[dpdk-stable] [dpdk-dev] [PATCH dpdk-dev] rte_random: fix crash when random init

[Stephen Hemminger]

On Sun, 12 Apr 2020 16:27:53 +0800
xiangxia.m.yue at gmail.com wrote:

> From: Tonghao Zhang <xiangxia.m.yue at gmail.com>
> 
> When rte_rand_init is invoked, and the kernel
> (kernel version < 3.17) running dpdk does't support
> *getentropy, at the same time, the cpu does't support
> rdseed, the rte_rand_init will invoke rte_get_timer_cycles
> which function will invoke rte_get_hpet_cycles
> (RTE_LIBEAL_USE_HPET was enabled) while *eal_hpet is not
> allocated.
> 
> Fixes: faf8fd252785 ("eal: improve entropy for initial PRNG seed")
> Fixes: 3f002f069612 ("eal: replace libc-based random generation with LFSR")
> 
> Cc: stable at dpdk.org
> 
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue at gmail.com>

Are you sure this patch won't change current default to use HPET (which is slower)?
Before this patch users would get TSC as default.