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kvm : Fold pv_unhalt flag into GET_MP_STATE ioctl to aid migration From: Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> During migration, any vcpu that got kicked but did not become runnable (still in halted state) should be runnable after migration. Signed-off-by: Raghavendra K T <raghavendra.kt at...

On Tue, Aug 6, 2013 at 11:23 AM, Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> wrote: > kvm : Fold pv_unhalt flag into GET_MP_STATE ioctl to aid migration > > From: Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> > > During migration, any vcpu that got kicked but did not become runnable > (still in halted state) should be runnable after migration. If this is about migration co...

On Tue, Aug 6, 2013 at 11:23 AM, Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> wrote: > kvm : Fold pv_unhalt flag into GET_MP_STATE ioctl to aid migration > > From: Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> > > During migration, any vcpu that got kicked but did not become runnable > (still in halted state) should be runnable after migration. If this is about migration co...

This series forms the kvm host part of paravirtual spinlock based against kvm tree. Please refer https://lkml.org/lkml/2013/8/6/178 for kvm guest part of the series. Please note that: kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi is a common patch for both guest and host. Srivatsa Vaddagiri (1): kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks Raghavendra K T (4): kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi kvm : Fold pv_unhalt flag into GET_MP_STATE ioct...

This series forms the kvm host part of paravirtual spinlock based against kvm tree. Please refer https://lkml.org/lkml/2013/8/6/178 for kvm guest part of the series. Please note that: kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi is a common patch for both guest and host. Srivatsa Vaddagiri (1): kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks Raghavendra K T (4): kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi kvm : Fold pv_unhalt flag into GET_MP_STATE ioct...

This series forms the kvm host part of paravirtual spinlock based against kvm tree. Please refer to https://lkml.org/lkml/2013/8/9/265 for kvm guest and Xen, x86 part merged to -tip spinlocks. Please note that: kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi is a common patch for both guest and host. Changes since V12: fold the patch 3 into patch 2 for bisection. (Eric Northup) Raghavendra K T (3): kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi kvm hypervisor: Simplify kvm_for_each_vcpu with kvm_irq_delivery_to...

This series forms the kvm host part of paravirtual spinlock based against kvm tree. Please refer to https://lkml.org/lkml/2013/8/9/265 for kvm guest and Xen, x86 part merged to -tip spinlocks. Please note that: kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi is a common patch for both guest and host. Changes since V12: fold the patch 3 into patch 2 for bisection. (Eric Northup) Raghavendra K T (3): kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi kvm hypervisor: Simplify kvm_for_each_vcpu with kvm_irq_delivery_to...

On 08/07/2013 12:02 AM, Eric Northup wrote: > > If this is about migration correctness, could it get folded into the > previous patch 2/5, so that there's not a broken commit which could > hurt bisection? Yes. It could be. Only reason I maintained like that was, original author in the previous patch is different (Srivatsa) and I did not want to merge this hunk when the patch

..., based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. one MSR is added to aid live migration. Changes in V5: - rebased to 3.3-rc6 - added PV_UNHALT_MSR that would help in live migration (Avi) - removed PV_LOCK_KICK vcpu request and pv_unhalt flag (re)added. - Changed hypercall documentaion (Alex). - mode_t changed to umode_t in debugfs. - MSR related documentation added. - rename PV_LOCK_KICK to PV_UNHALT. - host and guest patches not mixed....

..., based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. one MSR is added to aid live migration. Changes in V5: - rebased to 3.3-rc6 - added PV_UNHALT_MSR that would help in live migration (Avi) - removed PV_LOCK_KICK vcpu request and pv_unhalt flag (re)added. - Changed hypercall documentaion (Alex). - mode_t changed to umode_t in debugfs. - MSR related documentation added. - rename PV_LOCK_KICK to PV_UNHALT. - host and guest patches not mixed....

...te: 1) patch is based on 3.4-rc3 + ticketlock patches in https://lkml.org/lkml/2012/4/19/335 [ The patches are targeted for 3.5 window ] Changes in V6: - Rebased to 3.4-rc3 - Removed debugfs changes patch which should now be in Xen/linux-next. (https://lkml.org/lkml/2012/3/30/687) - Removed PV_UNHALT_MSR since currently we don't need guest communication, and made pv_unhalt folded to GET_MP_STATE (Marcello, Avi[long back]) - Take jumplabel changes from Ingo/Jason into use (static_key_slow_inc usage) - Added inline to spinlock_init in non PARAVIRT case - Move arch specific code to arch/x86...

