On Wed, 28 Feb 2024 at 15:40, Hou Tao <houtao@xxxxxxxxxxxxxxx> wrote: > So instead of limiting both the values of max_read and max_write in > kernel, capping the maximal length of kvec iter IO by using max_pages in > fuse_direct_io() just like it does for ubuf/iovec iter IO. Now the max > value for max_pages is 256, so on host with 4KB page size, the maximal > size passed to kmalloc() in copy_args_to_argbuf() is about 1MB+40B. The > allocation of 2MB of physically contiguous memory will still incur > significant stress on the memory subsystem, but the warning is fixed. > Additionally, the requirement for huge physically contiguous memory will > be removed in the following patch. So the issue will be fixed properly by following patches? In that case this patch could be omitted, right? Thanks, Miklos
