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| author | Nick Desaulniers <ndesaulniers@google.com> | 2023-06-23 10:06:17 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-06-25 16:30:50 -0700 |
| commit | f7584322e4fef794b290e5fdb290fa92a925236e (patch) | |
| tree | 3175361513e0c9ea240f7ae92f7df144fec56ab6 /arch | |
| parent | c828856b51bb4180c0803c12ffaeb86c41336c11 (diff) | |
| download | linux-stable-f7584322e4fef794b290e5fdb290fa92a925236e.tar.gz linux-stable-f7584322e4fef794b290e5fdb290fa92a925236e.tar.bz2 linux-stable-f7584322e4fef794b290e5fdb290fa92a925236e.zip | |
riscv: disable HAVE_LD_DEAD_CODE_DATA_ELIMINATION for LLD
Linking allyesconfig with ld.lld-17 with CONFIG_DEAD_CODE_ELIMINATION=y
takes hours. Assuming this is a performance regression that can be
fixed, tentatively disable this for now so that allyesconfig builds
don't start timing out. If and when there's a fix to ld.lld, this can
be converted to a version check instead so that users of older but still
supported versions of ld.lld don't hurt themselves by enabling
CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y.
Link: https://github.com/ClangBuiltLinux/linux/issues/1881
Link: https://lore.kernel.org/linux-riscv/ZJXTwqZIkXLxXaSi@google.com/
Reported-by: Palmer Dabbelt <palmer@dabbelt.com>
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/Kconfig | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 62e84fee2cfd..a8a9387eb284 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -115,7 +115,8 @@ config RISCV select HAVE_KPROBES if !XIP_KERNEL select HAVE_KPROBES_ON_FTRACE if !XIP_KERNEL select HAVE_KRETPROBES if !XIP_KERNEL - select HAVE_LD_DEAD_CODE_DATA_ELIMINATION + # https://github.com/ClangBuiltLinux/linux/issues/1881 + select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if !LD_IS_LLD select HAVE_MOVE_PMD select HAVE_MOVE_PUD select HAVE_PCI |