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

[Stefan Bader]

On 24.05.2017 04:23, Manoj Iyer wrote:
> Any progress on this SRU review? This fix is needed for QDF2400 platforms to
> boot and work as expected with Zesty. The patch set was reviewed by Qualcomm and
> was tested on QDF2400, Thunder-x and on HiSilicon HW for regressions.
> 
> Please let me know if you need any additional information that might be helpful
> in SRU review of these patches. 

See your other iommu submission. You ask for change in generic code (which
affects other architectures than arm64), yet your regression testing only covers
arm64 platforms.

-Stefan
> 
> On Tue, May 9, 2017 at 11:11 AM, Manoj Iyer <manoj.iyer at canonical.com> wrote:
>>
>>
>> On Fri, May 5, 2017 at 9:06 AM, Stefan Bader <stefan.bader at canonical.com> wrote:
>>> 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?). 
>>
>> I have updated the bug after testing the patches on HiSilicon and Cavium
>> systems. Please let me know if you need any thing in addition. 
>>
>>> -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 
>>>
>>> -- kernel-team mailing list kernel-team at lists.ubuntu.com
>>> <mailto:kernel-team at lists.ubuntu.com>
>>> https://lists.ubuntu.com/mailman/listinfo/kernel-team 


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