在 2023/7/30 19:18, Matthew Wilcox 写道:

On Sun, Jul 30, 2023 at 07:01:26PM +0800, Zhu Yanjun wrote:

quoted

Does the following function have folio version?

"
int sg_alloc_append_table_from_pages(struct sg_append_table *sgt_append,
		struct page **pages, unsigned int n_pages, unsigned int offset,
		unsigned long size, unsigned int max_segment,
		unsigned int left_pages, gfp_t gfp_mask)
"

No -- I haven't needed to convert anything that uses
sg_alloc_append_table_from_pages() yet.  It doesn't look like it should
be _too_ hard to add a folio version.

In many places, this function is used. So this function needs the folio 
version.

Another problem, after folio is used, I want to know the performance 
after folio is implemented.

How to make tests to get the performance?

Thanks a lot.

Zhu Yanjun