On Thu, 29 Jun 2023 10:53:39 +0800 Weifeng Su <suweife...@huawei.com> wrote:
> In this scenario, the DPDK process invokes a script which > inherits an open file descriptor (FD) for a UIO device. > After the script execution is complete, the UIO device's > close operation is called. However, in a new kernel version > (865a11f987ab5f03:uio/uio_pci_generic: Disable bus-mastering on release), > this close operation causes the PCI bus master bit to be cleared, > rendering the device unusable and leading to unexpected behavior. > > This modification was made to prevent the UIO device's FD > from being inherited by the child process. > > Signed-off-by: Weifeng Su <suweife...@huawei.com> Makes sense, the eventfd used form VFIO is already marked as close on exec. Acked-by: Stephen Hamminger <step...@networkplumber.org>
