Btrfs: extent_write_locked_range() should attach inode->i_wb (dbb70bec) · Commits · 戴 / test

extent_write_locked_range() is used when we're falling back to buffered IO from inside of compression. It allocates its own wbc and should associate it with the inode's i_wb to make sure the IO goes down from the correct cgroup. Reviewed-by:

Josef Bacik <josef@toxicpanda.com> Signed-off-by:

Chris Mason <clm@fb.com> Signed-off-by:

David Sterba <dsterba@suse.com>

fs/btrfs/extent_io.c

+6 −4

Original line number	Diff line number	Diff line
		@@ -4255,6 +4255,7 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
		.no_cgroup_owner = 1,
		};

		wbc_attach_fdatawrite_inode(&wbc_writepages, inode);
		while (start <= end) {
		page = find_get_page(mapping, start >> PAGE_SHIFT);
		if (clear_page_dirty_for_io(page))
		@@ -4269,11 +4270,12 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
		}

		ASSERT(ret <= 0);
		if (ret < 0) {
		end_write_bio(&epd, ret);
		return ret;
		}
		if (ret == 0)
		ret = flush_write_bio(&epd);
		else
		end_write_bio(&epd, ret);

		wbc_detach_inode(&wbc_writepages);
		return ret;
		}

Admin message