Mike Christie e297cd54b3 vhost_task: Allow vhost layer to use copy_process ... Qemu will create vhost devices in the kernel which perform network, SCSI, etc IO and management operations from worker threads created by 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, and it bypasses the RLIMIT_NPROC limit which can result in VMs creating more threads than the admin expected. This patch adds a new struct vhost_task which can be used instead of kthreads. They allow the vhost layer to use copy_process and inherit the userspace process's mm and cgroups, the task is accounted for under the userspace's nproc count and can be seen in its process tree, and other features like namespaces work and are inherited by default. Signed-off-by: Mike Christie <michael.christie@oracle.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>		2023-03-23 12:45:36 +01:00
..
bpf	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
cgroup	Networking changes for 6.3.	2023-02-21 18:24:12 -08:00
configs	mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED	2022-12-01 00:09:20 +01:00
debug	kdb: use srcu console list iterator	2022-12-02 11:25:00 +01:00
dma	swiotlb: mark swiotlb_memblock_alloc() as __init	2023-02-22 06:44:48 -08:00
entry	entry: kmsan: introduce kmsan_unpoison_entry_regs()	2022-10-03 14:03:25 -07:00
events	Char/Misc and other driver subsystem changes for 6.3-rc1	2023-02-24 12:47:33 -08:00
futex	- Prevent the leaking of a debug timer in futex_waitv()	2023-01-01 11:15:05 -08:00
gcov	gcov: add support for checksum field	2022-12-21 14:31:52 -08:00
irq	A set of updates for the interrupt susbsystem:	2023-03-05 11:19:16 -08:00
kcsan	kcsan: test: don't put the expect array on the stack	2023-01-02 08:59:33 -08:00
livepatch	Livepatching changes for 6.3	2023-02-23 14:00:10 -08:00
locking	RCU pull request for v6.3	2023-02-21 10:45:51 -08:00
module	modules-6.3-rc1	2023-02-23 14:05:08 -08:00
power	Merge branches 'powercap', 'pm-domains', 'pm-em' and 'pm-opp'	2023-02-15 20:06:26 +01:00
printk	printk changes for 6.3	2023-02-23 13:49:45 -08:00
rcu	Merge branch 'stall.2023.01.09a' into HEAD	2023-02-02 16:40:07 -08:00
sched	More power management updates for 6.3-rc1	2023-03-03 10:30:58 -08:00
time	Updates for timekeeping, timers and clockevent/source drivers:	2023-02-21 09:45:13 -08:00
trace	block-6.3-2023-03-03	2023-03-03 10:21:39 -08:00
.gitignore
acct.c	acct: fix potential integer overflow in encode_comp_t()	2022-11-30 16:13:18 -08:00
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c	capability: just use a 'u64' instead of a 'u32[2]' array	2023-03-01 10:01:22 -08:00
backtracetest.c
bounds.c
capability.c	capability: just use a 'u64' instead of a 'u32[2]' array	2023-03-01 10:01:22 -08:00
cfi.c
compat.c
configs.c
context_tracking.c	context_tracking: Fix noinstr vs KASAN	2023-01-13 11:48:18 +01:00
cpu.c	cpu/hotplug: Do not bail-out in DYING/STARTING sections	2022-12-02 12:43:02 +01:00
cpu_pm.c	cpuidle, cpu_pm: Remove RCU fiddling from cpu_pm_{enter,exit}()	2023-01-13 11:48:15 +01:00
crash_core.c	mm: remove 'First tail page' members from struct page	2023-02-02 22:32:59 -08:00
crash_dump.c
cred.c	cred: Do not default to init_cred in prepare_kernel_cred()	2022-11-01 10:04:52 -07:00
delayacct.c
dma.c
exec_domain.c
exit.c	arm64 updates for 6.3:	2023-02-21 15:27:48 -08:00
extable.c
fail_function.c	kernel/fail_function: fix memory leak with using debugfs_lookup()	2023-02-08 13:36:22 +01:00
fork.c	fork: allow kernel code to call copy_process	2023-03-12 10:54:43 +01:00
freezer.c
gen_kheaders.sh	kheaders: use standard naming for the temporary directory	2023-01-22 23:43:34 +09:00
groups.c
hung_task.c	hung_task: print message when hung_task_warnings gets down to zero.	2023-02-09 17:03:20 -08:00
iomem.c
irq_work.c
jump_label.c	jump_label: Prevent key->enabled int overflow	2022-12-01 15:53:05 -08:00
