Re: [dpdk-dev] Forcing inlining for igb_uio and kni

[Ilya Maximets <i.maximets@samsung.com>]

On 11.06.2019 11:45, David Marchand wrote:
> I noticed that OVS CI [1] patches the dpdk sources to force some inlining parameters and get kni and igb_uio to build fine.
> 
> Looking at it in dpdk, meson support dropped this.
> In the makefiles, I can't find a reason in the git history (we go back to 1.3.0rX version).
> 
> [dmarchan@dmarchan dpdk]$ git grep max-inline-insns-single
> kernel/linux/igb_uio/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=100
> kernel/linux/kni/Makefile:MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=50
> [dmarchan@dmarchan dpdk]$ git blame origin/master -- kernel/linux/igb_uio/Makefile |grep max-inline-insns-single
> 13dc56a6 lib/librte_eal/linuxapp/igb_uio/Makefile (Intel            2012-12-20 00:00:00 +0100 15) MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=100
> [dmarchan@dmarchan dpdk]$ git blame origin/master -- kernel/linux/kni/Makefile |grep max-inline-insns-single
> 3fc5ca2f lib/librte_eal/linuxapp/kni/Makefile (Intel            2012-12-20 00:00:00 +0100 14) MODULE_CFLAGS += -I$(SRCDIR) --param max-inline-insns-single=50
> 
> Is there a valid reason to keep this?
> 1: https://github.com/openvswitch/ovs/blob/master/.travis/linux-build.sh#L81 <https://protect2.fireeye.com/url?k=b7de159c45b1fa79.b7df9ed3-c4806461f28ecaf5&u=https://github.com/openvswitch/ovs/blob/master/.travis/linux-build.sh#L81>

Hi, David.
I don't know the reason for these in OVS travis config, But we don't
need to know them, actually. I have a patch to drop all the kernel
related stuff from the DPDK build in OVS Travis checks, just didn't
send it yet. Will send soon, probably.
If (or when) OVS Travis will migrate to meson, I'd suggest to just
use '-Denable_kmods=false'.

Best regards, Ilya Maximets.