From: Xingjun Liu <xingjun.lxj@alibaba-inc.com> anolis inclusion from anolis_master commit 7afda44c8a9e043f8f16dcc57dd8ef615522e2c8 category: performance bugzilla: NA CVE: NA --------------------------- alinux: random: speed up the initialization of module During the module initialization phase, entropy will be added to entropy pool for every interrupt, the change should speed up initialization of the random module. Before optimization: [ 22.180236] random: crng init done After optimization: [ 1.474832] random: crng init done Signed-off-by: Xingjun Liu <xingjun.lxj@alibaba-inc.com> Reviewed-by: Liu Jiang <gerry@linux.alibaba.com> Reviewed-by: Caspar Zhang <caspar@linux.alibaba.com> Reviewed-by: Jia Zhang <zhang.jia@linux.alibaba.com> Reviewed-by: Yang Shi <yang.shi@linux.alibaba.com> Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com> Signed-off-by: Chen Jialong <chenjialong@huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com> Reviewed-by: Ziyuan Hu <huziyuan@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/char/random.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/char/random.c b/drivers/char/random.c index 347d9e1f65798..72d47ac06af97 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1274,7 +1274,8 @@ void add_interrupt_randomness(int irq, int irq_flags) } if ((fast_pool->count < 64) && - !time_after(now, fast_pool->last + HZ)) + !time_after(now, fast_pool->last + HZ) && + crng_ready()) return; r = &input_pool; -- 2.25.1