kallsyms.c	kallsyms: Add self-test facility	2022-11-15 00:42:02 -08:00
kallsyms_internal.h	kallsyms: Reduce the memory occupied by kallsyms_seqs_of_names[]	2022-11-12 18:47:36 -08:00
kallsyms_selftest.c	kallsyms: Fix scheduling with interrupts disabled in self-test	2023-01-13 15:09:08 -08:00
kallsyms_selftest.h	kallsyms: Add self-test facility	2022-11-15 00:42:02 -08:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	mm: replace vma->vm_flags direct modifications with modifier calls	2023-02-09 16:51:39 -08:00
kexec.c	kexec: introduce sysctl parameters kexec_load_limit_*	2023-02-02 22:50:05 -08:00
kexec_core.c	There is no particular theme here - mainly quick hits all over the tree.	2023-02-23 17:55:40 -08:00
kexec_elf.c
kexec_file.c	kexec: introduce sysctl parameters kexec_load_limit_*	2023-02-02 22:50:05 -08:00
kexec_internal.h
kheaders.c
kmod.c
kprobes.c	x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range	2023-02-21 08:49:16 +09:00
ksysfs.c	kernels/ksysfs.c: export kernel address bits	2023-01-20 14:30:45 +01:00
kthread.c	kthread: Pass in the thread's name during creation	2023-03-12 10:54:36 +01:00
latencytop.c
Makefile	vhost_task: Allow vhost layer to use copy_process	2023-03-23 12:45:36 +01:00
module_signature.c
notifier.c	kernel/notifier: Remove CONFIG_SRCU	2023-02-02 16:26:06 -08:00
nsproxy.c	fs/exec: switch timens when a task gets a new mm	2022-10-25 15:15:52 -07:00
padata.c	Kbuild updates for v6.2	2022-12-19 12:33:32 -06:00
panic.c	panic: fix the panic_print NMI backtrace setting	2023-03-02 21:54:23 -08:00
params.c	kernel/params.c: Use kstrtobool() instead of strtobool()	2023-01-25 14:07:21 -08:00
pid.c
pid_namespace.c	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
pid_sysctl.h	mm/memfd: add MFD_NOEXEC_SEAL and MFD_EXEC	2023-01-18 17:12:37 -08:00
profile.c
ptrace.c	rseq: Introduce extensible rseq ABI	2022-12-27 12:52:10 +01:00
range.c
reboot.c	kernel/reboot: Add SYS_OFF_MODE_RESTART_PREPARE mode	2022-10-04 15:59:36 +02:00
regset.c
relay.c	mm: replace vma->vm_flags direct modifications with modifier calls	2023-02-09 16:51:39 -08:00
resource.c	dax/kmem: Fix leak of memory-hotplug resources	2023-02-17 14:58:01 -08:00
resource_kunit.c
rseq.c	rseq: Extend struct rseq with per-memory-map concurrency ID	2022-12-27 12:52:12 +01:00
scftorture.c
scs.c	scs: add support for dynamic shadow call stacks	2022-11-09 18:06:35 +00:00
seccomp.c	seccomp: fix kernel-doc function name warning	2023-01-13 17:01:06 -08:00
signal.c	sched: Introduce per-memory-map concurrency ID	2022-12-27 12:52:11 +01:00
smp.c	bitmap patches for v6.1-rc1	2022-10-10 12:49:34 -07:00
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
static_call.c
static_call_inline.c	static_call: Add call depth tracking support	2022-10-17 16:41:16 +02:00
stop_machine.c
sys.c	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
sys_ni.c
sysctl-test.c
sysctl.c	sysctl: fix proc_dobool() usability	2023-02-21 13:34:07 -08:00
task_work.c
taskstats.c
torture.c	torture: Fix hang during kthread shutdown phase	2023-01-05 12:10:35 -08:00
tracepoint.c	tracepoint: Allow livepatch module add trace event	2023-02-18 14:34:36 -05:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c	umh: simplify the capability pointer logic	2023-03-03 16:18:19 -08:00
up.c
user-return-notifier.c
user.c	kernel/user: Allow user_struct::locked_vm to be usable for iommufd	2022-11-30 20:16:49 -04:00
user_namespace.c	userns: fix a struct's kernel-doc notation	2023-02-02 22:50:04 -08:00
usermode_driver.c
utsname.c
utsname_sysctl.c	kernel/utsname_sysctl.c: Fix hostname polling	2022-10-23 12:01:01 -07:00
vhost_task.c	vhost_task: Allow vhost layer to use copy_process	2023-03-23 12:45:36 +01:00
watch_queue.c
watchdog.c
watchdog_hld.c
workqueue.c	workqueue: Fold rebind_worker() within rebind_workers()	2023-01-13 07:50:40 -10:00
workqueue_internal.h