search for: paravirt_lazy_mode

...7 files changed, 137 insertions(+), 104 deletions(-) =================================================================== --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -265,6 +265,69 @@ int paravirt_disable_iospace(void) } return ret; +} + +static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; + +static void enter_lazy(enum paravirt_lazy_mode mode, struct pv_lazy_ops *ops) +{ + BUG_ON(x86_read_percpu(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); + BUG_ON(preemptible()); + + x86_write_percpu(paravirt_lazy_mode, mode); + (*ops->enter)(); +} + +st...

...7 files changed, 137 insertions(+), 104 deletions(-) =================================================================== --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -265,6 +265,69 @@ int paravirt_disable_iospace(void) } return ret; +} + +static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; + +static void enter_lazy(enum paravirt_lazy_mode mode, struct pv_lazy_ops *ops) +{ + BUG_ON(x86_read_percpu(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); + BUG_ON(preemptible()); + + x86_write_percpu(paravirt_lazy_mode, mode); + (*ops->enter)(); +} + +st...

...7 files changed, 128 insertions(+), 82 deletions(-) =================================================================== --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -265,6 +265,49 @@ int paravirt_disable_iospace(void) } return ret; +} + +static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; + +static inline void enter_lazy(enum paravirt_lazy_mode mode) +{ + BUG_ON(x86_read_percpu(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); + BUG_ON(preemptible()); + + x86_write_percpu(paravirt_lazy_mode, mode); +} + +void paravirt_leave_lazy(enum paravirt_laz...

...7 files changed, 128 insertions(+), 82 deletions(-) =================================================================== --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -265,6 +265,49 @@ int paravirt_disable_iospace(void) } return ret; +} + +static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; + +static inline void enter_lazy(enum paravirt_lazy_mode mode) +{ + BUG_ON(x86_read_percpu(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); + BUG_ON(preemptible()); + + x86_write_percpu(paravirt_lazy_mode, mode); +} + +void paravirt_leave_lazy(enum paravirt_laz...

...erride: about 6% using the gntdev device. Each m2p_add/remove_override call issues a MULTI_grant_table_op and a __flush_tlb_single if kmap_op != NULL. Batching all the calls together is a great performance benefit because it means issuing one hypercall total rather than two hypercall per page. If paravirt_lazy_mode is set PARAVIRT_LAZY_MMU, all these calls are going to be batched together, otherwise they are issued one at a time. Adding arch_enter_lazy_mmu_mode/arch_leave_lazy_mmu_mode around the m2p_add/remove_override calls forces paravirt_lazy_mode to PARAVIRT_LAZY_MMU, therefore makes sure that they are...

Hi folks, With this series, the bulk of the work of pvops64 is done. Here, I integrate most of the paravirt.c and paravirt.h files, making them applicable to both architectures. CONFIG_PARAVIRT is _not_ present yet. Basically, this code is missing page table integration (patches currently being worked on by Jeremy). Enjoy

Hi folks, With this series, the bulk of the work of pvops64 is done. Here, I integrate most of the paravirt.c and paravirt.h files, making them applicable to both architectures. CONFIG_PARAVIRT is _not_ present yet. Basically, this code is missing page table integration (patches currently being worked on by Jeremy). Enjoy

Andrew Morton commented out some stuff to make lguest compile. This should actually make it work (in the latest -mm). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/lguest.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) =================================================================== --- a/drivers/lguest/lguest.c +++

Andrew Morton commented out some stuff to make lguest compile. This should actually make it work (in the latest -mm). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/lguest.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) =================================================================== --- a/drivers/lguest/lguest.c +++

.... This is a fairly - * brute-force approach to disabling all non-virtual drivers. - * - * Note that this must be called very early to have any effect. - */ -int paravirt_disable_iospace(void) -{ - return request_resource(&ioport_resource, &reserve_ioports); -} - static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; static inline void enter_lazy(enum paravirt_lazy_mode mode) -- 2.12.0

