From: Xingjun Liu <xingjun.lxj@alibaba-inc.com> maillist inclusion category: performance bugzilla: https://gitee.com/openeuler/kernel/issues/I8K30G CVE: NA Reference: https://gitee.com/openeuler/kernel/commit/ae624897ce3846524a3b0d3e525d8f8a8f... --------------------------- 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> Signed-off-by: Chen Jun <chenjun102@huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com> Signed-off-by: Chen Jun <chenjun102@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Signed-off-by: GUO Zihua <guozihua@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 3cb37760dfec..b9ae54c243a9 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1100,7 +1100,8 @@ void add_interrupt_randomness(int irq) if (new_count & MIX_INFLIGHT) return; - if (new_count < 1024 && !time_is_before_jiffies(fast_pool->last + HZ)) + if (new_count < 1024 && !time_is_before_jiffies(fast_pool->last + HZ) && + crng_ready()) return; fast_pool->count |= MIX_INFLIGHT; -- 2.34.1