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From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
To: linux-kernel@vger.kernel.org
Cc: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Subject: [PATCH 0/3] Add a unified parameter "nopvspin"
Date: Sun, 29 Sep 2019 20:21:03 +0800	[thread overview]
Message-ID: <1569759666-26904-1-git-send-email-zhenzhong.duan@oracle.com> (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".
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

             reply	other threads:[~2019-09-30 12:16 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-29 12:21 Zhenzhong Duan [this message]
2019-09-29 12:21 ` [PATCH 1/3] KVM: X86: Add "nopvspin" parameter to disable PV spinlocks Zhenzhong Duan
2019-09-30 15:41   ` Vitaly Kuznetsov
2019-10-01  0:36     ` Zhenzhong Duan
2019-10-01  8:39       ` Vitaly Kuznetsov
2019-10-01  9:47         ` Zhenzhong Duan
2019-10-02 16:47           ` Sean Christopherson
2019-10-03  9:51             ` Zhenzhong Duan
2019-09-29 12:21 ` [PATCH 2/3] xen: Mark "xen_nopvspin" parameter obsolete and map it to "nopvspin" Zhenzhong Duan
2019-09-30 14:25   ` Jürgen Groß
2019-09-29 12:21 ` [PATCH 3/3] x86/hyperv: Mark "hv_nopvspin" " Zhenzhong Duan

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