[patch V2 00/20] bpf: Make BPF and PREEMPT_RT co-exist

From: Thomas Gleixner
Date: Thu Feb 20 2020 - 15:58:11 EST


Hi!

This is the second version of the BPF/RT patch set which makes both coexist
nicely. The long explanation can be found in the cover letter of the V1
submission:

https://lore.kernel.org/r/20200214133917.304937432@xxxxxxxxxxxxx

The following changes vs. V1 have been made:

- New patch to enforce preallocation for all instrumentation type
programs

- New patches which make the recursion protection safe against preemption
on RT (Mathieu)

- New patch which removes the unnecessary recursion protection around
the rcu_free() invocation

- Converted macro to inline (Mathieu)

- Added explanation about the seccomp loop to the changelog (Vinicius)

- Fixed the explicitely typos (Jakub)

- Dropped the migrate* stubs patches and merged them into the tip
tree. See below.

The series applies on top of:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-for-bpf-2020-02-20

This tag contains only the two migrate stub commits on top of 5.6-rc2 and
can be pulled into BPF. The commits are immutable and will be carried also
in tip so further changes in this area can be applied.

Thanks,

tglx

---
include/linux/bpf.h | 38 ++++++++-
include/linux/filter.h | 33 ++++++--
kernel/bpf/hashtab.c | 172 ++++++++++++++++++++++++++++++-------------
kernel/bpf/lpm_trie.c | 12 +--
kernel/bpf/percpu_freelist.c | 20 ++---
kernel/bpf/stackmap.c | 18 +++-
kernel/bpf/syscall.c | 27 ++----
kernel/bpf/trampoline.c | 9 +-
kernel/bpf/verifier.c | 18 ++--
kernel/events/core.c | 2
kernel/seccomp.c | 4 -
kernel/trace/bpf_trace.c | 6 -
lib/test_bpf.c | 4 -
net/bpf/test_run.c | 8 +-
net/core/flow_dissector.c | 4 -
net/core/skmsg.c | 8 --
net/kcm/kcmsock.c | 4 -
17 files changed, 252 insertions(+), 135 deletions(-)