fs: add support for buffered writeback to pass down write hints (8e8f9298) · Commits · 戴 / test

fs/buffer.c

+8 −5

Original line number	Diff line number	Diff line
		@@ -49,7 +49,7 @@

		static int fsync_buffers_list(spinlock_t lock, struct list_head list);
		static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
		struct writeback_control *wbc);
		enum rw_hint hint, struct writeback_control *wbc);

		#define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)

		@@ -1829,7 +1829,8 @@ int __block_write_full_page(struct inode inode, struct page page,
		do {
		struct buffer_head *next = bh->b_this_page;
		if (buffer_async_write(bh)) {
		submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
		submit_bh_wbc(REQ_OP_WRITE, write_flags, bh,
		inode->i_write_hint, wbc);
		nr_underway++;
		}
		bh = next;
		@@ -1883,7 +1884,8 @@ recover:
		struct buffer_head *next = bh->b_this_page;
		if (buffer_async_write(bh)) {
		clear_buffer_dirty(bh);
		submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
		submit_bh_wbc(REQ_OP_WRITE, write_flags, bh,
		inode->i_write_hint, wbc);
		nr_underway++;
		}
		bh = next;
		@@ -3091,7 +3093,7 @@ void guard_bio_eod(int op, struct bio *bio)
		}

		static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
		struct writeback_control *wbc)
		enum rw_hint write_hint, struct writeback_control *wbc)
		{
		struct bio *bio;

		@@ -3120,6 +3122,7 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,

		bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
		bio->bi_bdev = bh->b_bdev;
		bio->bi_write_hint = write_hint;

		bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh));
		BUG_ON(bio->bi_iter.bi_size != bh->b_size);
		@@ -3142,7 +3145,7 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,

		int submit_bh(int op, int op_flags, struct buffer_head *bh)
		{
		return submit_bh_wbc(op, op_flags, bh, NULL);
		return submit_bh_wbc(op, op_flags, bh, 0, NULL);
		}
		EXPORT_SYMBOL(submit_bh);

fs/mpage.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -615,6 +615,7 @@ alloc_new:
		goto confused;

		wbc_init_bio(wbc, bio);
		bio->bi_write_hint = inode->i_write_hint;
		}

		/*

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