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

[David Marchand]

On Thu, Mar 26, 2020 at 6:07 PM Burakov, Anatoly
<anatoly.burakov at intel.com> wrote:
>
> 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 :)

Fair enough, I will take it today.
Thanks.


--
David Marchand