[RFC PATCH 1/1] x86/sgx: Explicitly give up the CPU in EDMM's ioctl() to avoid softlockup

EDMM's ioctl()s support batch operations, which may be time-consuming. Try to explicitly give up the CPU at the every end of "for loop" in sgx_enclave_{ modify_types | restrict_permissions | remove_pages} to give other tasks a chance to run, and avoid softlockup warning. The following has been obs

[RFC PATCH 0/1] x86/sgx: Explicitly give up the CPU in EDMM's ioctl() to avoid softlockup

Hi folks, If we run an enclave equipped with large EPC(30G or greater on my platfrom) on the Linux with kernel preemptions disabled(by configuring "CONFIG_PREEMPT_NONE=y"), we will get the following softlockup warning messages being reported in "dmesg" log: Is it an known issue? I can get the wa