Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757366Ab0FOCuf (ORCPT ); Mon, 14 Jun 2010 22:50:35 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:60387 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1756369Ab0FOCub (ORCPT ); Mon, 14 Jun 2010 22:50:31 -0400 Message-ID: <4C16E9A0.9080808@cn.fujitsu.com> Date: Tue, 15 Jun 2010 10:46:56 +0800 From: Xiao Guangrong User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: Avi Kivity CC: Marcelo Tosatti , LKML , KVM list Subject: [PATCH 4/6] KVM: MMU: introduce mmu_topup_memory_cache_atomic() References: <4C16E6ED.7020009@cn.fujitsu.com> <4C16E75F.6020003@cn.fujitsu.com> <4C16E7AD.1060101@cn.fujitsu.com> <4C16E7F4.5060801@cn.fujitsu.com> In-Reply-To: <4C16E7F4.5060801@cn.fujitsu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2223 Lines: 73 Introduce mmu_topup_memory_cache_atomic(), it support topup memory cache in atomic context. And, when we prefetch pte, we need topup the rmap's cache Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 29 +++++++++++++++++++++++++---- 1 files changed, 25 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 734b106..92ff099 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -290,15 +290,16 @@ static void __set_spte(u64 *sptep, u64 spte) #endif } -static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, - struct kmem_cache *base_cache, int min) +static int __mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, + struct kmem_cache *base_cache, int min, + int max, gfp_t flags) { void *obj; if (cache->nobjs >= min) return 0; - while (cache->nobjs < ARRAY_SIZE(cache->objects)) { - obj = kmem_cache_zalloc(base_cache, GFP_KERNEL); + while (cache->nobjs < max) { + obj = kmem_cache_zalloc(base_cache, flags); if (!obj) return -ENOMEM; cache->objects[cache->nobjs++] = obj; @@ -306,6 +307,26 @@ static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, return 0; } +static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, + struct kmem_cache *base_cache, int min) +{ + return __mmu_topup_memory_cache(cache, base_cache, min, + ARRAY_SIZE(cache->objects), GFP_KERNEL); +} + +static int mmu_topup_memory_cache_atomic(struct kvm_mmu_memory_cache *cache, + struct kmem_cache *base_cache, int min) +{ + return __mmu_topup_memory_cache(cache, base_cache, min, min, + GFP_ATOMIC); +} + +static int pte_prefetch_topup_memory_cache(struct kvm_vcpu *vcpu) +{ + return mmu_topup_memory_cache_atomic(&vcpu->arch.mmu_rmap_desc_cache, + rmap_desc_cache, 1); +} + static void mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc, struct kmem_cache *cache) { -- 1.6.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/