Re: [PATCH 00/11] Use copy_process in vhost layer

[Christian Brauner]

From: Christian Brauner (Microsoft) <brauner@xxxxxxxxxx>


On Fri, 10 Mar 2023 16:03:21 -0600, Mike Christie wrote:
> The following patches were made over Linus's tree and apply over next. They
> allow the vhost layer to use copy_process instead of using
> workqueue_structs to create worker threads for VM's devices.
> 
> Details:
> Qemu will create vhost devices in the kernel which perform network or SCSI,
> IO and perform management operations from worker threads created with the
> kthread API. Because the kthread API does a copy_process on the kthreadd
> thread, the vhost layer has to use kthread_use_mm to access the Qemu
> thread's memory and cgroup_attach_task_all to add itself to the Qemu
> thread's cgroups.
> 
> [...]

I've picked this up now and it should show up in -next tomorrow.
Thanks for the patience,

tree: git@xxxxxxxxxxxxxxxxxxx:pub/scm/linux/kernel/git/brauner/linux kernel.user_worker

[01/11] csky: Remove kernel_thread declaration
        commit: e0a98139c162af9601ffa8d6db88dbe745f64b3c
[02/11] kernel: Allow a kernel thread's name to be set in copy_process
        commit: cf587db2ee0261c74d04f61f39783db88a0b65e4
[03/11] kthread: Pass in the thread's name during creation
        commit: 73e0c116594d99f807754b15e474690635a87249
[04/11] kernel: Make io_thread and kthread bit fields
        commit: c81cc5819faf5dd77124f5086aa654482281ac37
[05/11] fork/vm: Move common PF_IO_WORKER behavior to new flag
        commit: 54e6842d0775ba76db65cbe21311c3ca466e663d
[06/11] fork: add kernel_clone_args flag to not dup/clone files
        commit: 11f3f500ec8a75c96087f3bed87aa2b1c5de7498
[07/11] fork: Add kernel_clone_args flag to ignore signals
        commit: 094717586bf71ac20ae3b240d2654d826634b21e
[08/11] fork: allow kernel code to call copy_process
        commit: 89c8e98d8cfb0656dbeb648572df5b13e372247d
[09/11] vhost_task: Allow vhost layer to use copy_process
        commit: 77feab3c4156229511b378f15c0a16574d9c08ea
[10/11] vhost: move worker thread fields to new struct
        commit: d45e2b73ead0daec350680fbf20144a2d3670186
[11/11] vhost: use vhost_tasks for worker threads
        commit: 5ab18f4b061ef24a71eea9ffafebd1a82ae2f514