...for two PTE updates: 2269 (2261 - 2272) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> diff -r 077496256739 drivers/lguest/lguest.c --- a/drivers/lguest/lguest.c Thu May 31 16:34:17 2007 +1000 +++ b/drivers/lguest/lguest.c Thu May 31 16:36:23 2007 +1000 @@ -58,9 +58,10 @@ static enum paravirt_lazy_mode lazy_mode static enum paravirt_lazy_mode lazy_mode; static void lguest_lazy_mode(enum paravirt_lazy_mode mode) { - if (mode == PARAVIRT_LAZY_FLUSH) - hcall(LHCALL_FLUSH_ASYNC, 0, 0, 0); - else { + if (mode == PARAVIRT_LAZY_FLUSH) { + if (unlikely(lazy_mode != PARAVIRT_LAZY_NONE)) + hcall(LHC...

...for two PTE updates: 2269 (2261 - 2272) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> diff -r 077496256739 drivers/lguest/lguest.c --- a/drivers/lguest/lguest.c Thu May 31 16:34:17 2007 +1000 +++ b/drivers/lguest/lguest.c Thu May 31 16:36:23 2007 +1000 @@ -58,9 +58,10 @@ static enum paravirt_lazy_mode lazy_mode static enum paravirt_lazy_mode lazy_mode; static void lguest_lazy_mode(enum paravirt_lazy_mode mode) { - if (mode == PARAVIRT_LAZY_FLUSH) - hcall(LHCALL_FLUSH_ASYNC, 0, 0, 0); - else { + if (mode == PARAVIRT_LAZY_FLUSH) { + if (unlikely(lazy_mode != PARAVIRT_LAZY_NONE)) + hcall(LHC...

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

...007 -0700 @@ -69,6 +69,7 @@ static struct { void (*flush_tlb)(int); void (*set_initial_ap_state)(int, int); void (*halt)(void); + void (*set_lazy_mode)(int mode); } vmi_ops; /* @@ -545,6 +546,26 @@ vmi_startup_ipi_hook(int phys_apicid, un } #endif +static void vmi_set_lazy_mode(enum paravirt_lazy_mode mode) +{ + static DEFINE_PER_CPU(int, lazy_mode); + + if (!vmi_ops.set_lazy_mode) + return; + + /* Modes should never nest or overlap */ + BUG_ON(__get_cpu_var(lazy_mode) && !(mode == PARAVIRT_LAZY_NONE || + mode == PARAVIRT_LAZY_FLUSH)); + + if (mode == PARAVIRT_LAZY_FLUSH) { +...

...007 -0700 @@ -69,6 +69,7 @@ static struct { void (*flush_tlb)(int); void (*set_initial_ap_state)(int, int); void (*halt)(void); + void (*set_lazy_mode)(int mode); } vmi_ops; /* @@ -545,6 +546,26 @@ vmi_startup_ipi_hook(int phys_apicid, un } #endif +static void vmi_set_lazy_mode(enum paravirt_lazy_mode mode) +{ + static DEFINE_PER_CPU(int, lazy_mode); + + if (!vmi_ops.set_lazy_mode) + return; + + /* Modes should never nest or overlap */ + BUG_ON(__get_cpu_var(lazy_mode) && !(mode == PARAVIRT_LAZY_NONE || + mode == PARAVIRT_LAZY_FLUSH)); + + if (mode == PARAVIRT_LAZY_FLUSH) { +...

...55 +++++++++++++++++++++++++++++++--------------- arch/i386/xen/mmu.c | 29 +++++++++++++++++++++--- arch/i386/xen/xen-ops.h | 1 3 files changed, 65 insertions(+), 20 deletions(-) --- a/arch/i386/xen/enlighten.c +++ b/arch/i386/xen/enlighten.c @@ -56,7 +56,23 @@ DEFINE_PER_CPU(enum paravirt_lazy_mode, DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info); -DEFINE_PER_CPU(unsigned long, xen_cr3); + +/* + * Note about cr3 (pagetable base) values: + * + * xen_cr3 contains the current logical cr3 value; it contains the + * last set cr3. This may not be...