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f19c961b4e
With the default kernel and thus with the build I have tested in
74ec94bfa2, we get an error during
modules_install:
make[2]: execvp: /nix/store/.../bin/bash: Argument list too long
I haven't noticed this build until I actually tried booting using this
kernel because make didn't fail here.
The reason this happens within Nix and probably didn't yet surface in
other distros is that programs only have a limited amount of memory
available for storing the environment and the arguments.
Environment variables however are quite common on Nix and thus we
stumble on problems like this way earlier - in this case Linux 4.8 - but
I have noticed this in 4.7-next as well already.
The fix is far from perfect and suffers performance overhead because we
now run grep for every *.mod file instead of passing all *.mod files
into one single invocation of grep.
But comparing the performance overhead (around 1s on my machine) with
the overall build time of the kernel I think the overhead really is
neglicible.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
14 lines
492 B
Diff
14 lines
492 B
Diff
diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
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index 07650ee..934a7a8 100644
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--- a/scripts/Makefile.modinst
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+++ b/scripts/Makefile.modinst
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@@ -9,7 +9,8 @@ include scripts/Kbuild.include
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#
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-__modules := $(sort $(shell grep -h '\.ko$$' /dev/null $(wildcard $(MODVERDIR)/*.mod)))
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+__modules := $(sort $(foreach f,$(wildcard $(MODVERDIR)/*.mod),$(shell \
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+ grep -h '\.ko$$' '$f')))
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modules := $(patsubst %.o,%.ko,$(wildcard $(__modules:.ko=.o)))
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PHONY += $(modules)
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