linux-kernel - [PATCH v2 0/3] Add a unified parameter "nopvspin"

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Message-Id: <1569845340-11884-1-git-send-email-zhenzhong.duan@oracle.com>
Date:   Mon, 30 Sep 2019 20:08:56 +0800
From:   Zhenzhong Duan <zhenzhong.duan@...cle.com>
To:     linux-kernel@...r.kernel.org
Cc:     vkuznets@...hat.com, linux-hyperv@...r.kernel.org,
        kvm@...r.kernel.org, Zhenzhong Duan <zhenzhong.duan@...cle.com>
Subject: [PATCH v2 0/3] Add a unified parameter "nopvspin"

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.

v2:
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]

Thanks
Zhenzhong