1 files changed, 12 insertions, 5 deletions

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index daee4ab913da..f939660941bb 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -205,6 +205,8 @@ retry:
         list_add_tail(&new->list, &fi->inmem_pages);
         inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
         mutex_unlock(&fi->inmem_lock);
+
+        trace_f2fs_register_inmem_page(page, INMEM);
 }
 
 void commit_inmem_pages(struct inode *inode, bool abort)
@@ -238,11 +240,13 @@ void commit_inmem_pages(struct inode *inode, bool abort)
                                 f2fs_wait_on_page_writeback(cur->page, DATA);
                                 if (clear_page_dirty_for_io(cur->page))
                                         inode_dec_dirty_pages(inode);
+                                trace_f2fs_commit_inmem_page(cur->page, INMEM);
                                 do_write_data_page(cur->page, &fio);
                                 submit_bio = true;
                         }
                         f2fs_put_page(cur->page, 1);
                 } else {
+                        trace_f2fs_commit_inmem_page(cur->page, INMEM_DROP);
                         put_page(cur->page);
                 }
                 radix_tree_delete(&fi->inmem_root, cur->page->index);
@@ -277,6 +281,9 @@ void f2fs_balance_fs(struct f2fs_sb_info *sbi)
 
 void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
 {
+        /* try to shrink extent cache when there is no enough memory */
+        f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
+
         /* check the # of cached NAT entries and prefree segments */
         if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK) ||
                         excess_prefree_segs(sbi) ||
@@ -549,7 +556,7 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 
                 end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1);
 
-                if (end - start < cpc->trim_minlen)
+                if (force && end - start < cpc->trim_minlen)
                         continue;
 
                 __add_discard_entry(sbi, cpc, start, end);
@@ -1164,6 +1171,7 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
         curseg = CURSEG_I(sbi, type);
 
         mutex_lock(&curseg->curseg_mutex);
+        mutex_lock(&sit_i->sentry_lock);
 
         /* direct_io'ed data is aligned to the segment for better performance */
         if (direct_io && curseg->next_blkoff)
@@ -1178,7 +1186,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
          */
         __add_sum_entry(sbi, type, sum);
 
-        mutex_lock(&sit_i->sentry_lock);
         __refresh_next_blkoff(sbi, curseg);
 
         stat_inc_block_count(sbi, curseg);
@@ -1730,6 +1737,9 @@ void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
         mutex_lock(&curseg->curseg_mutex);
         mutex_lock(&sit_i->sentry_lock);
 
+        if (!sit_i->dirty_sentries)
+                goto out;
+
         /*
          * add and account sit entries of dirty bitmap in sit entry
          * set temporarily
@@ -1744,9 +1754,6 @@ void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
         if (!__has_cursum_space(sum, sit_i->dirty_sentries, SIT_JOURNAL))
                 remove_sits_in_journal(sbi);
 
-        if (!sit_i->dirty_sentries)
-                goto out;
-
         /*
          * there are two steps to flush sit entries:
          * #1, flush sit entries to journal in current cold data summary block.