hotplug_mp/test_attach_detach_dev_primary_cross_loop: Segmentation fault when detach device
https://bugs.dpdk.org/show_bug.cgi?id=680
Bug ID: 680
Summary: [dpdk-21.05]hotplug_mp/test_attach_detach_dev_primary_
cross_loop: Segmentation fault when detach device
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: examples
Assignee: [email protected]
Reporter: [email protected]Target Milestone: ---
Environment
DPDK version: Use make showversion or for a non-released version: git remote -v && git show-ref --heads
21.05.0-rc0:89813a522e68076e6f50ec18b075fa57cc5ae937
Other software versions: name/version for QEMU, OVS, etc. Repeat as required. OS: CentOS Stream 8 4.18.0-269.el8.x86_64
Compiler: gcc (GCC) 8.4.1 20200928 (Red Hat 8.4.1-1)
Hardware platform: Intel(R) Xeon(R) Gold 6252N CPU @ 2.30GHz
NIC hardware: XXV710 for 25GbE SFP28 158b
Driver version: 2.8.20-k
NIC firmware: 8.00 0x80008bb1 1.2766.0
Test Setup
Steps to reproduce
List the steps to reproduce the issue.
1. build dpdk
# rm -rf x86_64-native-linuxapp-gcc # CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dc_args='-DRTE_EAL_IGB_UIO=1' --default-library=static x86_64-native-linuxapp-gcc # ninja -C x86_64-native-linuxapp-gcc -j 70 # meson configure -Dexamples=multi_process/hotplug_mp x86_64-native-linuxapp-gcc # ninja -C x86_64-native-linuxapp-gcc 2. lanch app # Open three dut terminals # terminal1：x86_64-native-linuxapp-gcc/examples/dpdk-hotplug_mp --proc-type=auto # terminal2：x86_64-native-linuxapp-gcc/examples/dpdk-hotplug_mp --proc-type=auto # terminal3：x86_64-native-linuxapp-gcc/examples/dpdk-hotplug_mp --proc-type=auto # terminal1：list # terminal2：list # terminal3：list # terminal1：attach 0000:18:00.0 # terminal1：list # terminal2：list # terminal3：list # terminal3: detach 0000:18:00.0
Show the output from the previous commands:
Output of Terninal3: Failed to send hotplug request to primary. example> detach 0000:18:00.0
detaching...
EAL: Releasing PCI mapped resource for 0000:18:00.0
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2200000000
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2201000000
EAL: Fail to recv reply for request /var/run/dpdk/rte/mp_socket:eal_dev_mp_request
EAL: Cannot send request to primary
EAL: Failed to send hotplug request to primary
failed to dettach device 0000:18:00.0
Output of Terninal2:
example> list
list all etherdev
0 0000:18:00.0
example> EAL: Releasing PCI mapped resource for 0000:18:00.0
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2200000000
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2201000000 example> list
list all etherdev
example>
Output of Terninal1: will shouw "segmentation fault" example> EAL: Releasing PCI mapped resource for 0000:18:00.0
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2200000000
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2201000000 Segmentation fault (core dumped)
Expected Result
Explain what is the expected result in text or as an example output:
detaching...
EAL: Releasing PCI mapped resource for 0000:18:00.0
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2200000000
EAL: Calling pci_unmap_resource for 0000:18:00.0 at 0x2201000000 detached device 0000:18:00.0
Regression
Is this issue a regression: (Y/N) Y
Bad commitid : 64051bb1f144c418f3fc76e6d0973337b05d5886
git show 64051bb1f144c418f3fc76e6d0973337b05d5886 commit 64051bb1f144c418f3fc76e6d0973337b05d5886 (HEAD)
Author: Xueming Li <[email protected]>
Date: Tue Apr 13 03:14:08 2021 +0000
devargs: unify scratch buffer storage
In current design, legacy parser rte_devargs_parse() saved scratch buffer to devargs.args while new parser rte_devargs_layers_parse() saved to devargs.data. Code using devargs had to know the difference and cleaned up memory accordingly - error prone.
This patch unifies scratch buffer to data field, introduces rte_devargs_reset() function to wrap the memory clean up logic.
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