Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

According to Takao Indoh's testing, seems adding flush after loading old irte and updating old irte does not fix the dmar faults. According to Takao Indoh's log and your log, the faults happens while and after driver is loaded. Maybe I am using incorrect code in 08/10. On 01/06/2015 02:37

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Zhenhua, I just tested your patchset based on 3.19.0-rc2+, and found several dmar fault and intr-remap fault, it seems not the same as Takao's, please check the attachment. Thanks Baoquan [root@dhcp-16-105 ~]# kdumpctl restart kexec: failed to unloaded kdump kernel Stopping kdump: [FAILED]

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Thank you very much for your help. I have found there are several places need flush, and I will send a new version of this patchset with the flush functions. Regards Zhenhua On 01/06/2015 08:18 AM, Takao Indoh wrote: > On 2014/12/29 12:15, Li, ZhenHua wrote: >> Hi Takao Indoh, >> >> Happy New

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

On 2014/12/29 12:15, Li, ZhenHua wrote: > Hi Takao Indoh, > > Happy New Year, and thank you very much for you help. The flush is quite Happy new year! > a problem, as there are several places the flush function should be called, > I think the flush should be placed in functions like

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

According to Takao Indoh's testing, seems adding flush after loading old irte and updating old irte does not fix the dmar faults. According to Takao Indoh's log and your log, the faults happens while and after driver is loaded. Maybe I am using incorrect code in 08/10. On 01/06/2015 02:37

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Zhenhua, I just tested your patchset based on 3.19.0-rc2+, and found several dmar fault and intr-remap fault, it seems not the same as Takao's, please check the attachment. Thanks Baoquan [root@dhcp-16-105 ~]# kdumpctl restart kexec: failed to unloaded kdump kernel Stopping kdump: [FAILED]

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Thank you very much for your help. I have found there are several places need flush, and I will send a new version of this patchset with the flush functions. Regards Zhenhua On 01/06/2015 08:18 AM, Takao Indoh wrote: On 2014/12/29 12:15, Li, ZhenHua wrote: Hi Takao Indoh, Happy New Year,

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

On 2014/12/29 12:15, Li, ZhenHua wrote: Hi Takao Indoh, Happy New Year, and thank you very much for you help. The flush is quite Happy new year! a problem, as there are several places the flush function should be called, I think the flush should be placed in functions like

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Takao Indoh, Happy New Year, and thank you very much for you help. The flush is quite a problem, as there are several places the flush function should be called, I think the flush should be placed in functions like __iommu_update_old_*. Created a small patch for this, it is attached.

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Takao Indoh, Happy New Year, and thank you very much for you help. The flush is quite a problem, as there are several places the flush function should be called, I think the flush should be placed in functions like __iommu_update_old_*. Created a small patch for this, it is attached.

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

On 2014/12/26 15:46, Li, ZhenHua wrote: > Hi Takao Indoh, > > Thank you very much for your testing. I will add your update in next > version. > Also I think a flush for __iommu_update_old_root_entry is also necessary. > > Currently I have no idea about your fault, does it happen before or >

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Takao Indoh, Thank you very much for your testing. I will add your update in next version. Also I think a flush for __iommu_update_old_root_entry is also necessary. Currently I have no idea about your fault, does it happen before or during its loading? Could you send me your full kernel log

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Zhen-Hua, I tested your patch and found two problems. [1] Kenel panic occurs during 2nd kernel boot. ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 Kernel panic - not syncing: timer doesn't work through Interrupt-remapped IO-APIC CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0 #25

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Zhen-Hua, I tested your patch and found two problems. [1] Kenel panic occurs during 2nd kernel boot. ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 Kernel panic - not syncing: timer doesn't work through Interrupt-remapped IO-APIC CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0 #25

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

Hi Takao Indoh, Thank you very much for your testing. I will add your update in next version. Also I think a flush for __iommu_update_old_root_entry is also necessary. Currently I have no idea about your fault, does it happen before or during its loading? Could you send me your full kernel log

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

On 2014/12/26 15:46, Li, ZhenHua wrote: Hi Takao Indoh, Thank you very much for your testing. I will add your update in next version. Also I think a flush for __iommu_update_old_root_entry is also necessary. Currently I have no idea about your fault, does it happen before or during its

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

This version works for 3.19.0-rc1. Zhenhua On 12/22/2014 05:15 PM, Li, Zhen-Hua wrote: This patchset is an update of Bill Sumner's patchset, implements a fix for: If a kernel boots with intel_iommu=on on a system that supports intel vt-d, when a panic happens, the kdump kernel will boot with

[PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

This patchset is an update of Bill Sumner's patchset, implements a fix for: If a kernel boots with intel_iommu=on on a system that supports intel vt-d, when a panic happens, the kdump kernel will boot with these faults: dmar: DRHD: handling fault status reg 102 dmar: DMAR:[DMA Read]

[PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

This patchset is an update of Bill Sumner's patchset, implements a fix for: If a kernel boots with intel_iommu=on on a system that supports intel vt-d, when a panic happens, the kdump kernel will boot with these faults: dmar: DRHD: handling fault status reg 102 dmar: DMAR:[DMA Read]

Re: [PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

This version works for 3.19.0-rc1. Zhenhua On 12/22/2014 05:15 PM, Li, Zhen-Hua wrote: This patchset is an update of Bill Sumner's patchset, implements a fix for: If a kernel boots with intel_iommu=on on a system that supports intel vt-d, when a panic happens, the kdump kernel will boot with

[PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

This patchset is an update of Bill Sumner's patchset, implements a fix for: If a kernel boots with intel_iommu=on on a system that supports intel vt-d, when a panic happens, the kdump kernel will boot with these faults: dmar: DRHD: handling fault status reg 102 dmar: DMAR:[DMA Read]

[PATCH 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

This patchset is an update of Bill Sumner's patchset, implements a fix for: If a kernel boots with intel_iommu=on on a system that supports intel vt-d, when a panic happens, the kdump kernel will boot with these faults: dmar: DRHD: handling fault status reg 102 dmar: DMAR:[DMA Read]