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From: Thomas Gleixner <tglx@linutronix.de>
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To: Sasha Levin <sashal@kernel.org>, linux-kernel@vger.kernel.org,
 stable@vger.kernel.org
Cc: David Wang <00107082@163.com>, Huacai Chen <chenhuacai@loongson.cn>,
 Sasha Levin <sashal@kernel.org>, chenhuacai@kernel.org,
 maobibo@loongson.cn, wangliupu@loongson.cn, lvjianmin@loongson.cn,
 zhangtianyang@loongson.cn, loongarch@lists.linux.dev
Subject: Re: [PATCH AUTOSEL 6.12 18/36] LoongArch/irq: Use
 seq_put_decimal_ull_width() for decimal values
In-Reply-To: <20241211185028.3841047-18-sashal@kernel.org>
References: <20241211185028.3841047-1-sashal@kernel.org>
 <20241211185028.3841047-18-sashal@kernel.org>
Date: Wed, 11 Dec 2024 20:14:18 +0100
Message-ID: <87zfl29gmt.ffs@tglx>
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On Wed, Dec 11 2024 at 13:49, Sasha Levin wrote:
> From: David Wang <00107082@163.com>
>
> [ Upstream commit ad2a05a6d287aef7e069c06e329f1355756415c2 ]
>
> Performance improvement for reading /proc/interrupts on LoongArch.
>
> On a system with n CPUs and m interrupts, there will be n*m decimal
> values yielded via seq_printf(.."%10u "..) which is less efficient than
> seq_put_decimal_ull_width(), stress reading /proc/interrupts indicates
> ~30% performance improvement with this patch (and its friends).

Why is this stable material?

Thanks,

        tglx