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Message-ID: <e800ba74-0ff6-8d98-8978-62c02cf1f8ea@intel.com>
Date:   Mon, 11 Apr 2022 16:45:23 -0700
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Subject: Re: [PATCH] x86/tsx: fix KVM guest live migration for tsx=on
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To:     Jon Kohler <jon@nutanix.com>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        "x86@kernel.org" <x86@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Tony Luck <tony.luck@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Borislav Petkov <bp@suse.de>,
        Neelima Krishnan <neelima.krishnan@intel.com>,
        "kvm @ vger . kernel . org" <kvm@vger.kernel.org>
References: <20220411180131.5054-1-jon@nutanix.com>
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 <AE4621FC-0947-4CEF-A1B3-87D4E00C786D@nutanix.com>
From:   Dave Hansen <dave.hansen@intel.com>
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On 4/11/22 12:35, Jon Kohler wrote:
> Also, while I’ve got you, I’d also like to send out a patch to simply
> force abort all transactions even when tsx=on, and just be done with
> TSX. Now that we’ve had the patch that introduced this functionality
> I’m patching for roughly a year, combined with the microcode going
> out, it seems like TSX’s numbered days have come to an end. 

Could you elaborate a little more here?  Why would we ever want to force
abort transactions that don't need to be aborted for some reason?