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List:       dpdk-users
Subject:    Re: [dpdk-users] WARNING! Base virtual address hint not respected!
From:       Cliff Burdick <shaklee3 () gmail ! com>
Date:       2018-11-17 3:51:27
Message-ID: CA+Gp1naZNs_WrgiRhgaUhOQ71MeceQQXnc3ThpQkawakpxNvBg () mail ! gmail ! com
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I was able to trace down this issue to a particular function call I was
making on a closed-source library that scans the PCIe bus. I don't know why
it was causing it, since I can't see what it's doing. However, if I remove
that function call, the warnings go away completely. If I add it back, it
comes back reliably. For anyone else reading this, try moving your
rte_eal_init earlier in your startup to see if there's a particular
function causing it.

On Thu, Nov 15, 2018 at 12:33 PM Cliff Burdick <shaklee3@gmail.com> wrote:

> Not sure how that is happening. 1GB hugepages are enabled on boot, and
> that's the only one allocated:
>
> $ ls /sys/kernel/mm/hugepages/
> hugepages-1048576kB
>
> $ mount
> ...
> nodev on /mnt/huge type hugetlbfs (rw,relatime,pagesize=1024M)
>
> Any idea where the 4K alignment is coming from?
>
> On Thu, Nov 15, 2018 at 11:54 AM Kyle Larose <eomereadig@gmail.com> wrote:
>
>> On Thu, Nov 15, 2018 at 2:30 PM Cliff Burdick <shaklee3@gmail.com> wrote:
>> >
>> > Hi, I'm updating to 18.11 from 17.03, and I noticed there a several new
>> > warnings printing on startup in my primary process:
>> >
>> ...
>> > EAL: WARNING! Base virtual address hint (0x64002f000 != 0x680000000) not
>> > respected!
>> > EAL:    This may cause issues with mapping memory into secondary
>> processes
>> > EAL: WARNING! Base virtual address hint (0xe80030000 != 0xec0000000) not
>> > respected!
>> > EAL:    This may cause issues with mapping memory into secondary
>> processes
>> > EAL: WARNING! Base virtual address hint (0x16c0031000 != 0x1700000000)
>> not
>> > respected!
>> ...
>> >
>> > It appears by searching the mailing list that this problem is not very
>> > common since it's fairly new. Does anyone know what can cause this? I
>> have
>> > ASLR disabled.
>>
>> 4K pages vs huge-pages? It looks like the left-hand addresses are
>> 4K-aligned, while the right-hand ones are not.
>>
>
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