On Mon, 1 Apr 2019 14:17:56 -0700 Yongseok Koh <ys...@mellanox.com> wrote:
> +- ``mr_ext_memseg_en`` parameter [int] > + > + A nonzero value enables extending memseg when registering DMA memory. If > + enabled, the number of entries in MR (Memory Region) lookup table on > datapath > + is minimized and it benefits performance. On the other hand, it worsens > memory > + utilization because registered memory is pinned by kernel driver. Even if a > + page in the extended chunk is freed, that doesn't become reusable until the > + entire memory is freed. > + > + Enabled by default. > + This module parameter does not appear in the upstream Linux kernel drivers (even 5.2). What code are you referring to?
