From: Thomas Gleixner <tglx@linutronix.de>
To: "Borislav Petkov" <bp@alien8.de>, "Mateusz Jończyk" <mat.jonczyk@o2.pl>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Yinghai Lu <yinghai@kernel.org>,
Randy Dunlap <rdunlap@infradead.org>
Subject: Re: [PATCH v2 01/10] x86/Kconfig: enable X86_X2APIC by default and improve help text
Date: Thu, 01 Dec 2022 16:11:10 +0100 [thread overview]
Message-ID: <871qpjrwfl.ffs@tglx> (raw)
In-Reply-To: <Y1l+v3uG7tSUZfd0@zn.tnic>
On Wed, Oct 26 2022 at 20:38, Borislav Petkov wrote:
> On Sun, Sep 11, 2022 at 10:47:02AM +0200, Mateusz Jończyk wrote:
>> As many current platforms (most modern Intel CPUs and QEMU) have x2APIC
>> present, enable CONFIG_X86_X2APIC by default as it gives performance
>> and functionality benefits.
>
> Can we do that without any detriment to older systems which don't have
> x2APIC?
Can we please adjust to reality and do:
X86_X2APIC
bool
default y if X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST)
There is zero reason for having a knob.
Thanks,
tglx
next prev parent reply other threads:[~2022-12-01 15:11 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-11 8:47 [PATCH v2 00/10] x86: Kconfig cleanups and help text improvements Mateusz Jończyk
2022-09-11 8:47 ` [PATCH v2 01/10] x86/Kconfig: enable X86_X2APIC by default and improve help text Mateusz Jończyk
2022-10-26 18:38 ` Borislav Petkov
2022-12-01 15:11 ` Thomas Gleixner [this message]
2022-10-27 14:45 ` Elliott, Robert (Servers)
2022-10-27 15:07 ` Dave Hansen
2022-11-03 23:41 ` Elliott, Robert (Servers)
2022-11-04 17:29 ` Dave Hansen
2024-02-02 14:08 ` David Heidelberg
2024-02-15 21:10 ` Mateusz Jończyk
2024-02-20 16:26 ` David Heidelberg
2024-07-05 22:28 ` David Heidelberg
2022-09-11 8:47 ` [PATCH v2 02/10] x86/apic: fix panic message when x2APIC is not supported Mateusz Jończyk
2022-10-27 15:08 ` Elliott, Robert (Servers)
2022-09-11 8:47 ` [PATCH v2 03/10] x86/Kconfig: always enable ARCH_SPARSEMEM_ENABLE Mateusz Jończyk
2022-09-11 8:47 ` [PATCH v2 04/10] x86/Kconfig: drop X86_32_NON_STANDARD Mateusz Jończyk
2022-09-11 8:47 ` [PATCH v2 05/10] x86/Kconfig: move all X86_EXTENDED_PLATFORM options together Mateusz Jończyk
2022-09-11 8:47 ` [PATCH v2 06/10] x86/Kconfig: update lists in X86_EXTENDED_PLATFORM Mateusz Jończyk
2022-09-11 8:47 ` [PATCH v2 07/10] x86/Kconfig: document CONFIG_PCI_MMCONFIG Mateusz Jończyk
2022-09-11 8:47 ` [PATCH v2 08/10] x86/Kconfig: make CONFIG_PCI_CNB20LE_QUIRK depend on X86_32 Mateusz Jończyk
2022-09-13 22:50 ` Bjorn Helgaas
2022-09-11 8:47 ` [PATCH v2 09/10] x86/Kconfig: document release year of glibc 2.3.3 Mateusz Jończyk
2022-09-11 8:47 ` [PATCH v2 10/10] x86/Kconfig: remove CONFIG_ISA_BUS Mateusz Jończyk
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