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xeon08: Enable lttng lockdep tracepoints

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This commit is contained in:
Aleix Roca Nonell 2023-06-09 08:04:30 +02:00
parent a4c254fcd6
commit 8769f3d418
2 changed files with 16 additions and 5 deletions
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4
xeon08/configuration.nix
View File

@ -18,6 +18,10 @@
# disable automatic garbage collector
nix.gc.automatic = lib.mkForce false;
# members of the tracing group can use the lttng-provided kernel events
# without root permissions
users.groups.tracing.members = [ "arocanon" ];
# set up both ethernet and infiniband ips
networking = {
hostName = "xeon08";

17
xeon08/kernel/lttng.nix
View File

@ -2,12 +2,23 @@
let
# the lttng btrfs probe crashes at compile time because of an undefined
# The lttng btrfs probe crashes at compile time because of an undefined
# function. This disables the btrfs tracepoints to avoid the issue.
# Also enable lockdep tracepoints, this is disabled by default because it
# does not work well on architectures other than x86_64 (i think that arm) as
# I was told on the mailing list.
lttng-modules-fixed = config.boot.kernelPackages.lttng-modules.overrideAttrs (finalAttrs: previousAttrs: {
patchPhase = (lib.optionalString (previousAttrs ? patchPhase) previousAttrs.patchPhase) + ''
# disable btrfs
substituteInPlace src/probes/Kbuild \
--replace " obj-\$(CONFIG_LTTNG) += lttng-probe-btrfs.o" " #obj-\$(CONFIG_LTTNG) += lttng-probe-btrfs.o"
# enable lockdep tracepoints
substituteInPlace src/probes/Kbuild \
--replace "#ifneq (\$(CONFIG_LOCKDEP),)" "ifneq (\$(CONFIG_LOCKDEP),)" \
--replace "# obj-\$(CONFIG_LTTNG) += lttng-probe-lock.o" " obj-\$(CONFIG_LTTNG) += lttng-probe-lock.o" \
--replace "#endif # CONFIG_LOCKDEP" "endif # CONFIG_LOCKDEP"
'';
});
in {
@ -29,8 +40,4 @@ in {
'';
};
};
# members of the tracing group can use the lttng-provided kernel events
# without root permissions
users.groups.tracing.members = [ "arocanon" ];
}