Messages in this thread |  | | Date | Mon, 1 Oct 2018 09:31:01 -0600 | From | Jason Gunthorpe <> | Subject | Re: [PATCH 0/4] get_user_pages*() and RDMA: first steps |
| |
On Mon, Oct 01, 2018 at 04:11:27PM +1000, Dave Chinner wrote:
> This reminds me so much of Linux mmap() in the mid-2000s - mmap() > worked for ext3 without being aware of page faults, so most mm/ > developers at the time were of the opinion that all the other > filesystems should work just fine without being aware of page > faults.
This is probably because RDMA was introduced around that time, before page_mkwrite was added.. It kind of sounds like page_mkwrite() broke all the writing get_user_pages users and it wasn't realized at the time.
BTW, we are hosting a session on this at Plumbers during the RDMA track, hope everyone interested will be able to attend.
Jason
|  |