Re: [GIT PULL] RTLA changes for v7.1

[Steven Rostedt]

On Fri, 27 Mar 2026 16:02:37 +0100
Tomas Glozar <tglozar@xxxxxxxxxx> wrote:

> Steven,
> 
> please pull the following changes for RTLA (more info in tag description).

I can pull this but I just noticed that starting with 7.0-rc1, it fails
to build without libbpf:

Auto-detecting system features:
...                           libtraceevent: [ on  ]
...                              libtracefs: [ on  ]
...                             libcpupower: [ OFF ]
...                                  libbpf: [ OFF ]
...                         clang-bpf-co-re: [ on  ]
...                       bpftool-skeletons: [ OFF ]

libcpupower is missing, building without --deepest-idle-state support.
Please install libcpupower-dev/kernel-tools-libs-devel
libbpf is missing, building without BPF skeleton support.
Please install libbpf-dev/libbpf-devel
bpftool is missing or not supporting skeletons, building without BPF skeleton support.
Please install bpftool
make -f /work/git/linux-trace.git/tools/build/Makefile.build dir=. obj=rtla
make[1]: Entering directory '/work/git/linux-trace.git/tools/tracing/rtla'
make[2]: Entering directory '/work/git/linux-trace.git/tools/tracing/rtla'
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/trace.o
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/utils.o
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/actions.o
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/common.o
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/osnoise.o
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/osnoise_top.o
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/osnoise_hist.o
  CC      /work/git/linux-trace.git/tools/tracing/rtla/src/timerlat.o
In file included from src/timerlat.c:18:
src/timerlat_bpf.h:15:10: fatal error: bpf/libbpf.h: No such file or directory
   15 | #include <bpf/libbpf.h>
      |          ^~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [/work/git/linux-trace.git/tools/build/Makefile.build:94: /work/git/linux-trace.git/tools/tracing/rtla/src/timerlat.o] Error 1
make[2]: Leaving directory '/work/git/linux-trace.git/tools/tracing/rtla'
make[1]: *** [/work/git/linux-trace.git/tools/build/Makefile.build:156: src] Error 2
make[1]: Leaving directory '/work/git/linux-trace.git/tools/tracing/rtla'
make: *** [Makefile:104: /work/git/linux-trace.git/tools/tracing/rtla/rtla-in.o] Error 2

That should probably be fixed on top of v7.0-rcX so that it is not
broken in 7.0.

-- Steve


> 
> Thanks,
> Tomas
> 
> The following changes since commit 11439c4635edd669ae435eec308f4ab8a0804808:
> 
>   Linux 7.0-rc2 (2026-03-01 15:39:31 -0800)
> 
> are available in the Git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/tglozar/linux.git tags/rtla-v7.1
> 
> for you to fetch changes up to 82374995b63d2de21414163828a32d52610dcaf2:
> 
>   Documentation/rtla: Document SIGINT behavior (2026-03-27 10:58:30 +0100)