Date
1 - 2 of 2
minutes: IO Visor TSC/Dev Meeting
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Brenden Blanco
Hi all,
Thanks for attending the call this week. My notes are included below. === Updates === DTrace GPLed in Dec 2017 - To help with Oracle Linux port - Should we take dtrace kernel code into linux? - opinion: probably not necessary now, more applicable 5 years ago - How about dtrace frontend? - may have more short term value - combine with bpftrace? - who would work on it? - userspace tools are now UPL - how does that work with apache2? - CTF - currently forking the format into BTF - exceed 32k types, other limitations - still, is the code useful to combine? bpfilter announcement - lots of lwn/reddit/hackernews comments Brenden: - Fixes for python3 string encoding - please test tools with python3 -W and submit PRs/issues - todo: push clang ir rewriter to github branch Yonghong: - Kernel related bugfixes - memory leak in shared lpm map Daniel: - bpfilter work - retpoline work in tail call code of x86 jit - also arm64 John: - some more sockmap changes - tx hooks - more testing, cleanup - optimizations in followup patches Joe: - Soliciting feedback for socket sharing patches - looking into storing data along with socket - scratch accessible from bpf program - How to protect scratch area? - new lock helper idea Sargun: - Asking for feedback on seccomp ebpf changes - desires access to read-only map for - use case for scratch buffer primitive as well Brendan: - New pcp-bcc-pmda plugin by redhat - tbd: integrate into vector Jesper: - XDP redirect work - bugfixes - page free and return API next - getting help from mellanox devs - XDP bulk xmit for rx === Attendees === Brenden Blanco Eduard Serra Alexei Starovoitov Joe String Jakub Kicinski Jiong Wang Mauricio Vasquez Quentin Monnet Saeed Sandipan Sargun Dhillon Brendan Gregg Yonghong Song Jesper Brouer Alexander Duyck Edwin Peer PJ Waskiewicz Daniel Borkmann Nic Viljoen John Fastabend Alexander Duyck |
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Brenden Blanco
On Wed, Feb 21, 2018 at 11:55 AM, Brenden Blanco <bblanco@...> wrote:
Hi all,As requested, I have pushed the WIP code to https://github.com/iovisor/bcc/tree/ir-probe-rewrite. Only one of the two test cases currently works. The basic idea is to use the pointer alias info to track which loads read from on-stack memory and maps, and treat the rest as unsafe reads and rewrite them into bpf_probe_read calls. Map data is not yet handled.
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