From: Sean Christopherson <seanjc@google.com>
To: Vipin Sharma <vipinsh@google.com>
Cc: pbonzini@redhat.com, bgardon@google.com, dmatlack@google.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [Patch v3 0/7] Optimize clear dirty log
Date: Tue, 21 Mar 2023 14:38:22 -0700 [thread overview]
Message-ID: <ZBojzhwQcFJrY4jw@google.com> (raw)
In-Reply-To: <ZBoMIJipRtmvsNXg@google.com>
On Tue, Mar 21, 2023, Sean Christopherson wrote:
> It won't. MMU_WARN_ON() is dead code without manual modification to define MMU_DEBUG.
> Part of the reason I used MMU_WARN_ON() was to remind myself to send a patch/series
> to overhaul MMU_WARN_ON[*]. My thought/hope is that a Kconfig will allow developers
> and testers to run with a pile of assertions and sanity checks without impacting
> the runtime overhead for production builds.
>
> [*] https://lore.kernel.org/all/Yz4Qi7cn7TWTWQjj@google.com/
Ugh, I'm definitely sending that patch, MMU_DEBUG has bitrotted and broken the
build yet again.
arch/x86/kvm/mmu/mmu.c: In function ‘kvm_mmu_free_shadow_page’:
arch/x86/kvm/mmu/mmu.c:1738:15: error: implicit declaration of function ‘is_empty_shadow_page’; did you mean ‘to_shadow_page’? [-Werror=implicit-function-declaration]
1738 | MMU_WARN_ON(!is_empty_shadow_page(sp->spt));
| ^~~~~~~~~~~~~~~~~~~~
include/asm-generic/bug.h:110:25: note: in definition of macro ‘WARN_ON_ONCE’
110 | int __ret_warn_on = !!(condition); \
| ^~~~~~~~~
arch/x86/kvm/mmu/mmu.c:1738:2: note: in expansion of macro ‘MMU_WARN_ON’
1738 | MMU_WARN_ON(!is_empty_shadow_page(sp->spt));
| ^~~~~~~~~~~
prev parent reply other threads:[~2023-03-21 21:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-11 1:46 [Patch v3 0/7] Optimize clear dirty log Vipin Sharma
2023-02-11 1:46 ` [Patch v3 1/7] KVM: x86/mmu: Add a helper function to check if an SPTE needs atomic write Vipin Sharma
2023-02-11 1:46 ` [Patch v3 2/7] KVM: x86/mmu: Atomically clear SPTE dirty state in the clear-dirty-log flow Vipin Sharma
2023-02-15 21:12 ` David Matlack
2023-03-17 22:59 ` Sean Christopherson
2023-03-17 23:50 ` Vipin Sharma
2023-02-11 1:46 ` [Patch v3 3/7] KVM: x86/mmu: Remove "record_dirty_log" in __tdp_mmu_set_spte() Vipin Sharma
2023-02-15 21:10 ` David Matlack
2023-02-11 1:46 ` [Patch v3 4/7] KVM: x86/mmu: Optimize SPTE change for aging gfn range Vipin Sharma
2023-02-15 21:15 ` David Matlack
2023-03-21 0:51 ` Sean Christopherson
2023-02-11 1:46 ` [Patch v3 5/7] KVM: x86/mmu: Remove "record_acc_track" in __tdp_mmu_set_spte() Vipin Sharma
2023-02-22 19:31 ` David Matlack
2023-02-11 1:46 ` [Patch v3 6/7] KVM: x86/mmu: Remove handle_changed_spte_dirty_log() Vipin Sharma
2023-02-22 19:36 ` David Matlack
2023-02-11 1:46 ` [Patch v3 7/7] KVM: x86/mmu: Merge all handle_changed_pte* functions Vipin Sharma
2023-02-22 19:42 ` David Matlack
2023-03-17 22:51 ` Sean Christopherson
2023-03-17 23:48 ` Vipin Sharma
2023-03-17 22:57 ` [Patch v3 0/7] Optimize clear dirty log Sean Christopherson
2023-03-17 23:51 ` Vipin Sharma
2023-03-21 0:41 ` Sean Christopherson
2023-03-21 18:11 ` Vipin Sharma
2023-03-21 19:57 ` Sean Christopherson
2023-03-21 20:40 ` Sean Christopherson
2023-03-21 21:38 ` Sean Christopherson [this message]
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