Re: [PATCH v5 15/23] iommu: handle page response timeout

2018-05-14 Thread Lu Baolu
Hi, On 05/12/2018 04:54 AM, Jacob Pan wrote: > When IO page faults are reported outside IOMMU subsystem, the page > request handler may fail for various reasons. E.g. a guest received > page requests but did not have a chance to run for a long time. The > irresponsive behavior could hold off limit

[PATCH v5 15/23] iommu: handle page response timeout

2018-05-11 Thread Jacob Pan
When IO page faults are reported outside IOMMU subsystem, the page request handler may fail for various reasons. E.g. a guest received page requests but did not have a chance to run for a long time. The irresponsive behavior could hold off limited resources on the pending device. There can be hardw