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@163.com Sent: Sunday, August 27, 2023 9:23 PM To: 15720603159 <15720603159@163.com> Cc: users Subject: Re: vfio module crash know when i used dpdk secondary process send pkts 作业写完没. [https://mail-online.nosdn.127.net/qiyelogo/defaultAvatar.png] wangpcmic 邮箱：wangpcmic@163.com ---- Replied Message ---- From jinag<15720603159@163.com> Date 08/23/2023 19:20 To users@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!