...te: 1) patch is based on 3.4-rc3 + ticketlock patches in https://lkml.org/lkml/2012/4/19/335 [ The patches are targeted for 3.5 window ] Changes in V6: - Rebased to 3.4-rc3 - Removed debugfs changes patch which should now be in Xen/linux-next. (https://lkml.org/lkml/2012/3/30/687) - Removed PV_UNHALT_MSR since currently we don't need guest communication, and made pv_unhalt folded to GET_MP_STATE (Marcello, Avi[long back]) - Take jumplabel changes from Ingo/Jason into use (static_key_slow_inc usage) - Added inline to spinlock_init in non PARAVIRT case - Move arch specific code to arch/x86...

...hecking) - use cmpxchg while resetting zero status for possible race [suggested by Dave Hansen for KVM patches ] KVM patch Change history: Changes in V6: - Rebased to 3.4-rc3 - Removed debugfs changes patch which should now be in Xen/linux-next. (https://lkml.org/lkml/2012/3/30/687) - Removed PV_UNHALT_MSR since currently we don''t need guest communication, and made pv_unhalt folded to GET_MP_STATE (Marcello, Avi[long back]) - Take jumplabel changes from Ingo/Jason into use (static_key_slow_inc usage) - Added inline to spinlock_init in non PARAVIRT case - Move arch specific code to arch...

...hecking) - use cmpxchg while resetting zero status for possible race [suggested by Dave Hansen for KVM patches ] KVM patch Change history: Changes in V6: - Rebased to 3.4-rc3 - Removed debugfs changes patch which should now be in Xen/linux-next. (https://lkml.org/lkml/2012/3/30/687) - Removed PV_UNHALT_MSR since currently we don''t need guest communication, and made pv_unhalt folded to GET_MP_STATE (Marcello, Avi[long back]) - Take jumplabel changes from Ingo/Jason into use (static_key_slow_inc usage) - Added inline to spinlock_init in non PARAVIRT case - Move arch specific code to arch...

...hecking) - use cmpxchg while resetting zero status for possible race [suggested by Dave Hansen for KVM patches ] KVM patch Change history: Changes in V6: - Rebased to 3.4-rc3 - Removed debugfs changes patch which should now be in Xen/linux-next. (https://lkml.org/lkml/2012/3/30/687) - Removed PV_UNHALT_MSR since currently we don''t need guest communication, and made pv_unhalt folded to GET_MP_STATE (Marcello, Avi[long back]) - Take jumplabel changes from Ingo/Jason into use (static_key_slow_inc usage) - Added inline to spinlock_init in non PARAVIRT case - Move arch specific code to arch...

...wrote: > > This series forms the kvm host part of paravirtual spinlock > based against kvm tree. > > Please refer to https://lkml.org/lkml/2013/8/9/265 for > kvm guest and Xen, x86 part merged to -tip spinlocks. > > Please note that: > kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi is a common patch > for both guest and host. > Thanks, applied. The patchset is not against kvm.git queue though, so I had to fix one minor conflict manually. > Changes since V12: > fold the patch 3 into patch 2 for bisection. (Eric Northup) > > Raghavend...

...plementation for both Xen and KVM.(targeted for 3.5 window) Note: This needs debugfs changes patch that should be in Xen / linux-next https://lkml.org/lkml/2012/3/30/687 Changes in V8: - Reabsed patches to 3.4-rc4 - Combined the KVM changes with ticketlock + Xen changes (Ingo) - Removed CAP_PV_UNHALT since it is redundant (Avi). But note that we need newer qemu which uses KVM_GET_SUPPORTED_CPUID ioctl. - Rewrite GET_MP_STATE condition (Avi) - Make pv_unhalt = bool (Avi) - Move out reset pv_unhalt code to vcpu_run from vcpu_block (Gleb) - Documentation changes (Rob Landley) - Have a pri...

...plementation for both Xen and KVM.(targeted for 3.5 window) Note: This needs debugfs changes patch that should be in Xen / linux-next https://lkml.org/lkml/2012/3/30/687 Changes in V8: - Reabsed patches to 3.4-rc4 - Combined the KVM changes with ticketlock + Xen changes (Ingo) - Removed CAP_PV_UNHALT since it is redundant (Avi). But note that we need newer qemu which uses KVM_GET_SUPPORTED_CPUID ioctl. - Rewrite GET_MP_STATE condition (Avi) - Make pv_unhalt = bool (Avi) - Move out reset pv_unhalt code to vcpu_run from vcpu_block (Gleb) - Documentation changes (Rob Landley) - Have a pri...

The 5-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. Changes in V4: - reabsed to 3.2.0 pre. - use APIC

The 5-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another vcpu out of halt state. The blocking of vcpu is done using halt() in (lock_spinning) slowpath. Changes in V4: - reabsed to 3.2.0 pre. - use APIC