summaryrefslogtreecommitdiff
path: root/tools/objtool/include
diff options
context:
space:
mode:
authorPeter Zijlstra <peterz@infradead.org>2021-06-11 09:33:36 +0300
committerPeter Zijlstra <peterz@infradead.org>2021-06-14 15:05:36 +0300
commitd33b9035e14a35f6f2a5f067f0b156a93581811d (patch)
treec1ea88952eeffb4a3b2967108fe769e7369f7f36 /tools/objtool/include
parentc199f64ff93c48a45add92eee4456ffcabfc838e (diff)
downloadlinux-d33b9035e14a35f6f2a5f067f0b156a93581811d.tar.xz
objtool: Improve reloc hash size guestimate
Nathan reported that LLVM ThinLTO builds have a performance regression with commit 25cf0d8aa2a3 ("objtool: Rewrite hashtable sizing"). Sami was quick to note that this is due to their use of -ffunction-sections. As a result the .text section is small and basing the number of relocs off of that no longer works. Instead have read_sections() compute the sum of all SHF_EXECINSTR sections and use that. Fixes: 25cf0d8aa2a3 ("objtool: Rewrite hashtable sizing") Reported-by: Nathan Chancellor <nathan@kernel.org> Debugged-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Nathan Chancellor <nathan@kernel.org> Link: https://lkml.kernel.org/r/YMJpGLuGNsGtA5JJ@hirez.programming.kicks-ass.net
Diffstat (limited to 'tools/objtool/include')
-rw-r--r--tools/objtool/include/objtool/elf.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h
index 90082751f851..e34395047530 100644
--- a/tools/objtool/include/objtool/elf.h
+++ b/tools/objtool/include/objtool/elf.h
@@ -83,6 +83,7 @@ struct elf {
int fd;
bool changed;
char *name;
+ unsigned int text_size;
struct list_head sections;
int symbol_bits;