Jack Wang 3d7d72a34e x86/sgx: Break up long non-preemptible delays in sgx_vepc_release() ... On large enclaves we hit the softlockup warning with following call trace: xa_erase() sgx_vepc_release() __fput() task_work_run() do_exit() The latency issue is similar to the one fixed in: 8795359e35 ("x86/sgx: Silence softlockup detection when releasing large enclaves") The test system has 64GB of enclave memory, and all is assigned to a single VM. Release of 'vepc' takes a longer time and causes long latencies, which triggers the softlockup warning. Add cond_resched() to give other tasks a chance to run and reduce latencies, which also avoids the softlockup detector. [ mingo: Rewrote the changelog. ] Fixes: 540745ddbc ("x86/sgx: Introduce virtual EPC for use by KVM guests") Reported-by: Yu Zhang <yu.zhang@ionos.com> Signed-off-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Yu Zhang <yu.zhang@ionos.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Reviewed-by: Kai Huang <kai.huang@intel.com> Acked-by: Haitao Huang <haitao.huang@linux.intel.com> Cc: stable@vger.kernel.org		2023-09-06 23:55:09 +02:00
..
driver.c	mm: replace vma->vm_flags direct modifications with modifier calls	2023-02-09 16:51:39 -08:00
driver.h	x86/sgx: Add SGX_IOC_ENCLAVE_PROVISION	2020-11-18 18:02:50 +01:00
encl.c	x86/sgx: Avoid using iterator after loop in sgx_mmu_notifier_release()	2023-06-13 16:21:01 +02:00
encl.h	x86/sgx: Improve comments for sgx_encl_lookup/alloc_backing()	2022-08-15 11:51:49 +02:00
encls.h	x86/sgx: Add wrapper for SGX2 EAUG function	2022-07-07 10:13:01 -07:00
ioctl.c	mm/gup: remove unused vmas parameter from get_user_pages()	2023-06-09 16:25:25 -07:00
main.c	convert sgx_set_attribute() to fdget()/fdput()	2023-04-20 22:55:35 -04:00
Makefile	x86/sgx: Introduce virtual EPC for use by KVM guests	2021-04-06 09:43:17 +02:00
sgx.h	docs: move x86 documentation into Documentation/arch/	2023-03-30 12:58:51 -06:00
virt.c	x86/sgx: Break up long non-preemptible delays in sgx_vepc_release()	2023-09-06 23:55:09 +02:00