[Zesty] [SRU] [PATCH 0/6] soft lockup bug fix Qualcomm Centriq 2400 server.

[Stefan Bader]

On 03.05.2017 22:31, Manoj Iyer wrote:
> Booting Ubuntu Zesty (4.10) kernel on Qualcomm Centriq 2400 ARM64 servers
> causes soft lockups on multiple CPUs.

I am not really comfortable with picking a bunch of iommu patches (1+2 now
upstream but the rest still only in linux-next) as a bug fix. Especially when
being told that changes to the generic iommu code would not have any regression
potential outside that one platform you tested (seriously?).

-Stefan

> 
> The following patches were cleanly cherry-picked from linux-next onto
> Zesty 4.10.0-20.22 kernel and tested by me on the QDF2400 SDP at Canonical.
> 
> Please consider the following patches for SRU in Zesty to fix the bug
> http://bugs.launchpad.net/bugs/1680549
> 
> Nate Watterson (1):
>   iommu/iova: Fix underflow bug in __alloc_and_insert_iova_range
> 
> Robin Murphy (5):
>   iommu/dma: Stop getting dma_32bit_pfn wrong
>   iommu/dma: Implement PCI allocation optimisation
>   iommu/dma: Convert to address-based allocation
>   iommu/dma: Clean up MSI IOVA allocation
>   iommu/dma: Plumb in the per-CPU IOVA caches
> 
>  drivers/iommu/dma-iommu.c | 198 ++++++++++++++++++++++++++--------------------
>  drivers/iommu/iova.c      |   2 +-
>  2 files changed, 113 insertions(+), 87 deletions(-)
> 
> --
> 2.11.0
> 
> 


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