JIRA: https://issues.redhat.com/browse/RHEL-28063
Conflicts: Slight source diff due to omitted commits from upstream.
commit 4074532758c5c367d3fcb8d124150824a254659d
Author: Jack Brennen <jbrennen@google.com>
Date: Tue Sep 26 08:40:44 2023 -0400
modpost: Optimize symbol search from linear to binary search
Modify modpost to use binary search for converting addresses back
into symbol references. Previously it used linear search.
This change saves a few seconds of wall time for defconfig builds,
but can save several minutes on allyesconfigs.
Before:
$ make LLVM=1 -j128 allyesconfig vmlinux -s KCFLAGS="-Wno-error"
$ time scripts/mod/modpost -M -m -a -N -o vmlinux.symvers vmlinux.o
198.38user 1.27system 3:19.71elapsed
After:
$ make LLVM=1 -j128 allyesconfig vmlinux -s KCFLAGS="-Wno-error"
$ time scripts/mod/modpost -M -m -a -N -o vmlinux.symvers vmlinux.o
11.91user 0.85system 0:12.78elapsed
Signed-off-by: Jack Brennen <jbrennen@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Donald Dutile <ddutile@redhat.com>
Donald Dutile