From: Ben Gardon <bgardon@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>, kvm <kvm@vger.kernel.org>,
Peter Xu <peterx@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Peter Shier <pshier@google.com>,
Yulei Zhang <yulei.kernel@gmail.com>,
Wanpeng Li <kernellwp@gmail.com>,
Xiao Guangrong <xiaoguangrong.eric@gmail.com>,
Kai Huang <kai.huang@intel.com>,
Keqian Zhu <zhukeqian1@huawei.com>
Subject: Re: [PATCH v3 5/8] KVM: x86/mmu: Add a field to control memslot rmap allocation
Date: Mon, 10 May 2021 09:37:51 -0700 [thread overview]
Message-ID: <CANgfPd_uM+jXD=2m-EK-Vsz4UtB0hd-EFAA-m-y74fZf18rOpQ@mail.gmail.com> (raw)
In-Reply-To: <03e66630-b967-b91c-b74e-6944bdcaf2d7@redhat.com>
On Mon, May 10, 2021 at 9:33 AM Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> On 10/05/21 18:14, Ben Gardon wrote:
> >> Possibly stupid (or at least lazy) question: why can't it be a "normal"
> >> static inline function?
> > That was my initial approach (hence the leftover inline) but I got
> > some warnings about a forward declaration of struct kvm because
> > arch/x86/include/asm/kvm_host.h doesn't include virt/kvm/kvm_host.h.
> > Maybe there's a way to fix that, but I didn't want to mess with it.
> >
>
> Let's just use the field directly.
That works for me too. I moved to the wrapper because adding the
smp_load_acquire and a comment explaining why we were doing that
looked bloated and I thought it would be easier to document in one
place, but it's not that much bloat, and having the subtleties
documented directly in the function is probably clearer for readers
anyway.
>
> Paolo
>
next prev parent reply other threads:[~2021-05-10 16:38 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-06 18:42 [PATCH v3 0/8] Lazily allocate memslot rmaps Ben Gardon
2021-05-06 18:42 ` [PATCH v3 1/8] KVM: x86/mmu: Deduplicate rmap freeing Ben Gardon
2021-05-07 7:42 ` David Hildenbrand
2021-05-06 18:42 ` [PATCH v3 2/8] KVM: x86/mmu: Factor out allocating memslot rmap Ben Gardon
2021-05-07 7:46 ` David Hildenbrand
2021-05-10 16:29 ` Ben Gardon
2021-05-06 18:42 ` [PATCH v3 3/8] KVM: mmu: Refactor memslot copy Ben Gardon
2021-05-07 7:48 ` David Hildenbrand
2021-05-06 18:42 ` [PATCH v3 4/8] KVM: mmu: Add slots_arch_lock for memslot arch fields Ben Gardon
2021-05-06 18:42 ` [PATCH v3 5/8] KVM: x86/mmu: Add a field to control memslot rmap allocation Ben Gardon
2021-05-06 23:44 ` Ben Gardon
2021-05-07 7:50 ` David Hildenbrand
2021-05-07 8:28 ` Paolo Bonzini
2021-05-10 16:14 ` Ben Gardon
2021-05-10 16:33 ` Paolo Bonzini
2021-05-10 16:37 ` Ben Gardon [this message]
2021-05-06 18:42 ` [PATCH v3 6/8] KVM: x86/mmu: Skip rmap operations if rmaps not allocated Ben Gardon
2021-05-06 23:07 ` kernel test robot
2021-05-06 18:42 ` [PATCH v3 7/8] KVM: x86/mmu: Protect rmaps independently with SRCU Ben Gardon
2021-05-06 23:58 ` kernel test robot
2021-05-07 0:56 ` kernel test robot
2021-05-07 8:42 ` Paolo Bonzini
2021-05-10 17:45 ` Sean Christopherson
2021-05-10 17:53 ` Paolo Bonzini
2021-05-10 18:28 ` Sean Christopherson
2021-05-11 16:22 ` Ben Gardon
2021-05-11 16:45 ` Paolo Bonzini
2021-05-06 18:42 ` [PATCH v3 8/8] KVM: x86/mmu: Lazily allocate memslot rmaps Ben Gardon
2021-05-07 1:10 ` kernel test robot
2021-05-07 8:28 ` Paolo Bonzini
2021-05-07 7:40 ` [PATCH v3 0/8] " David Hildenbrand
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