# HG changeset patch # User yamahata@xxxxxxxxxxxxx # Date 1188291500 -32400 # Node ID 8e146ea8c43c4e731dced5b98dc269023d70b5e5 # Parent 58d131f1fb35977ff2d8682f553391c8a866d52c Make XEN_DOMCTL_destroydomain hypercall continuable. XEN_DOMCTL_destroydomain hypercall frees domain resources, especially it frees all pages of the domain. When domain memory is very large, it takes too long resulting in soft lockup warning message. To prevent softlokup, make the hypercall continuable. PATCHNAME: make_xen_domctl_destroydomain_hypercall_continuable Signed-off-by: Isaku Yamahata Signed-off-by: Keir Fraser diff -r 58d131f1fb35 -r 8e146ea8c43c tools/libxc/xc_domain.c --- a/tools/libxc/xc_domain.c Fri Aug 24 16:32:56 2007 +0100 +++ b/tools/libxc/xc_domain.c Tue Aug 28 17:58:20 2007 +0900 @@ -55,10 +55,14 @@ int xc_domain_destroy(int xc_handle, int xc_domain_destroy(int xc_handle, uint32_t domid) { + int ret; DECLARE_DOMCTL; domctl.cmd = XEN_DOMCTL_destroydomain; domctl.domain = (domid_t)domid; - return do_domctl(xc_handle, &domctl); + do { + ret = do_domctl(xc_handle, &domctl); + } while ( ret && errno == EAGAIN ); + return ret; } int xc_domain_shutdown(int xc_handle, diff -r 58d131f1fb35 -r 8e146ea8c43c xen/arch/ia64/xen/domain.c --- a/xen/arch/ia64/xen/domain.c Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/arch/ia64/xen/domain.c Tue Aug 28 17:58:20 2007 +0900 @@ -936,7 +936,7 @@ static void relinquish_memory(struct dom spin_unlock_recursive(&d->page_alloc_lock); } -void domain_relinquish_resources(struct domain *d) +int domain_relinquish_resources(struct domain *d) { /* Relinquish guest resources for VT-i domain. */ if (d->vcpu[0] && VMX_DOMAIN(d->vcpu[0])) @@ -954,6 +954,8 @@ void domain_relinquish_resources(struct /* Free page used by xen oprofile buffer */ free_xenoprof_pages(d); + + return 0; } unsigned long diff -r 58d131f1fb35 -r 8e146ea8c43c xen/arch/powerpc/domain.c --- a/xen/arch/powerpc/domain.c Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/arch/powerpc/domain.c Tue Aug 28 17:58:20 2007 +0900 @@ -313,13 +313,13 @@ static void relinquish_memory(struct dom spin_unlock_recursive(&d->page_alloc_lock); } -void domain_relinquish_resources(struct domain *d) +int domain_relinquish_resources(struct domain *d) { relinquish_memory(d, &d->xenpage_list); relinquish_memory(d, &d->page_list); xfree(d->arch.foreign_mfns); xfree(d->arch.p2m); - return; + return 0; } void arch_dump_domain_info(struct domain *d) diff -r 58d131f1fb35 -r 8e146ea8c43c xen/arch/x86/domain.c --- a/xen/arch/x86/domain.c Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/arch/x86/domain.c Tue Aug 28 17:58:20 2007 +0900 @@ -1717,7 +1717,7 @@ static void vcpu_destroy_pagetables(stru v->arch.cr3 = 0; } -void domain_relinquish_resources(struct domain *d) +int domain_relinquish_resources(struct domain *d) { struct vcpu *v; @@ -1754,6 +1754,8 @@ void domain_relinquish_resources(struct if ( is_hvm_domain(d) ) hvm_domain_relinquish_resources(d); + + return 0; } void arch_dump_domain_info(struct domain *d) diff -r 58d131f1fb35 -r 8e146ea8c43c xen/common/domain.c --- a/xen/common/domain.c Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/common/domain.c Tue Aug 28 17:58:20 2007 +0900 @@ -298,26 +298,37 @@ struct domain *rcu_lock_domain_by_id(dom } -void domain_kill(struct domain *d) -{ - domain_pause(d); - - /* Already dying? Then bail. */ - if ( test_and_set_bool(d->is_dying) ) - { - domain_unpause(d); - return; - } - - evtchn_destroy(d); - gnttab_release_mappings(d); - domain_relinquish_resources(d); - put_domain(d); - - /* Kick