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From: Zhenzhong Duan <>
Cc:,,, Zhenzhong Duan <>
Subject: [PATCH v2 0/3] Add a unified parameter "nopvspin"
Date: Mon, 30 Sep 2019 20:08:56 +0800
Message-ID: <> (raw)

There are cases folks want to disable spinlock optimization for
debug/test purpose. Xen and hyperv already have parameters "xen_nopvspin"
and "hv_nopvspin" to support that, but kvm doesn't.

The first patch adds that feature to KVM guest with "nopvspin".

For compatibility reason original parameters "xen_nopvspin" and
"hv_nopvspin" are retained and marked obsolete.

PATCH1: pick the print code change into seperate PATCH2,
        updated patch description             [Vitaly Kuznetsov]
PATCH2: new patch with print code change      [Vitaly Kuznetsov]
PATCH3: add Reviewed-by                       [Juergen Gross]


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Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-30 12:08 Zhenzhong Duan [this message]
2019-09-30 12:08 ` [PATCH v2 1/4] x86/kvm: Add "nopvspin" parameter to disable PV spinlocks Zhenzhong Duan
2019-09-30 12:08 ` [PATCH v2 2/4] x86/kvm: Change print code to use pr_*() format Zhenzhong Duan
2019-09-30 12:08 ` [PATCH v2 3/4] xen: Mark "xen_nopvspin" parameter obsolete and map it to "nopvspin" Zhenzhong Duan
2019-09-30 12:09 ` [PATCH v2 4/4] x86/hyperv: Mark "hv_nopvspin" " Zhenzhong Duan
2019-10-01 12:19 ` [PATCH v2 0/3] Add a unified parameter "nopvspin" Zhenzhong Duan

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