| Message ID | 1593671885-30822-1-git-send-email-lirongqing@baidu.com |
|---|---|
| State | Awaiting Upstream |
| Delegated to: | David Miller |
| Headers | show |
| Series | [net-next] i40e: prefetch struct page of rx buffer conditionally | expand |
> -----Original Message----- > From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of Li > RongQing > Sent: Wednesday, July 1, 2020 11:38 PM > To: intel-wired-lan@lists.osuosl.org; netdev@vger.kernel.org > Subject: [Intel-wired-lan] [PATCH][net-next] i40e: prefetch struct page of rx > buffer conditionally > > page_address() accesses struct page only when WANT_PAGE_VIRTUAL or > HASHED_PAGE_VIRTUAL is defined, otherwise it returns address based on > offset, so we prefetch it conditionally > > Signed-off-by: Li RongQing <lirongqing@baidu.com> > --- > drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 ++ > 1 file changed, 2 insertions(+) Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index f9555c847f73..b3836092c327 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -1953,7 +1953,9 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct i40e_ring *rx_ring, struct i40e_rx_buffer *rx_buffer; rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_clean); +#if defined(WANT_PAGE_VIRTUAL) || defined(HASHED_PAGE_VIRTUAL) prefetchw(rx_buffer->page); +#endif /* we are reusing so sync this buffer for CPU use */ dma_sync_single_range_for_cpu(rx_ring->dev,
page_address() accesses struct page only when WANT_PAGE_VIRTUAL or HASHED_PAGE_VIRTUAL is defined, otherwise it returns address based on offset, so we prefetch it conditionally Signed-off-by: Li RongQing <lirongqing@baidu.com> --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 ++ 1 file changed, 2 insertions(+)