On 6/29/2018 1:17 PM, Rafal Kozik wrote: > From: Kozik <r...@semihalf.com> > > Write combining (WC) increases NIC performance by making better > utilization of PCI bus, but cannot be use by all PMD. > > To get internal_addr memory need to be mapped. But as memory could not be > mapped twice: with and without WC it should be skipped for WC. [1] > > To do not spoil other drivers that potentially could use internal_addr, > parameter wc_activate adds possibility to skip it for those PMDs, > that do not use it. > > [1] https://www.kernel.org/doc/ols/2008/ols2008v2-pages-135-144.pdf > section 5.3 and 5.4 > > Signed-off-by: Rafal Kozik <r...@semihalf.com> > Acked-by: Bruce Richardson <bruce.richard...@intel.com>
Acked-by: Ferruh Yigit <ferruh.yi...@intel.com> (I am still not able to confirm this is needed, but since the behavior change is controlled by module param and internal_addr is not used at all, no need to block the patch)
