On Thu, Jul 12, 2018 at 11:12:45PM +0200, Daniel Borkmann wrote: > On 07/12/2018 11:02 PM, Russell King - ARM Linux wrote: > > On Thu, Jul 12, 2018 at 09:02:41PM +0200, Daniel Borkmann wrote: > >> Applied to bpf-next, thanks a lot Russell! > > > > Thanks, I've just sent four more patches, which is the sum total of > > what I'm intending to send for BPF improvements for the next merge > > window. > > Great, thanks a lot for the batch of improvements, Russell! > > Did you manage to get the BPF kselftest suite working on arm32 under > tools/testing/selftests/bpf/? In particular the test_verfier with > bpf_jit_enabled set to 1 and test_kmod.sh has a bigger number of > runtime tests that would stress it.
I have a big issue with almost all of the tools/ subdirectory, and that is that it isn't "portable". It seems that cross-build environments just weren't considered when the tools subdirectory was created - it appears to require the entire kernel tree and build tree to be accessible on the target in order to build almost everything there. (I also exclusively do split-object builds, I never do an in-source-tree build.) At least perf has the ability to ask Kbuild to package it up as a tar.* file. That can be easily transported to the target as a self-contained buildable tree, and then be able to built from that. My cross-build environment for the kernel is just for building kernels, it does not have the facilities to build for userspace - I have a wide range of userspaces across targets, with a multitude of different glibc versions, and even when they're compatible versions, they're built differently. As far as I can see, basically, most tools/ stuff requires too much effort to work around this to be of any use to me. Even if I did unpick it from the kernel source tree by hand, that would be wasted effort, because I'd need to repeat that same process whenever anything there gets updated. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 13.8Mbps down 630kbps up According to speedtest.net: 13Mbps down 490kbps up
