linux-kernel - Re: [PATCH v7 0/5] LoongArch: Support toolchain with new relocation types

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Message-ID: <d2036602cfd927578272041823465e6c23e7240b.camel@xry111.site>
Date:   Thu, 01 Sep 2022 10:26:38 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     Huacai Chen <chenhuacai@...nel.org>
Cc:     Jinyang He <hejinyang@...ngson.cn>,
        WANG Xuerui <kernel@...0n.name>, loongarch@...ts.linux.dev,
        LKML <linux-kernel@...r.kernel.org>,
        Youling Tang <tangyouling@...ngson.cn>
Subject: Re: [PATCH v7 0/5] LoongArch: Support toolchain with new relocation
 types

On Thu, 2022-09-01 at 10:17 +0800, Huacai Chen wrote:

> Now all global variable accesses are via got, I think the performance
> may be much worse than before when we didn't use explicit-relocs.
> I don't know whether "a new code model" or your "(1)(2)(3)" is easier
> to implement, but I think it is better to solve the performance issue
> before 6.1-rc1.

Both won't be too difficult, but I need to debate with toolchain
developers :(.

If we are running out of time:

cflags-y += $(cc-option -mno-explicit-relocs)

This will at least make the new toolchain work, though we cannot be
benefited from the optimizations allowed by explicit relocations.

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University