]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
net: fec: recycle pages for transmitted XDP frames
authorWei Fang <wei.fang@nxp.com>
Thu, 6 Jul 2023 08:10:10 +0000 (16:10 +0800)
committerPaolo Abeni <pabeni@redhat.com>
Tue, 11 Jul 2023 08:00:49 +0000 (10:00 +0200)
commit20f797399035a8052dbd7297fdbe094079a9482e
tree28fba76e56e4f457d49e507992f6f548af80de07
parentbe7ecbe7ec7df7320db4b810fef438bf67144011
net: fec: recycle pages for transmitted XDP frames

Once the XDP frames have been successfully transmitted through the
ndo_xdp_xmit() interface, it's the driver responsibility to free
the frames so that the page_pool can recycle the pages and reuse
them. However, this action is not implemented in the fec driver.
This leads to a user-visible problem that the console will print
the following warning log.

[  157.568851] page_pool_release_retry() stalled pool shutdown 1389 inflight 60 sec
[  217.983446] page_pool_release_retry() stalled pool shutdown 1389 inflight 120 sec
[  278.399006] page_pool_release_retry() stalled pool shutdown 1389 inflight 181 sec
[  338.812885] page_pool_release_retry() stalled pool shutdown 1389 inflight 241 sec
[  399.226946] page_pool_release_retry() stalled pool shutdown 1389 inflight 302 sec

Therefore, to solve this issue, we free XDP frames via xdp_return_frame()
while cleaning the tx BD ring.

Fixes: 6d6b39f180b8 ("net: fec: add initial XDP support")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
drivers/net/ethernet/freescale/fec.h
drivers/net/ethernet/freescale/fec_main.c