Hi folks, I am using qemu and gdb to debug the Linux kernel. I wanted to stop one thread while letting other threads continue running. I found that there is a command called non-stop in gdb which can help me achieve my goal. The details of non-stop mode in gdb are shown in https://sourceware.org/gdb/current/onlinedocs/gdb.html/Non_002dStop-Mode.html
Here is my command to run qemu with the kernel image: sudo qemu-system-x86_64 -smp 4 -m 8G -drive if=ide,index=0,format=qcow2,file=./CentOS-7-x86_64-GenericCloud-2003.qcow2 -nographic -enable-kvm -device e1000,netdev=net0 -netdev user,id=net0 -s -S On another terminal, I run "gdb vmlinux". Then I followed what the tutorial said to enable non-stop mode: (gdb) set target-async 1 (gdb) set non-stop on (gdb) target remote:1234 Remote debugging using :1234 Non-stop mode requested, but the remote does not support non-stop. It seems that qemu does not support non-stop mode. Do I need to do something extra to enable non-stop mode in gdb and qemu? If it is not supported, how could I stop one thread while letting other threads continue running in gdb ?
