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author | Josh Poimboeuf <jpoimboe@redhat.com> | 2016-03-09 00:07:00 -0600 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-03-09 10:48:10 +0100 |
commit | 042ba73fe7eb63872ee2d6ac86410052210c1f16 (patch) | |
tree | 6f3efe312fc1f2716f0f477a5860a3b6aed3e351 /MAINTAINERS | |
parent | 1698872b5c772aebc5c43ca445cc0a79f12b9fcc (diff) | |
download | linux-042ba73fe7eb63872ee2d6ac86410052210c1f16.tar.gz linux-042ba73fe7eb63872ee2d6ac86410052210c1f16.tar.bz2 linux-042ba73fe7eb63872ee2d6ac86410052210c1f16.zip |
objtool: Add several performance improvements
Use hash tables for instruction and rela lookups (and keep the linked
lists around for sequential access).
Also cache the section struct for the "__func_stack_frame_non_standard"
section.
With this change, "objtool check net/wireless/nl80211.o" goes from:
real 0m1.168s
user 0m1.163s
sys 0m0.005s
to:
real 0m0.059s
user 0m0.042s
sys 0m0.017s
for a 20x speedup.
With the same object, it should be noted that the memory heap usage grew
from 8MB to 62MB. Reducing the memory usage is on the TODO list.
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Chris J Arges <chris.j.arges@canonical.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Pedro Alves <palves@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: live-patching@vger.kernel.org
Link: http://lkml.kernel.org/r/dd0d8e1449506cfa7701b4e7ba73577077c44253.1457502970.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'MAINTAINERS')
0 files changed, 0 insertions, 0 deletions