On 5/17/22 1:11 AM, Nicolin Chen wrote:
On Mon, May 16, 2022 at 08:41:16PM -0300, Jason Gunthorpe wrote:
The atomic based scheme for tracking the group->container and group->kvm
has two race conditions, simplify it by adding a rwsem to protect those
values and related and remove the atomics.
This is on github: https://github.com/jgunthorpe/linux/commits/vfio_group_locking
v2:
- Updated comments and commit messages
- Rebased on vfio next
- Left the dev_warn in place, will adjust it later
- s/singleton_file/opened_file/
v1: https://lore.kernel.org/r/0-v1-c1d14aae2e8f+2f4-vfio_group_locking_jgg@xxxxxxxxxx
Cc: Nicolin Chen <nicolinc@xxxxxxxxxx>
Sanity tested on x86_64 and ARM64.
Tested-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
Also sanity tested this series on s390x (vfio-pci and vfio-ap)
Tested-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
