684,6 +697,8 @@ static void move_encrypted_block(struct inode *inode, block_t bidx,
fio.new_blkaddr = newaddr;
f2fs_submit_page_write(&fio);
+ f2fs_update_iostat(fio.sbi, FS_GC_DATA_IO, F2FS_BLKSIZE);
+
f2fs_update_data_blkaddr(&dn, newaddr);
set_inode_flag(inode, FI_APPEND_WRITE);
if (page->index == 0)
@@ -731,6 +746,7 @@ static void move_data_page(struct inode *inode, block_t bidx, int gc_type,
.page = page,
.encrypted_page = NULL,
.need_lock = LOCK_REQ,
+ .io_type = FS_GC_DATA_IO,
};
bool is_dirty = PageDirty(page);
int err;
@@ -819,8 +835,7 @@ next_step:
continue;
/* if encrypted inode, let's go phase 3 */
- if (f2fs_encrypted_inode(inode) &&
- S_ISREG(inode->i_mode)) {
+ if (f2fs_encrypted_file(inode)) {
add_gc_inode(gc_list, inode);
continue;
}
@@ -854,14 +869,18 @@ next_step:
continue;
}
locked = true;
+
+ /* wait for all inflight aio data */
+ inode_dio_wait(inode);
}
start_bidx = start_bidx_of_node(nofs, inode)
+ ofs_in_node;
- if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
- move_encrypted_block(inode, start_bidx, segno, off);
+ if (f2fs_encrypted_file(inode))
+ move_data_block(inode, start_bidx, segno, off);
else
- move_data_page(inode, start_bidx, gc_type, segno, off);
+ move_data_page(inode, start_bidx, gc_type,
+ segno, off);
if (locked) {
up_write(&fi->dio_rwsem[WRITE]);
@@ -898,7 +917,7 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
struct blk_plug plug;
unsigned int segno = start_segno;
unsigned int end_segno = start_segno + sbi->segs_per_sec;
- int sec_freed = 0;
+ int seg_freed = 0;
unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ?
SUM_TYPE_DATA : SUM_TYPE_NODE;
@@ -944,6 +963,10 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
gc_type);
stat_inc_seg_count(sbi, type, gc_type);
+
+ if (gc_type == FG_GC &&
+ get_valid_blocks(sbi, segno, false) == 0)
+ seg_freed++;
next:
f2fs_put_page(sum_page, 0);
}
@@ -954,21 +977,17 @@ next:
blk_finish_plug(&plug);
- if (gc_type == FG_GC &&
- get_valid_blocks(sbi, start_segno, true) == 0)
- sec_freed = 1;
-
stat_inc_call_count(sbi->stat_info);
- return sec_freed;
+ return seg_freed;
}
int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
bool background, unsigned int segno)
{
int gc_type = sync ? FG_GC : BG_GC;
- int sec_freed = 0;
- int ret;
+ int sec_freed = 0, seg_freed = 0, total_freed = 0;
+ int ret = 0;
struct cp_control cpc;
unsigned int init_segno = segno;
struct gc_inode_list gc_list = {
@@ -976,6 +995,15 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
.iroot = RADIX_TREE_INIT(GFP_NOFS),
};
+ trace_f2fs_gc_begin(sbi->sb, sync, background,
+ get_pages(sbi, F2FS_DIRTY_NODES),
+ get_pages(sbi, F2FS_DIRTY_DENTS),
+ get_pages(sbi, F2FS_DIRTY_IMETA),
+ free_sections(sbi),
+ free_segments(sbi),
+ reserved_segments(sbi),
+ prefree_segments(sbi));
+
cpc.reason = __get_cp_reason(sbi);
gc_more:
if (unlikely(!(sbi->sb->s_flags & MS_ACTIVE))) {
@@ -1002,17 +1030,20 @@ gc_more:
gc_type = FG_GC;
}
- ret = -EINVAL;
/* f2fs_balance_fs doesn't need to do BG_GC in critical path. */
- if (gc_type == BG_GC && !background)
+ if (gc_type == BG_GC && !background) {
+ ret = -EINVAL;
goto stop;
- if (!__get_victim(sbi, &segno, gc_type))
+ }
+ if (!__get_victim(sbi, &segno, gc_type)) {
+ ret = -ENODATA;
goto stop;
- ret = 0;
+ }
- if (do_garbage_collect(sbi, segno, &gc_list, gc_type) &&
- gc_type == FG_GC)
+ seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type);
+ if (gc_type == FG_GC && seg_freed == sbi->segs_per_sec)
sec_freed++;
+ total_freed += seg_freed;
if (gc_type == FG_GC)
sbi->cur_victim_sec = NULL_SEGNO;
@@ -1029,6 +1060,16 @@ gc_more:
stop:
SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0;
SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno;
+
+ trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed,
+ get_pages(sbi, F2FS_DIRTY_NODES),
+ get_pages(sbi, F2FS_DIRTY_DENTS),
+ get_pages(sbi, F2FS_DIRTY_IMETA),
+ free_sections(sbi),
+ free_segments(sbi),
+ reserved_segments(sbi),
+ prefree_segments(sbi));
+
mutex_unlock(&sbi->gc_mutex);
put_gc_inode(&gc_list);
generated by cgit (git 2.34.1) at 2024-05-12 04:40:09 +0000