vfio module crash know when i used dpdk secondary process send pkts

[Pathak, Pravin]

I am not 100% sure if this might be the cause, but please try disabling Linux ASLR.

$  echo 0 | sudo tee /proc/sys/kernel/randomize_va_space


From: wangpcmic at 163.com <wangpcmic at 163.com>
Sent: Sunday, August 27, 2023 9:23 PM
To: 15720603159 <15720603159 at 163.com>
Cc: users <users at dpdk.org>
Subject: Re: vfio module crash know when i used dpdk secondary process send pkts

作业写完没.

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wangpcmic
邮箱：wangpcmic at 163.com<mailto:wangpcmic at 163.com>


---- Replied Message ----
From
jinag<15720603159 at 163.com><mailto:15720603159 at 163.com>
Date
08/23/2023 19:20
To
users at dpdk.org<mailto:users at dpdk.org>
Cc
Subject
vfio module crash when i used dpdk secondary process send pkts
when I use dpdk to call rte_eth_tx_burst function for sending data from the secondary process, vfio will crash:

PID: 60699 TASK: ffff8f0152235df00 CPU: 14  COMMAND: "testlstack02"
 #0 [ffffa7d8cecc39a8] machine_kexec at ffffffff9045d67b
 #1 [ffffa7d8ceec3a00] __crash_kexec at ffffffff90562e92
 #2 [ffffa7d8ceec3ac0] panic at ffffffff904b9b79
 #3 [ffffa7d8ceec3b48] oops_end at ffffffff904231fc
 #4 [ffffa7d8ceec3b70] remap_pfn_range at ffffffff90664772
 #5 [ffffa7d8ceec3c58] remap_pfn_range at ffffffff90664772
 #6 [ffffa7d8ceec3da0] vfio_pci_mmap_fault at ffffffffc-bda821 [vfio_pci]
 #7 [ffffa7d8ceec3dc0] __do_fault at ffffffff90662ee9
 #8 [ffffa7d8ceec3df0] do fault at ffffffff90663b2c
 #9 [ffffa7d8ceec3e90] __handle_mm_fault at ffffffff90663c9c
#10 [ffffa7d8ceec3ec0] handle_mm_fault at ffffffff9047103b
#11 [ffffa7d8ceec3ee0] __do_page_fault at ffffffff904712e1
#12 [ffffa7d8ceec3f20] do_page_fault at ffffffff9047122e
#13 [ffffa7d8ceec3f50] page_fault at ffffffff90e012de

The crash occurs when the secondary queue of the secondary process send pkts. I have tested that the primary process and the first queue of the secondary process do not crash. I use i40e X710 nic.

Has anyone ever encountered simlilar issue? please provide some ideas for fixing the issue.
Thanks!

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