From: Greg KH <gregkh@linuxfoundation.org>
To: wujing <realwujing@qq.com>
Cc: sasha.levin@linux.microsoft.com, mingo@redhat.com,
peterz@infradead.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, wujing <realwujing@gmail.com>,
QiLiang Yuan <yuanql9@chinatelecom.cn>
Subject: Re: [PATCH] sched/fair: Correct CPU selection from isolated domain
Date: Mon, 6 Jan 2025 10:51:38 +0100 [thread overview]
Message-ID: <2025010654-underpay-habitant-fb9e@gregkh> (raw)
In-Reply-To: <tencent_160A5B6C838FD9A915A67E67914350EB1806@qq.com>
On Mon, Jan 06, 2025 at 05:26:34PM +0800, wujing wrote:
> From: wujing <realwujing@gmail.com>
>
> We encountered an issue where the kernel thread `ksmd` runs on the PMD
> dedicated isolated core, leading to high latency in OVS packets.
>
> Upon analysis, we discovered that this is caused by the current
> select_idle_smt() function not taking the sched_domain mask into account.
>
> Kernel version: linux-4.19.y
You do know that 4.19.y is long end-of-life and totally insecure and
nothing that you should be using in anything, right? Please move to a
more modern kernel version.
good luck!
greg k-h
prev parent reply other threads:[~2025-01-06 9:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-06 9:26 [PATCH] sched/fair: Correct CPU selection from isolated domain wujing
2025-01-06 9:51 ` Greg KH [this message]
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