page scrubbing after domain_relinquish_resources(). */ - page_scrub_kick(); - - send_guest_global_virq(dom0, VIRQ_DOM_EXC); +int domain_kill(struct domain *d) +{ + int rc = 0; + + if ( d == current->domain ) + return -EINVAL; + + /* Protected by domctl_lock. */ + switch ( d->is_dying ) + { + case DOMDYING_alive: + domain_pause(d); + d->is_dying = DOMDYING_dying; + evtchn_destroy(d); + gnttab_release_mappings(d); + case DOMDYING_dying: + rc = domain_relinquish_resources(d); + page_scrub_kick(); + if ( rc != 0 ) + { + BUG_ON(rc != -EAGAIN); + break; + } + d->is_dying = DOMDYING_dead; + put_domain(d); + send_guest_global_virq(dom0, VIRQ_DOM_EXC); + case DOMDYING_dead: + break; + } + + return rc; } diff -r 58d131f1fb35 -r 8e146ea8c43c xen/common/domctl.c --- a/xen/common/domctl.c Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/common/domctl.c Tue Aug 28 17:58:20 2007 +0900 @@ -114,10 +114,10 @@ void getdomaininfo(struct domain *d, str info->cpu_time = cpu_time; info->flags = flags | - (d->is_dying ? XEN_DOMINF_dying : 0) | - (d->is_shut_down ? XEN_DOMINF_shutdown : 0) | - (d->is_paused_by_controller ? XEN_DOMINF_paused : 0) | - (d->debugger_attached ? XEN_DOMINF_debugged : 0) | + ((d->is_dying == DOMDYING_dead) ? XEN_DOMINF_dying : 0) | + (d->is_shut_down ? XEN_DOMINF_shutdown : 0) | + (d->is_paused_by_controller ? XEN_DOMINF_paused : 0) | + (d->debugger_attached ? XEN_DOMINF_debugged : 0) | d->shutdown_code << XEN_DOMINF_shutdownshift; if ( is_hvm_domain(d) ) @@ -395,12 +395,7 @@ long do_domctl(XEN_GUEST_HANDLE(xen_domc ret = -ESRCH; if ( d != NULL ) { - ret = -EINVAL; - if ( d != current->domain ) - { - domain_kill(d); - ret = 0; - } + ret = domain_kill(d); rcu_unlock_domain(d); } } diff -r 58d131f1fb35 -r 8e146ea8c43c xen/include/asm-ia64/domain.h --- a/xen/include/asm-ia64/domain.h Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/include/asm-ia64/domain.h Tue Aug 28 17:58:20 2007 +0900 @@ -18,7 +18,6 @@ struct tlb_track; struct tlb_track; #endif -extern void domain_relinquish_resources(struct domain *); struct vcpu; extern void relinquish_vcpu_resources(struct vcpu *v); extern void vcpu_share_privregs_with_guest(struct vcpu *v); diff -r 58d131f1fb35 -r 8e146ea8c43c xen/include/xen/domain.h --- a/xen/include/xen/domain.h Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/include/xen/domain.h Tue Aug 28 17:58:20 2007 +0900 @@ -45,7 +45,7 @@ int arch_set_info_guest(struct vcpu *, v int arch_set_info_guest(struct vcpu *, vcpu_guest_context_u); void arch_get_info_guest(struct vcpu *, vcpu_guest_context_u); -void domain_relinquish_resources(struct domain *d); +int domain_relinquish_resources(struct domain *d); void dump_pageframe_info(struct domain *d); diff -r 58d131f1fb35 -r 8e146ea8c43c xen/include/xen/sched.h --- a/xen/include/xen/sched.h Fri Aug 24 16:32:56 2007 +0100 +++ b/xen/include/xen/sched.h Tue Aug 28 17:58:20 2007 +0900 @@ -191,7 +191,7 @@ struct domain /* Are any VCPUs polling event channels (SCHEDOP_poll)? */ bool_t is_polling; /* Is this guest dying (i.e., a zombie)? */ - bool_t is_dying; + enum { DOMDYING_alive, DOMDYING_dying, DOMDYING_dead } is_dying; /* Domain is paused by controller software? */ bool_t is_paused_by_controller; @@ -335,7 +335,7 @@ static inline struct domain *rcu_lock_cu struct domain *get_domain_by_id(domid_t dom); void domain_destroy(struct domain *d); -void domain_kill(struct domain *d); +int domain_kill(struct domain *d); void domain_shutdown(struct domain *d, u8 reason); void domain_resume(struct domain *d); void domain_pause_for_debugger(void);