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From: Andy Lutomirski <luto@kernel.org>
To: Nadav Amit <namit@vmware.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Andy Lutomirski <luto@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	X86 ML <x86@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Sasha Levin <sashal@kernel.org>, Juergen Gross <jgross@suse.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	linux-hyperv@vger.kernel.org,
	Linux Virtualization <virtualization@lists.linux-foundation.org>,
	kvm list <kvm@vger.kernel.org>,
	xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH 4/9] x86/mm/tlb: Flush remote and local TLBs concurrently
Date: Tue, 25 Jun 2019 20:36:59 -0700
Message-ID: <CALCETrXyJ8y7PSqf+RmGKjM4VSLXmNEGi6K=Jzw4jmckRQECTg@mail.gmail.com> (raw)
In-Reply-To: <20190613064813.8102-5-namit@vmware.com>

On Wed, Jun 12, 2019 at 11:49 PM Nadav Amit <namit@vmware.com> wrote:
>
> To improve TLB shootdown performance, flush the remote and local TLBs
> concurrently. Introduce flush_tlb_multi() that does so. The current
> flush_tlb_others() interface is kept, since paravirtual interfaces need
> to be adapted first before it can be removed. This is left for future
> work. In such PV environments, TLB flushes are not performed, at this
> time, concurrently.

Would it be straightforward to have a default PV flush_tlb_multi()
that uses flush_tlb_others() under the hood?

  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190613064813.8102-1-namit@vmware.com>
2019-06-13  6:48 ` Nadav Amit
2019-06-25 21:29   ` Dave Hansen
2019-06-26  2:35     ` Nadav Amit
2019-06-26  3:00       ` Dave Hansen
2019-06-26  3:32         ` Nadav Amit
2019-06-26  3:36   ` Andy Lutomirski [this message]
2019-06-26  3:48     ` Nadav Amit
2019-06-26  3:51       ` Andy Lutomirski
2019-06-13  6:48 ` [PATCH 6/9] KVM: x86: Provide paravirtualized flush_tlb_multi() Nadav Amit
2019-06-25 21:40   ` Dave Hansen
2019-06-26  2:39     ` Nadav Amit
2019-06-26  3:35       ` Andy Lutomirski
2019-06-26  3:41         ` Nadav Amit
2019-06-26  3:56           ` Andy Lutomirski
2019-06-26  6:30             ` Nadav Amit
2019-06-26 16:37               ` Andy Lutomirski
2019-06-26 17:41                 ` Vitaly Kuznetsov
2019-06-26 18:21                   ` Andy Lutomirski

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