On Tue, Apr 11, 2023 at 10:26 PM Jason Gunthorpe <jgg@xxxxxxxx> wrote: > > On Mon, Apr 10, 2023 at 04:11:55AM -0700, Selvin Xavier wrote: > > Enabling the low latency push in Gen P5 adapters for small > > packets. This is supported only for the user space QPs. > > Introduce new mmap flag for write combine buffers. > > Allocate separate Write Combine pages from BAR when Low > > latency push mode is enabled in HW. > > No new mmap flags. > > This looks like it is basically the same as mlx5, I expect you'll run > into all the same issues and needs as mlx5 did. > > Follow the modern mlx5 design, add a new API to allocate one of these > pages and have it return back the mmap cookie to use. Let userspace > allocate as many as it needs. Thanks Jason for the pointers. Will review this and rework on the patch > > Jason
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