From: Peter Zijlstra <peterz@infradead.org>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: x86@kernel.org, jgross@suse.com, mbenes@suze.cz,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/9] objtool: Rework rebuild_reloc logic
Date: Wed, 17 Mar 2021 09:12:15 +0100 [thread overview]
Message-ID: <YFG53wkgw6nDBgIl@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20210317033417.lbwemc2j2cpsdlzd@treble>
On Tue, Mar 16, 2021 at 10:34:17PM -0500, Josh Poimboeuf wrote:
> On Fri, Mar 12, 2021 at 06:16:18PM +0100, Peter Zijlstra wrote:
> > --- a/tools/objtool/elf.c
> > +++ b/tools/objtool/elf.c
> > @@ -479,6 +479,8 @@ void elf_add_reloc(struct elf *elf, stru
> >
> > list_add_tail(&reloc->list, &sec->reloc_list);
> > elf_hash_add(elf->reloc_hash, &reloc->hash, reloc_hash(reloc));
> > +
> > + sec->rereloc = true;
> > }
>
> Can we just reuse sec->changed for this? Something like this on top
> (untested of course):
I think my worry was that we'd dirty too much and slow down the write,
but I haven't done any actual performance measurements on this.
Let me do a few runs and see if it matters at all.
next prev parent reply other threads:[~2021-03-17 8:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-12 17:16 [PATCH 0/9] x86,objtool: Optimize !RETPOLINE Peter Zijlstra
2021-03-12 17:16 ` [PATCH 1/9] x86/retpoline: Simplify retpolines Peter Zijlstra
2021-03-12 17:16 ` [PATCH 2/9] objtool: Correctly handle retpoline thunk calls Peter Zijlstra
2021-03-16 21:19 ` Josh Poimboeuf
2021-03-12 17:16 ` [PATCH 3/9] objtool: Per arch retpoline naming Peter Zijlstra
2021-03-12 17:16 ` [PATCH 4/9] objtool: Fix static_call list generation Peter Zijlstra
2021-03-17 3:18 ` Josh Poimboeuf
2021-03-12 17:16 ` [PATCH 5/9] objtool: Rework rebuild_reloc logic Peter Zijlstra
2021-03-17 3:34 ` Josh Poimboeuf
2021-03-17 8:12 ` Peter Zijlstra [this message]
2021-03-18 0:49 ` Josh Poimboeuf
2021-03-18 12:57 ` Peter Zijlstra
2021-03-18 16:36 ` Josh Poimboeuf
2021-03-18 17:04 ` Peter Zijlstra
2021-03-18 17:38 ` Josh Poimboeuf
2021-03-19 0:19 ` Josh Poimboeuf
2021-03-19 9:22 ` Peter Zijlstra
2021-03-19 15:15 ` Josh Poimboeuf
2021-03-12 17:16 ` [PATCH 6/9] objtool: Add elf_create_undef_symbol() Peter Zijlstra
2021-03-17 13:52 ` Miroslav Benes
2021-03-17 14:13 ` Peter Zijlstra
2021-03-17 14:39 ` Miroslav Benes
2021-03-17 15:08 ` Sami Tolvanen
2021-03-18 0:46 ` Josh Poimboeuf
2021-03-18 7:56 ` Peter Zijlstra
2021-03-12 17:16 ` [PATCH 7/9] objtool: Allow archs to rewrite retpolines Peter Zijlstra
2021-03-12 17:16 ` [PATCH 8/9] objtool: Skip magical retpoline .altinstr_replacement Peter Zijlstra
2021-03-12 17:16 ` [PATCH 9/9] objtool,x86: Rewrite retpoline thunk calls Peter Zijlstra
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