On Fri, 2022-03-04 at 14:03 +, Robin Murphy wrote:
>
> OK, so either there's a mystery bug where IOVAs somehow get freed on
> offline CPUs, or the hotplug notifier isn't working correctly, or
> you've
> contrived a situation where alloc_iova_fast() is actually racing
> against
> iova_cpuhp_
On Fri, 2022-03-04 at 14:03 +, Robin Murphy wrote:
>
> OK, so either there's a mystery bug where IOVAs somehow get freed on
> offline CPUs, or the hotplug notifier isn't working correctly, or
> you've
> contrived a situation where alloc_iova_fast() is actually racing
> against
> iova_cpuhp_
On 2022-03-04 9:22, John Garry wrote:
> On 04/03/2022 04:46, yf.wang--- via iommu wrote:
> > * MEDIATEK Confidentiality Notice
> > The
> > information contained in this e-mail message (including any
> > attachments) may be confidential, proprietary, privileged, or
On 2022-03-04 04:46, yf.wang--- via iommu wrote:
From: Yunfei Wang
In alloc_iova_fast function, if an iova alloc request fail,
it will free the iova ranges present in the percpu iova
rcaches and free global iova rcache and then retry, but
flushing CPU iova rcaches only for each online CPU, whic
On 04/03/2022 04:46, yf.wang--- via iommu wrote:
* MEDIATEK Confidentiality Notice
The information contained in this e-mail message (including any
attachments) may be confidential, proprietary, privileged, or otherwise
exempt from disclosure under applicable laws.
On Fri, 2022-03-04 at 12:46 +0800, yf.w...@mediatek.com wrote:
> From: Yunfei Wang
>
> In alloc_iova_fast function, if an iova alloc request fail,
> it will free the iova ranges present in the percpu iova
> rcaches and free global iova rcache and then retry, but
> flushing CPU iova rcaches only f
From: Yunfei Wang
In alloc_iova_fast function, if an iova alloc request fail,
it will free the iova ranges present in the percpu iova
rcaches and free global iova rcache and then retry, but
flushing CPU iova rcaches only for each online CPU, which
will cause incomplete rcache cleaning, and iova r
