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Commit c8330bdc authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
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f2fs: drop page cache after fs shutdown 



Don't remain dirtied page cache in f2fs after shutdown, it can mitigate
memory pressure of whole system, in order to keep other modules working
properly.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent ef83735b

fs/f2fs/checkpoint.c

+5 −2
Original line number Diff line number Diff line
@@ -238,12 +238,15 @@ static int __f2fs_write_meta_page(struct page *page, 


	trace_f2fs_writepage(page, META);



	if (unlikely(f2fs_cp_error(sbi))) {

		dec_page_count(sbi, F2FS_DIRTY_META);

		unlock_page(page);

		return 0;

	}

	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))

		goto redirty_out;

	if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))

		goto redirty_out;

	if (unlikely(f2fs_cp_error(sbi)))

		goto redirty_out;



	write_meta_page(sbi, page, io_type);

	dec_page_count(sbi, F2FS_DIRTY_META);

fs/f2fs/data.c

+6 −6
Original line number Diff line number Diff line
@@ -1715,6 +1715,12 @@ static int __write_data_page(struct page *page, bool *submitted, 


	trace_f2fs_writepage(page, DATA);



	/* we should bypass data pages to proceed the kworkder jobs */

	if (unlikely(f2fs_cp_error(sbi))) {

		mapping_set_error(page->mapping, -EIO);

		goto out;

	}



	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))

		goto redirty_out;
@@ -1739,12 +1745,6 @@ write: 
			available_free_memory(sbi, BASE_CHECK))))

		goto redirty_out;



	/* we should bypass data pages to proceed the kworkder jobs */

	if (unlikely(f2fs_cp_error(sbi))) {

		mapping_set_error(page->mapping, -EIO);

		goto out;

	}



	/* Dentry blocks are controlled by checkpoint */

	if (S_ISDIR(inode->i_mode)) {

		fio.need_lock = LOCK_DONE;

fs/f2fs/node.c

+10 −9
Original line number Diff line number Diff line
@@ -1345,10 +1345,14 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted, 


	trace_f2fs_writepage(page, NODE);



	if (unlikely(f2fs_cp_error(sbi))) {

		dec_page_count(sbi, F2FS_DIRTY_NODES);

		unlock_page(page);

		return 0;

	}



	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))

		goto redirty_out;

	if (unlikely(f2fs_cp_error(sbi)))

		goto redirty_out;



	/* get old block addr of this node page */

	nid = nid_of_node(page);
@@ -1593,12 +1597,6 @@ next_step: 
			struct page *page = pvec.pages[i];

			bool submitted = false;



			if (unlikely(f2fs_cp_error(sbi))) {

				pagevec_release(&pvec);

				ret = -EIO;

				goto out;

			}



			/*

			 * flushing sequence with step:

			 * 0. indirect nodes
@@ -1668,9 +1666,12 @@ continue_unlock: 
		step++;

		goto next_step;

	}

out:



	if (nwritten)

		f2fs_submit_merged_write(sbi, NODE);



	if (unlikely(f2fs_cp_error(sbi)))

		return -EIO;

	return ret;

}