12:37 p.m.
Hi Magnus,
I love your patch! Perhaps something to improve:
[auto build test WARNING on bpf-next/master]
url:
https://github.com/0day-ci/linux/commits/Magnus-Karlsson/xsk-i40e-Tx-perf...
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: powerpc64-randconfig-r025-20201110 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project
4d81c8adb6ed9840257f6cb6b93f60856d422a15)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# install powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
#
https://github.com/0day-ci/linux/commit/b016bbeac6692a93e61b28efa430d6464...
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review
Magnus-Karlsson/xsk-i40e-Tx-performance-improvements/20201110-190310
git checkout b016bbeac6692a93e61b28efa430d64645032b5e
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
> drivers/net/ethernet/intel/i40e/i40e_xsk.c:417:13: warning:
unknown pragma ignored [-Wunknown-pragmas]
#pragma GCC unroll 4
^
1 warning generated.
vim +417 drivers/net/ethernet/intel/i40e/i40e_xsk.c
408
409 static void i40e_xmit_pkt_batch(struct i40e_ring *xdp_ring, struct xdp_desc *desc,
410 unsigned int *total_bytes)
411 {
412 u16 ntu = xdp_ring->next_to_use;
413 struct i40e_tx_desc *tx_desc;
414 dma_addr_t dma;
415 u32 i;
416
417 #pragma GCC unroll 4
418 for (i = 0; i <
PKTS_PER_BATCH; i++) {
419 dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc[i].addr);
420 xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma, desc[i].len);
421
422 tx_desc = I40E_TX_DESC(xdp_ring, ntu++);
423 tx_desc->buffer_addr = cpu_to_le64(dma);
424 tx_desc->cmd_type_offset_bsz = build_ctob(I40E_TX_DESC_CMD_ICRC |
425 I40E_TX_DESC_CMD_EOP,
426 0, desc[i].len, 0);
427
428 *total_bytes += desc[i].len;
429 }
430
431 xdp_ring->next_to_use = ntu;
432 }
433
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org