search for: vcpu_pause

...ing interface, since the new flag also serves as a sync point. Signed-off-by Kevin Tian <kevin.tian@intel.com> diff -r d5315422dbc8 xen/common/domain.c --- a/xen/common/domain.c Mon May 14 18:35:31 2007 -0400 +++ b/xen/common/domain.c Mon May 14 20:21:04 2007 -0400 @@ -530,6 +530,17 @@ void vcpu_pause_nosync(struct vcpu *v) vcpu_sleep_nosync(v); } +/* _VPF_need_sync serves not only as flag for sync pause, but also + * as hint for other cpu waiting for this pause. + */ +void vcpu_pause_self(void) +{ + struct vcpu *v = current; + + set_bit(_VPF_need_sync, &v->pause_flags); +...

================== STATUS ================== I do the heavy load test of create/destroy. CREDIT scheduler(cshed_schedule) checks BUG_ON(!vcpu_running) at the end of code. It makes error. The reason is that atomic_inc(&v->pausecnt)@vcpu_pause() is called without lock. (spin_lock(&schedule_data[cpu].schedule_lock)) This lock-less "pausecnt" makes vcpu_running state changing during the lock of spin_lock_irq(&schedule_data[cpu].schedule_lock)@__enter_schduler(). The code of cshed_schedule exists within this lock. ===...

Allow one vcpu to pause self, with full context sync-ed. Signed-off-by Kevin Tian <kevin.tian@intel.com> diff -r f6443af464be xen/common/domain.c --- a/xen/common/domain.c Tue Feb 13 13:37:12 2007 +0800 +++ b/xen/common/domain.c Tue Feb 13 13:41:44 2007 +0800 @@ -375,6 +375,18 @@ void vcpu_pause_nosync(struct vcpu *v) vcpu_sleep_nosync(v); } +/* This is not a code path called from guest, since execution is paused + * after next context switch. ACPI PM requires this to pause vcpu0 of + * dom0 itself, in case that vcpu not running on cpu 0. + */ +void vcpu_pause_self(void) +{ + st...

I''ve put together two patches. The first introduces a new dom0_op, set_max_vcpus, which with an associated variable and a check in the VCPUOP handler fixes [1]bug 288. Also included is a new VCPUOP, VCPUOP_create, which handles all of the vcpu creation tasks and leaves initialization and unpausing to VCPUOP_initialize. The separation allows for build-time allocation of vcpus which

These two patches were originally part of the XSM series that I have posted, and remain prerequisites for that series. However, they are independent of the XSM changes and are a useful simplification regardless of the use of XSM. The Acked-bys on these patches were provided before rebasing them over the copyback changes in 26268:1b72138bddda, which had minor conflicts that I resolved. [PATCH

The patch ''mem_event: use wait queue when ring is full'' I just sent out makes use of the waitqueue feature. There are two issues I get with the change applied: I think I got the logic right, and in my testing vcpu->pause_count drops to zero in p2m_mem_paging_resume(). But for some reason the vcpu does not make progress after the first wakeup. In my debugging there is one

...00000000000e02b^M (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000^M (XEN) 0000000000000000 ffff8300bdfa7000 0000000000000000 0000000000000000^M (XEN) Xen call trace:^M (XEN) [<ffff82c4c0125461>] vcpu_sleep_sync+0x53/0x82^M (XEN) [<ffff82c4c0104703>] vcpu_pause+0x35/0x37^M (XEN) [<ffff82c4c01ce55f>] vmx_vmcs_enter+0x89/0xba^M (XEN) [<ffff82c4c01ce5de>] vmcs_dump_vcpu+0x4e/0x756^M (XEN) [<ffff82c4c01ced80>] vmcs_dump+0x9a/0xe2^M (XEN) [<ffff82c4c011054c>] handle_keypress+0x70/0x9c^M (XEN) [<ffff82c4c011058d>] ke...