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@xxxxxxxxxx>
> Cc: Haitao Huang <haitao.huang@xxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 540745ddbc70 ("x86/sgx: Introduce virtual EPC for use by KVM guests")
> Reported-by: Yu Zhang <yu.zhang@xxxxxxxxx>
> Tested-by: Yu Zhang <yu.zhang@xxxxxxxxx>
> Acked-by: Haitao Huang <haitao.huang@xxxxxxxxxxxxxxx>
> Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
> Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxx>
Reviewed-by: Kai Huang <kai.huang@xxxxxxxxx>
