This patchset adds a couple new options to kernel_clone_args for IO thread
like/related users. Instead of adding new fields to kernel_clone_args for
each option, this moves us to a flags based approach by first converting
io_thread.
Signed-off-by: Mike Christie
---
include/linux/sched/task.h |
We need to break up PF_IO_WORKER into the parts that are used for
scheduling and signal handling and the part that tells copy_thread to
treat it as a special type of thread during setup. This patch passes the
worker_flags to copy_thread, so in the next patch we can add new worker
flags that
Each vhost device gets a thread that is used to perform IO and management
operations. Instead of a thread that is accessing a device, the thread is
part of the device, so when it calls the kernel_worker() function added in
the next patch we can't dup or clone the parent's files/FDS because it
The vhost layer has similar requirements as io_uring where its worker
threads need to access the userspace thread's memory, want to inherit the
parents's cgroups and namespaces, and be checked against the parent's
RLIMITs. Right now, the vhost layer uses the kthread API which has
kthread_use_mm
The vhost worker threads need the same frame setup as io_uring's worker
threads, but handle signals differently and do not need the same
scheduling behavior. This patch separate's the frame setup parts of
PF_IO_WORKER into a kernel_clone_args flag, KERN_WORKER_USER.
Signed-off-by: Mike Christie
The kthread API creates threads that ignore all signals by default so
modules like vhost that will move from that API to kernel_worker will
not be expecting them. This patch adds a worker flag that tells
kernel_worker to setup the task to ignore signals.
Signed-off-by: Mike Christie
---
Convert io_uring and io-wq to use kernel_worker.
Signed-off-by: Mike Christie
---
fs/io-wq.c | 15 ---
fs/io_uring.c | 11 +--
include/linux/sched/task.h | 1 -
3 files changed, 13 insertions(+), 14 deletions(-)
diff --git a/fs/io-wq.c
For vhost workers we use the kthread API which inherit's its values from
and checks against the kthreadd thread. This results in cgroups v2 not
working and the wrong RLIMITs being checked. This patch has us use the
kernel_copy_process function which will inherit its values/checks from the
thread
This is just a prep patch. It moves the worker related fields to a new
vhost_worker struct and moves the code around to create some helpers that
will be used in the next patches.
Signed-off-by: Mike Christie
Reviewed-by: Stefan Hajnoczi
---
drivers/vhost/vhost.c | 98
The following patches were made over Linus's tree but also apply over
Jens's 5.16 io_uring branch and Michaels' vhost/next branch.
This is version 2 of the patchset and should handle all the review
comments posted in V1 here:
On Tue, Sep 21 2021, Halil Pasic wrote:
> On Mon, 20 Sep 2021 12:07:23 +0200
> Cornelia Huck wrote:
>
>> On Mon, Sep 20 2021, Vineeth Vijayan wrote:
>>
>> > On Mon, 2021-09-20 at 00:39 +0200, Halil Pasic wrote:
>> >> On Fri, 17 Sep 2021 10:40:20 +0200
>> >> Cornelia Huck wrote:
>> >>
>>
On Fri, Apr 23, 2021 at 03:21:39PM +0530, Vivek Gautam wrote:
> Redirect the incoming page faults to the registered fault handler
> that can take the fault information such as, pasid, page request
> group-id, address and pasid flags.
>
> Signed-off-by: Vivek Gautam
> ---
>
On Fri, Apr 23, 2021 at 03:21:41PM +0530, Vivek Gautam wrote:
> Add a feature flag to virtio iommu for Shared virtual addressing
> (SVA). This feature would indicate the availablily path for handling
> device page faults, and the provision for sending page response.
In this case the feature
On Fri, Apr 23, 2021 at 03:21:44PM +0530, Vivek Gautam wrote:
> Implementing the alloc_shared_cd and free_shared_cd in cd-lib, and
> start using them for arm-smmu-v3-sva implementation.
>
> Signed-off-by: Vivek Gautam
> ---
> .../arm/arm-smmu-v3/arm-smmu-v3-cd-lib.c | 71
>
On Fri, Apr 23, 2021 at 03:21:45PM +0530, Vivek Gautam wrote:
> SVA bind and unbind implementations will allow to prepare translation
> context with CPU page tables that can be programmed into host iommu
> hardware to realize shared address space utilization between the CPU
> and virtualized
Hi Vivek,
Thanks a lot for your work on this
On Fri, Apr 23, 2021 at 03:21:37PM +0530, Vivek Gautam wrote:
> Add fault information for group-id and necessary flags for page
> request faults that can be handled by page fault handler in
> virtio-iommu driver.
>
> Signed-off-by: Vivek Gautam
>
On Fri, Apr 23, 2021 at 03:21:38PM +0530, Vivek Gautam wrote:
> Keeping a record of list of endpoints that are served by the virtio-iommu
> device would help in redirecting the requests of page faults to the
> correct endpoint device to handle such requests.
>
> Signed-off-by: Vivek Gautam
> ---
On Fri, Apr 23, 2021 at 03:21:46PM +0530, Vivek Gautam wrote:
> Once the page faults are handled, the response has to be sent to
> virtio-iommu backend, from where it can be sent to the host to
> prepare the response to a generated io page fault by the device.
> Add a new virt-queue request type
On Tue, 21 Sep 2021 15:31:03 +0200
Vineeth Vijayan wrote:
> On Tue, 2021-09-21 at 05:25 +0200, Halil Pasic wrote:
> > On Mon, 20 Sep 2021 12:07:23 +0200
> > Cornelia Huck wrote:
> >
> > > On Mon, Sep 20 2021, Vineeth Vijayan wrote:
> > >
> > > > On Mon, 2021-09-20 at 00:39 +0200, Halil
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