Re: [RFC][PATCH] vhost/vsock: Add vsock_list file to map cid with vhost tasks
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2021-05-13 16:08:53
Also in:
kvm, lkml, netdev
On Thu, 13 May 2021 16:57:34 +0100 Stefan Hajnoczi [off-list ref] wrote:
This approach relies on process hierarchy of the VMM (QEMU). Multi-process QEMU is in development and will allow VIRTIO devices to run as separate processes from the main QEMU. It then becomes harder to correlate a VIRTIO device process with its QEMU process.
And we need to know all these mapping regardless, as we need to map each thread / process to the vCPU in order to correlate between host thread and vCPU thread for showing in KernelShark. Thus this mapping to find the main thread/process needs to be done regardless.
So I think in the end this approach ends up being as fragile as parsing command-lines. The kernel doesn't really have the concept of a "VM" that the vhost_vsock is associated with :). Maybe just parse QEMU and crosvm command-lines?
That's what we do now, and it already broke once, and even parsing the command line wont be enough for the stated reasons above. -- Steve _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization