linux-kernel - Re: [PATCH 5.4 0/2] Backports "x86, sched: Treat Intel SNC topology as default, COD as exception"

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Message-ID: <A969D4BF-D21B-4AB0-97AE-5C881C6F187D@oracle.com>
Date:   Wed, 16 Jun 2021 22:59:46 +0000
From:   Sherry Yang <sherry.yang@...cle.com>
To:     "mingo@...hat.com" <mingo@...hat.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "bp@...en8.de" <bp@...en8.de>
CC:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Sherry Yang <sherry.yang@...cle.com>
Subject: Re: [PATCH 5.4 0/2] Backports "x86, sched: Treat Intel SNC topology
 as default, COD as exception"


> On Jun 7, 2021, at 5:37 PM, Sherry Yang <sherry.yang@...cle.com> wrote:
> 
> Could you also backport these two commits
> adefe55e7258 ("x86/kernel: Convert to new CPU match macros")
> 2c88d45edbb8 ("x86, sched: Treat Intel SNC topology as default,
> COD as exception") to 5.4.y?
> 
> Commit adefe55e7258 ("x86/kernel: Convert to new CPU match macros")
> is a prerequisite of the second commit. There are conflicts while
> cherry-picking commit adefe55e7258 ("x86/kernel: Convert to new
> CPU match macros"), which are caused by a later commit
> c84cb3735fd5 ("x86/apic: Move TSC deadline timer debug printk").
> Keep the later code base.
> 
> Alison Schofield (1):
>  x86, sched: Treat Intel SNC topology as default, COD as exception
> 
> Thomas Gleixner (1):
>  x86/kernel: Convert to new CPU match macros
> 
> arch/x86/kernel/apic/apic.c | 32 ++++++-------
> arch/x86/kernel/smpboot.c   | 90 +++++++++++++++++++------------------
> arch/x86/kernel/tsc_msr.c   | 14 +++---
> arch/x86/power/cpu.c        | 16 +------
> 4 files changed, 68 insertions(+), 84 deletions(-)
> 
> -- 
> 2.27.0
> 

Hi,
 
We have seen that the warning “sched: CPU #20's llc-sibling CPU #0 is not on 
the same node! [node: 1 != 0]. Ignoring dependency. ” applies to 5.4 but we don’t 
observe the fix in 5.4. I'm sending this email to apply the fix from upstream 
2c88d45edbb8 ("x86, sched: Treat Intel SNC topology as default, COD as 
exception") to 5.4 and also resolve the dependency conflict caused by 
prerequisite commit adefe55e7258 ("x86/kernel: Convert to new CPU match 
macros”) by keeping the later code base, please refer to the
previous two patches for the detail.
 
Thanks,
Sherry