; ker...@vger.kernel.org; linux-fsde...@vger.kernel.org; linux-
> m...@kvack.org; wangbintian(BintianWang) ;
> yipengxiang ; liulu 00013167
> ; hanfeng 00012985
> Subject: Re: [PATCH v3 1/4] fs: allow cross-FS copy_file_range for memory-
> backed files
>
> On Fri, May 30, 2025 at
On Fri, May 30, 2025 at 12:40 PM wangtao wrote:
>
> Memory-backed files can optimize copy performance via
> copy_file_range callbacks. Compared to mmap&read: reduces
> GUP (get_user_pages) overhead; vs sendfile/splice: eliminates
> one memory copy; supports dmabuf zero-copy implementation.
>
> Sig
Memory-backed files can optimize copy performance via
copy_file_range callbacks. Compared to mmap&read: reduces
GUP (get_user_pages) overhead; vs sendfile/splice: eliminates
one memory copy; supports dmabuf zero-copy implementation.
Signed-off-by: wangtao
---
fs/read_write.c| 71
