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I''m working on a new hypercall, do_confer, which allows the directed yielding of a vcpu to another vcpu. It is mainly used when a vcpu fails to acquire a spinlock, yielding to the lock holder instead of spinning. I ported the ppc64 spinlock implementation for the i386 linux portion. In implementing the hypercall, I''ve been trying to figure out how to get the scheduler

I am seeing a problem with Dom0 crashing on x86_64 whenever I create a DomU. I''ve done some more testing, and it appears that this problem is somehow related to networking. Dom0 crashes as soon as the networking services are started when DomU is coming up. As an experiment, I brought up DomU without networking, and it stayed up. As soon as I started DomU with networking enabled, however,

...nd two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy''s changes (Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst@amd.com> - enabling 32 bit guests - splitted patches into two more chunks Description: Ticket locks have an inherent problem in a virtualized case, because the vCPUs are scheduled rather than running concurrently (ignoring gang scheduled vCPUs). This can result in cata...

...nd two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy''s changes (Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst@amd.com> - enabling 32 bit guests - splitted patches into two more chunks Description: Ticket locks have an inherent problem in a virtualized case, because the vCPUs are scheduled rather than running concurrently (ignoring gang scheduled vCPUs). This can result in cata...

...nd two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy''s changes (Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst@amd.com> - enabling 32 bit guests - splitted patches into two more chunks Description: Ticket locks have an inherent problem in a virtualized case, because the vCPUs are scheduled rather than running concurrently (ignoring gang scheduled vCPUs). This can result in cata...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Srivatsa Vaddagiri, Suzuki Poulose, Raghavendra K T (5): Add debugfs support to print u32-arrays in debugfs Add a hypercall to KVM hypervisor to support pv-ticketlocks Added configurati...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Srivatsa Vaddagiri, Suzuki Poulose, Raghavendra K T (5): Add debugfs support to print u32-arrays in debugfs Add a hypercall to KVM hypervisor to support pv-ticketlocks Added configurati...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Documentation/virtual/kvm/cpuid.txt | 4 + Documentation/virtual/kvm/hypercalls.txt | 60 +++++ arch/x86/Kconfig | 10 + arch/x86/include/asm/kvm_host.h...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Documentation/virtual/kvm/cpuid.txt | 4 + Documentation/virtual/kvm/hypercalls.txt | 60 +++++ arch/x86/Kconfig | 10 + arch/x86/include/asm/kvm_host.h...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Description: Ticket locks have an inherent problem in a virtualized case, because the vCPUs are scheduled rather than running concurrently (ignoring gang scheduled vCPUs). This can result in c...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Description: Ticket locks have an inherent problem in a virtualized case, because the vCPUs are scheduled rather than running concurrently (ignoring gang scheduled vCPUs). This can result in c...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Description: Ticket locks have an inherent problem in a virtualized case, because the vCPUs are scheduled rather than running concurrently (ignoring gang scheduled vCPUs). This can result in c...

...one and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Srivatsa Vaddagiri, Suzuki Poulose, Raghavendra K T (4): Add debugfs support to print u32-arrays in debugfs Add a hypercall to KVM hypervisor to support pv-ticketlocks Added configurati...

...one and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Srivatsa Vaddagiri, Suzuki Poulose, Raghavendra K T (4): Add debugfs support to print u32-arrays in debugfs Add a hypercall to KVM hypervisor to support pv-ticketlocks Added configurati...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Results: results for PLE / non PLE machine were posted for V5 patches in https://lkml.org/lkml/2012/3/23/50 https://lkml.org/lkml/2012/4/5/73 Current series is giving similar results but mor...

...and two readuce overhead. - make KVM_DEBUGFS depends on DEBUGFS. - include debugfs header unconditionally. Changes in V2: - rebased patchesto -rc9 - synchronization related changes based on Jeremy's changes (Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com>) pointed by Stephan Diestelhorst <stephan.diestelhorst at amd.com> - enabling 32 bit guests - splitted patches into two more chunks Results: results for PLE / non PLE machine were posted for V5 patches in https://lkml.org/lkml/2012/3/23/50 https://lkml.org/lkml/2012/4/5/73 Current series is giving similar results but mor...

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> Changes since last posting: (Raghavendra K T) [ - Rebased to linux-3.3-rc6. - used function+enum in place of macro (better type checking) - use cmpxchg while resetting zero status for possible race [suggested by Dave Hansen for KVM patches ] ] This series replaces the existing paravirtualized spinlock mechanism with a

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> Changes since last posting: (Raghavendra K T) [ - Rebased to linux-3.3-rc6. - used function+enum in place of macro (better type checking) - use cmpxchg while resetting zero status for possible race [suggested by Dave Hansen for KVM patches ] ] This series replaces the existing paravirtualized spinlock mechanism with a

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> This series replaces the existing paravirtualized spinlock mechanism with a paravirtualized ticketlock mechanism. (targeted for 3.5 window) Changes in V7: - Reabsed patches to 3.4-rc3 - Added jumplabel split patch (originally from Andrew Jones rebased to 3.4-rc3 - jumplabel changes from Ingo and Jason taken and now using

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> This series replaces the existing paravirtualized spinlock mechanism with a paravirtualized ticketlock mechanism. (targeted for 3.5 window) Changes in V7: - Reabsed patches to 3.4-rc3 - Added jumplabel split patch (originally from Andrew Jones rebased to 3.4-rc3 - jumplabel changes from Ingo and Jason taken and now using