Message ID | 1570439071-9814-1-git-send-email-zhenzhong.duan@oracle.com (mailing list archive) |
---|---|
Headers | show |
Series | Add a unified parameter "nopvspin" | expand |
The last two patches are reviewed, will any KVM expert be willing to review the first three patches? They are all KVM related changes. Thanks Zhenzhong On 2019/10/7 17:04, Zhenzhong Duan wrote: > 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. > > v5: > PATCH1: new patch to revert a currently unnecessory commit, > code is simpler a bit after that change. [Boris Ostrovsky] > PATCH3: fold 'if' statement,add comments on virt_spin_lock_key, > reorder with PATCH2 to better reflect dependency > PATCH4: fold 'if' statement, add Reviewed-by [Boris Ostrovsky] > PATCH5: add Reviewed-by [Michael Kelley] > > v4: > PATCH1: use variable name nopvspin instead of pvspin and > defined it as __initdata, changed print message, > updated patch description [Sean Christopherson] > PATCH2: remove Suggested-by, use "kvm-guest:" prefix [Sean Christopherson] > PATCH3: make variable nopvsin and xen_pvspin coexist > remove Reviewed-by due to code change [Sean Christopherson] > PATCH4: make variable nopvsin and hv_pvspin coexist [Sean Christopherson] > > v3: > PATCH2: Fix indentation > > v2: > PATCH1: pick the print code change into separate PATCH2, > updated patch description [Vitaly Kuznetsov] > PATCH2: new patch with print code change [Vitaly Kuznetsov] > PATCH3: add Reviewed-by [Juergen Gross] > > Zhenzhong Duan (5): > Revert "KVM: X86: Fix setup the virt_spin_lock_key before static key > get initialized" > x86/kvm: Change print code to use pr_*() format > x86/kvm: Add "nopvspin" parameter to disable PV spinlocks > xen: Mark "xen_nopvspin" parameter obsolete > x86/hyperv: Mark "hv_nopvspin" parameter obsolete > > Documentation/admin-guide/kernel-parameters.txt | 14 +++++- > arch/x86/hyperv/hv_spinlock.c | 4 ++ > arch/x86/include/asm/qspinlock.h | 1 + > arch/x86/kernel/kvm.c | 63 ++++++++++++++----------- > arch/x86/xen/spinlock.c | 4 +- > kernel/locking/qspinlock.c | 7 +++ > 6 files changed, 62 insertions(+), 31 deletions(-) >