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

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Message-Id: <1569759666-26904-1-git-send-email-zhenzhong.duan@oracle.com>
Date:   Sun, 29 Sep 2019 20:21:03 +0800
From:   Zhenzhong Duan <zhenzhong.duan@...cle.com>
To:     linux-kernel@...r.kernel.org
Cc:     Zhenzhong Duan <zhenzhong.duan@...cle.com>
Subject: [PATCH 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".
I also changed print code in first patch, I'm not sure if I should
pick that part into a separate patch, just let me know if it's
preferred.

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

Thanks
Zhenzhong