On 5/5/26 16:29, Alexander Lobakin wrote:
libeth uses netmems for quite some time already, so in order to support unreadable frags / memory providers, it only needs to set PP_FLAG_ALLOW_UNREADABLE_NETMEM when needed. Also add a couple sanity checks to make sure the driver didn't mess up the configuration options and, in case when an MP is installed, return the truesize always equal to PAGE_SIZE, so that libeth_rx_alloc() will never try to allocate frags. Memory providers manage buffers on their own and expect 1:1 buffer / HW Rx descriptor association.
Maybe I'm misreading it, but providers don't expect that. It's fine to use page_pool_alloc_frag_netmem() and friends, just like bnxt and other drivers do. net_iovs are refcounted in the same way as normal pages. Hope it helps. -- Pavel Begunkov
