Re: [PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-21 Thread Leizhen (ThunderTown)
On 2017/7/19 18:23, Robin Murphy wrote: > On 19/07/17 09:37, Ard Biesheuvel wrote: >> On 18 July 2017 at 17:57, Robin Murphy wrote: >>> Hi all, >>> >>> In the wake of the ARM SMMU optimisation efforts, it seems that certain >>> workloads (e.g. storage I/O with large

Re: [PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-21 Thread Leizhen (ThunderTown)
On 2017/7/19 18:23, Robin Murphy wrote: > On 19/07/17 09:37, Ard Biesheuvel wrote: >> On 18 July 2017 at 17:57, Robin Murphy wrote: >>> Hi all, >>> >>> In the wake of the ARM SMMU optimisation efforts, it seems that certain >>> workloads (e.g. storage I/O with large scatterlists) probably

Re: [PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-19 Thread Robin Murphy
On 19/07/17 09:37, Ard Biesheuvel wrote: > On 18 July 2017 at 17:57, Robin Murphy wrote: >> Hi all, >> >> In the wake of the ARM SMMU optimisation efforts, it seems that certain >> workloads (e.g. storage I/O with large scatterlists) probably remain quite >> heavily

Re: [PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-19 Thread Robin Murphy
On 19/07/17 09:37, Ard Biesheuvel wrote: > On 18 July 2017 at 17:57, Robin Murphy wrote: >> Hi all, >> >> In the wake of the ARM SMMU optimisation efforts, it seems that certain >> workloads (e.g. storage I/O with large scatterlists) probably remain quite >> heavily influenced by IOVA allocation

Re: [PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-19 Thread Ard Biesheuvel
On 18 July 2017 at 17:57, Robin Murphy wrote: > Hi all, > > In the wake of the ARM SMMU optimisation efforts, it seems that certain > workloads (e.g. storage I/O with large scatterlists) probably remain quite > heavily influenced by IOVA allocation performance. Separately,

Re: [PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-19 Thread Ard Biesheuvel
On 18 July 2017 at 17:57, Robin Murphy wrote: > Hi all, > > In the wake of the ARM SMMU optimisation efforts, it seems that certain > workloads (e.g. storage I/O with large scatterlists) probably remain quite > heavily influenced by IOVA allocation performance. Separately, Ard also > reported

[PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-18 Thread Robin Murphy
Hi all, In the wake of the ARM SMMU optimisation efforts, it seems that certain workloads (e.g. storage I/O with large scatterlists) probably remain quite heavily influenced by IOVA allocation performance. Separately, Ard also reported massive performance drops for a graphical desktop on AMD

[PATCH 0/4] Optimise 64-bit IOVA allocations

2017-07-18 Thread Robin Murphy
Hi all, In the wake of the ARM SMMU optimisation efforts, it seems that certain workloads (e.g. storage I/O with large scatterlists) probably remain quite heavily influenced by IOVA allocation performance. Separately, Ard also reported massive performance drops for a graphical desktop on AMD