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Date:   Wed, 25 Mar 2020 13:10:33 +0100 (CET)
From:   Miroslav Benes <mbenes@suse.cz>
To:     Peter Zijlstra <peterz@infradead.org>
cc:     tglx@linutronix.de, jpoimboe@redhat.com,
        linux-kernel@vger.kernel.org, x86@kernel.org, mhiramat@kernel.org,
        brgerst@gmail.com
Subject: Re: [PATCH v3 14/26] objtool: Optimize read_sections()
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References: <20200324153113.098167666@infradead.org> <20200324160924.739153726@infradead.org>
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On Tue, 24 Mar 2020, Peter Zijlstra wrote:

> Perf showed that __hash_init() is a significant portion of
> read_sections(), so instead of doing a per section rela_hash, use an
> elf-wide rela_hash.
> 
> Statistics show us there are about 1.1 million relas, so size it
> accordingly.
> 
> This reduces the objtool on vmlinux.o runtime to a third, from 15 to 5
> seconds.
> 
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>

Reviewed-by: Miroslav Benes <mbenes@suse.cz>

M