[dpdk-dev] [dpdk-stable] [PATCH v3] eal/mem: preallocate VA space in no-huge mode

[Burakov, Anatoly]

On 25-Mar-20 2:39 PM, David Marchand wrote:
> On Fri, Feb 7, 2020 at 12:11 PM Anatoly Burakov
> <anatoly.burakov at intel.com> wrote:
>>
>> When --no-huge mode is used, the memory is currently allocated with
>> mmap(NULL, ...). This is fine in most cases, but can fail in cases
>> where DPDK is run on a machine with an IOMMU that is of more limited
>> address width than that of a VA, because we're not specifying the
>> address hint for mmap() call.
>>
>> Fix it by preallocating VA space before mapping it.
>>
>> Cc: stable at dpdk.org
>>
>> Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
> 
> Reproduced issue reported by Thomas on v2.
> Works fine with v3.
> 
> Tested-by: David Marchand <david.marchand at redhat.com>
> 
> 
> Does this issue affect FreeBSD too?
> 

I don't think we have support for IOMMU on FreeBSD so my guess is no :)

-- 
Thanks,
Anatoly