On Fri, 2023-08-18 at 20:07 +0200, Jack Wang wrote:
We hit softlocup with following call trace:
? asm_sysvec_apic_timer_interrupt+0x16/0x20 xa_erase+0x21/0xb0 ? sgx_free_epc_page+0x20/0x50 sgx_vepc_release+0x75/0x220 __fput+0x89/0x250 task_work_run+0x59/0x90 do_exit+0x337/0x9a0
Similar like commit 8795359e35bc ("x86/sgx: Silence softlockup detection when releasing large enclaves"). The test system has 64GB of enclave memory, and all assigned to a single VM. Release vepc take longer time and triggers the softlockup warning.
Add cond_resched() to give other tasks a chance to run and placate the softlockup detector.
Cc: Jarkko Sakkinen jarkko@kernel.org Cc: Haitao Huang haitao.huang@linux.intel.com Cc: stable@vger.kernel.org Fixes: 540745ddbc70 ("x86/sgx: Introduce virtual EPC for use by KVM guests") Reported-by: Yu Zhang yu.zhang@ionos.com Tested-by: Yu Zhang yu.zhang@ionos.com Acked-by: Haitao Huang haitao.huang@linux.intel.com Reviewed-by: Jarkko Sakkinen jarkko@kernel.org Signed-off-by: Jack Wang jinpu.wang@ionos.com
Reviewed-by: Kai Huang kai.huang@intel.com