On Wed, Jul 3, 2024 at 8:53 AM Sadineni, Harish via
lists.openembedded.org
<[email protected]> wrote:
>
> From: Harish Sadineni <[email protected]>
>
> Running /usr/share/bcc/tools/runqlat 1 5 gives following error:-
>
> libbpf: failed to find valid kernel BTF
> /virtual/main.c:92:15: error: no member named 'state' in 'struct task_struct'
> if (prev->state == TASK_RUNNING) {
> ~~~~ ^
> 1 error generated.
>
> It is due to the modification of state to __state in latest kernels.
>
> The following commit addressed the issue which checks whether the struct
> "task_struct" has __state or state
> https://github.com/chenhengqi/bcc/commit/d3cf5dcecfaeb6d8d346e2228626a7dbe506ad38
> The above patch requires enabling CONFIG_DEBUG_INFO_BTF in the kernel
> and requires pahole.
>
> Signed-off-by: Harish Sadineni <[email protected]>
> ---
> meta/recipes-kernel/linux/linux-yocto.inc | 3 ++-
> meta/recipes-kernel/linux/linux-yocto/cg2.cfg | 2 ++
> meta/recipes-kernel/linux/linux-yocto/cg2.scc | 1 +
> meta/recipes-kernel/linux/linux-yocto_6.6.bb | 2 ++
> 4 files changed, 7 insertions(+), 1 deletion(-)
> create mode 100644 meta/recipes-kernel/linux/linux-yocto/cg2.cfg
> create mode 100644 meta/recipes-kernel/linux/linux-yocto/cg2.scc
>
> diff --git a/meta/recipes-kernel/linux/linux-yocto.inc
> b/meta/recipes-kernel/linux/linux-yocto.inc
> index 0132fcffb3..d6b4794d32 100644
> --- a/meta/recipes-kernel/linux/linux-yocto.inc
> +++ b/meta/recipes-kernel/linux/linux-yocto.inc
> @@ -65,11 +65,12 @@ KERNEL_DEBUG ?= ""
> DEPENDS += '${@bb.utils.contains_any("ARCH", [ "x86", "arm64", "powerpc" ],
> "elfutils-native", "", d)}'
> DEPENDS += "openssl-native util-linux-native"
> DEPENDS += "gmp-native libmpc-native"
> +DEPENDS += "pahole-native"
This has to be conditional, it is only required in certain
configurations. You may need
another image or distro configuration option to control the
conditional depends, just
like we did with KERNEL_DEBUG (and see my comment below, I think we
still should).
>
> # Some options depend on CONFIG_PAHOLE_VERSION, so need to make
> pahole-native available before do_kernel_configme
> do_kernel_configme[depends] += '${@bb.utils.contains("KERNEL_DEBUG", "True",
> "pahole-native:do_populate_sysroot", "", d)}'
>
> -EXTRA_OEMAKE += '${@bb.utils.contains("KERNEL_DEBUG", "True", "",
> "PAHOLE=false", d)}'
You need to justify this change. It wasn't a mistake that we wanted to
force phole off
when debug wasn't enabled.
> +EXTRA_OEMAKE += '${@bb.utils.contains("KERNEL_DEBUG", "True", "", "", d)}'
>
> do_devshell:prepend() {
> # setup native pkg-config variables (kconfig scripts call pkg-config
> directly, cannot generically be overriden to pkg-config-native)
> diff --git a/meta/recipes-kernel/linux/linux-yocto/cg2.cfg
> b/meta/recipes-kernel/linux/linux-yocto/cg2.cfg
> new file mode 100644
> index 0000000000..7c60e87a1a
> --- /dev/null
> +++ b/meta/recipes-kernel/linux/linux-yocto/cg2.cfg
> @@ -0,0 +1,2 @@
> +CONFIG_IKHEADERS=y
> +CONFIG_DEBUG_INFO_BTF=y
> diff --git a/meta/recipes-kernel/linux/linux-yocto/cg2.scc
> b/meta/recipes-kernel/linux/linux-yocto/cg2.scc
> new file mode 100644
> index 0000000000..7047be85f7
> --- /dev/null
> +++ b/meta/recipes-kernel/linux/linux-yocto/cg2.scc
> @@ -0,0 +1 @@
> +kconf non-hardware cg2.cfg
> diff --git a/meta/recipes-kernel/linux/linux-yocto_6.6.bb
> b/meta/recipes-kernel/linux/linux-yocto_6.6.bb
> index 62c0f0ab36..cba61aa2d7 100644
> --- a/meta/recipes-kernel/linux/linux-yocto_6.6.bb
> +++ b/meta/recipes-kernel/linux/linux-yocto_6.6.bb
> @@ -72,3 +72,5 @@ KERNEL_FEATURES:append:powerpc64le ="
> arch/powerpc/powerpc-debug.scc"
>
> INSANE_SKIP:kernel-vmlinux:qemuppc64 = "textrel"
>
> +SRC_URI += "file://cg2.scc"
> +KERNEL_FEATURES += "cg2.scc"
Fragments don't go in the meta data layers, this needs to be submitted
to the kernel-cache and enabled with a KERNEL_FEATURE.
Cheers,
Bruce
> --
> 2.43.0
>
>
>
>
--
- Thou shalt not follow the NULL pointer, for chaos and madness await
thee at its end
- "Use the force Harry" - Gandalf, Star Trek II
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