Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751624AbdHPGt7 (ORCPT ); Wed, 16 Aug 2017 02:49:59 -0400 Received: from mga05.intel.com ([192.55.52.43]:64430 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751556AbdHPGt5 (ORCPT ); Wed, 16 Aug 2017 02:49:57 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.41,381,1498546800"; d="scan'208";a="119505271" From: Lan Tianyu Cc: Lan Tianyu , pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V2] KVM/x86: Increase max vcpu number to 8192 Date: Tue, 15 Aug 2017 20:43:23 -0400 Message-Id: <1502844203-10556-1-git-send-email-tianyu.lan@intel.com> X-Mailer: git-send-email 1.8.3.1 To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 821 Lines: 25 For HPC usage case, it will create a huge VM with vcpus number as same as host cpus and this requires more vcpus support in a single VM. This patch is to increase max vcpu number from 288 to 8192 which is current default maximum cpu number for Linux kernel. Signed-off-by: Lan Tianyu --- arch/x86/include/asm/kvm_host.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 87ac4fb..7946394 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -35,7 +35,7 @@ #include #include -#define KVM_MAX_VCPUS 288 +#define KVM_MAX_VCPUS 8192 #define KVM_SOFT_MAX_VCPUS 240 #define KVM_MAX_VCPU_ID 1023 #define KVM_USER_MEM_SLOTS 509 -- 1.8.3.1