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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id pj11sm635689ejb.58.2021.01.27.02.54.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 27 Jan 2021 02:54:35 -0800 (PST) Subject: Re: [PATCH] KVM: x86/mmu: Add '__func__' in rmap_printk() To: Stephen Zhang , seanjc@google.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org References: <1611713325-3591-1-git-send-email-stephenzhangzsd@gmail.com> From: Paolo Bonzini Message-ID: <244f1c7f-d6ca-bd7c-da5e-8da3bf8b5aee@redhat.com> Date: Wed, 27 Jan 2021 11:54:34 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <1611713325-3591-1-git-send-email-stephenzhangzsd@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 27/01/21 03:08, Stephen Zhang wrote: > Given the common pattern: > > rmap_printk("%s:"..., __func__,...) > > we could improve this by adding '__func__' in rmap_printk(). > > Signed-off-by: Stephen Zhang > --- > arch/x86/kvm/mmu/mmu.c | 20 ++++++++++---------- > arch/x86/kvm/mmu/mmu_internal.h | 2 +- > 2 files changed, 11 insertions(+), 11 deletions(-) > > diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c > index 6d16481..1460705 100644 > --- a/arch/x86/kvm/mmu/mmu.c > +++ b/arch/x86/kvm/mmu/mmu.c > @@ -844,17 +844,17 @@ static int pte_list_add(struct kvm_vcpu *vcpu, u64 *spte, > int i, count = 0; > > if (!rmap_head->val) { > - rmap_printk("pte_list_add: %p %llx 0->1\n", spte, *spte); > + rmap_printk("%p %llx 0->1\n", spte, *spte); > rmap_head->val = (unsigned long)spte; > } else if (!(rmap_head->val & 1)) { > - rmap_printk("pte_list_add: %p %llx 1->many\n", spte, *spte); > + rmap_printk("%p %llx 1->many\n", spte, *spte); > desc = mmu_alloc_pte_list_desc(vcpu); > desc->sptes[0] = (u64 *)rmap_head->val; > desc->sptes[1] = spte; > rmap_head->val = (unsigned long)desc | 1; > ++count; > } else { > - rmap_printk("pte_list_add: %p %llx many->many\n", spte, *spte); > + rmap_printk("%p %llx many->many\n", spte, *spte); > desc = (struct pte_list_desc *)(rmap_head->val & ~1ul); > while (desc->sptes[PTE_LIST_EXT-1]) { > count += PTE_LIST_EXT; > @@ -906,14 +906,14 @@ static void __pte_list_remove(u64 *spte, struct kvm_rmap_head *rmap_head) > pr_err("%s: %p 0->BUG\n", __func__, spte); > BUG(); > } else if (!(rmap_head->val & 1)) { > - rmap_printk("%s: %p 1->0\n", __func__, spte); > + rmap_printk("%p 1->0\n", spte); > if ((u64 *)rmap_head->val != spte) { > pr_err("%s: %p 1->BUG\n", __func__, spte); > BUG(); > } > rmap_head->val = 0; > } else { > - rmap_printk("%s: %p many->many\n", __func__, spte); > + rmap_printk("%p many->many\n", spte); > desc = (struct pte_list_desc *)(rmap_head->val & ~1ul); > prev_desc = NULL; > while (desc) { > @@ -1115,7 +1115,7 @@ static bool spte_write_protect(u64 *sptep, bool pt_protect) > !(pt_protect && spte_can_locklessly_be_made_writable(spte))) > return false; > > - rmap_printk("rmap_write_protect: spte %p %llx\n", sptep, *sptep); > + rmap_printk("spte %p %llx\n", sptep, *sptep); > > if (pt_protect) > spte &= ~SPTE_MMU_WRITEABLE; > @@ -1142,7 +1142,7 @@ static bool spte_clear_dirty(u64 *sptep) > { > u64 spte = *sptep; > > - rmap_printk("rmap_clear_dirty: spte %p %llx\n", sptep, *sptep); > + rmap_printk("spte %p %llx\n", sptep, *sptep); > > MMU_WARN_ON(!spte_ad_enabled(spte)); > spte &= ~shadow_dirty_mask; > @@ -1184,7 +1184,7 @@ static bool spte_set_dirty(u64 *sptep) > { > u64 spte = *sptep; > > - rmap_printk("rmap_set_dirty: spte %p %llx\n", sptep, *sptep); > + rmap_printk("spte %p %llx\n", sptep, *sptep); > > /* > * Similar to the !kvm_x86_ops.slot_disable_log_dirty case, > @@ -1331,7 +1331,7 @@ static bool kvm_zap_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head) > bool flush = false; > > while ((sptep = rmap_get_first(rmap_head, &iter))) { > - rmap_printk("%s: spte %p %llx.\n", __func__, sptep, *sptep); > + rmap_printk("spte %p %llx.\n", sptep, *sptep); > > pte_list_remove(rmap_head, sptep); > flush = true; > @@ -1363,7 +1363,7 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head, > > restart: > for_each_rmap_spte(rmap_head, &iter, sptep) { > - rmap_printk("kvm_set_pte_rmapp: spte %p %llx gfn %llx (%d)\n", > + rmap_printk("spte %p %llx gfn %llx (%d)\n", > sptep, *sptep, gfn, level); > > need_flush = 1; > diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h > index bfc6389..5ec15e4 100644 > --- a/arch/x86/kvm/mmu/mmu_internal.h > +++ b/arch/x86/kvm/mmu/mmu_internal.h > @@ -12,7 +12,7 @@ > extern bool dbg; > > #define pgprintk(x...) do { if (dbg) printk(x); } while (0) > -#define rmap_printk(x...) do { if (dbg) printk(x); } while (0) > +#define rmap_printk(fmt, args...) do { if (dbg) printk("%s: " fmt, __func__, ## args); } while (0) > #define MMU_WARN_ON(x) WARN_ON(x) > #else > #define pgprintk(x...) do { } while (0) > Queued, thanks. Paolo