Big spike in DPDK process VSZ since release 18.05.1

https://bugs.dpdk.org/show_bug.cgi?id=386

            Bug ID: 386
           Summary: Big spike in DPDK process VSZ since release 18.05.1
           Product: DPDK
           Version: 19.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: core
          Assignee: [email protected]
          Reporter: [email protected]

Target Milestone: ---

Hello,

I am currently using DPDK 19.11. I notice the process virtual size is huge.

I tried running the test PMD. It takes 64G VSZ and if I use the '--in-memory' option it goes up to 188G.

Is there anyway to disable allocation of such huge VSZ in DPDK ?

Also I found that version 18.02.2 doesn't have the problem, but 18.05.1 and further releases have it.

Would really appreciate if someone can help, if there is a patch to get over this issue in the DPDK code ?
This is becoming a huge practical issue as huge core files are getting generated. On multi NUMA setup, the VSZ goes above 400G and I can't get core files to debug crashes in my app.

Regards,
Siddarth

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