From: Dave Hansen <dave.hansen@intel.com>
To: Nadav Amit <namit@vmware.com>,
Peter Zijlstra <peterz@infradead.org>,
Andy Lutomirski <luto@kernel.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org
Subject: Re: [PATCH 6/9] KVM: x86: Provide paravirtualized flush_tlb_multi()
Date: Tue, 25 Jun 2019 14:40:48 -0700 [thread overview]
Message-ID: <cb28f2b4-92f0-f075-648e-dddfdbdd2e3c@intel.com> (raw)
In-Reply-To: <20190613064813.8102-7-namit@vmware.com>
On 6/12/19 11:48 PM, Nadav Amit wrote:
> Support the new interface of flush_tlb_multi, which also flushes the
> local CPU's TLB, instead of flush_tlb_others that does not. This
> interface is more performant since it parallelize remote and local TLB
> flushes.
>
> The actual implementation of flush_tlb_multi() is almost identical to
> that of flush_tlb_others().
This confused me a bit. I thought we didn't support paravirtualized
flush_tlb_multi() from reading earlier in the series.
But, it seems like that might be Xen-only and doesn't apply to KVM and
paravirtualized KVM has no problem supporting flush_tlb_multi(). Is
that right? It might be good to include some of that background in the
changelog to set the context.
next prev parent reply other threads:[~2019-06-25 21:40 UTC|newest]
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 ` [PATCH 4/9] x86/mm/tlb: Flush remote and local TLBs concurrently 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
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 [this message]
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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