On Fri, Jun 7, 2024 at 10:23 AM Alice Ryhl <aliceryhl@xxxxxxxxxx> wrote: > > Make it possible to allocate memory that doesn't need to mapped into the > kernel's address space. This flag is useful together with > Page::alloc_page [1]. > > Rust Binder needs this for the memory that holds incoming transactions > for each process. Each process will have a few megabytes of memory > allocated with this flag, which is mapped into the process using > vm_insert_page. When the kernel copies data for an incoming transaction > into a process's memory region, it will use kmap_local_page to > temporarily map pages that are being modified. There is no need for them > to take up address space in the kernel when the kernel is not writing an > incoming transaction into the page. > > Link: https://lore.kernel.org/all/20240528-alice-mm-v7-4-78222c31b8f4@xxxxxxxxxx/ [1] > Signed-off-by: Alice Ryhl <aliceryhl@xxxxxxxxxx> Applied to `rust-next`, thanks! Cheers, Miguel
