DPDK patches and discussions
 help / color / mirror / Atom feed
From: xiangxia.m.yue@gmail.com
To: mattias.ronnblom@ericsson.com
Cc: dev@dpdk.org, Tonghao Zhang <xiangxia.m.yue@gmail.com>, stable@dpdk.org
Subject: [dpdk-dev] [PATCH dpdk-dev] rte_random: fix crash when random init
Date: Sun, 12 Apr 2020 16:27:53 +0800	[thread overview]
Message-ID: <1586680073-11075-1-git-send-email-xiangxia.m.yue@gmail.com> (raw)

From: Tonghao Zhang <xiangxia.m.yue@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@dpdk.org

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
---
 lib/librte_eal/linux/eal_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/linux/eal_timer.c b/lib/librte_eal/linux/eal_timer.c
index a904a8297cd2..4067e46da534 100644
--- a/lib/librte_eal/linux/eal_timer.c
+++ b/lib/librte_eal/linux/eal_timer.c
@@ -26,7 +26,7 @@
 #include "eal_private.h"
 #include "eal_internal_cfg.h"
 
-enum timer_source eal_timer_source = EAL_TIMER_HPET;
+enum timer_source eal_timer_source = EAL_TIMER_TSC;
 
 #ifdef RTE_LIBEAL_USE_HPET
 
-- 
1.8.3.1


             reply	other threads:[~2020-04-12 13:42 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-12  8:27 xiangxia.m.yue [this message]
2020-04-14  4:06 ` Stephen Hemminger
2020-04-14  4:43   ` Tonghao Zhang
2020-04-14 13:19     ` Mattias Rönnblom
2020-04-14 13:35       ` David Marchand
2020-04-14 15:37         ` Mattias Rönnblom
2020-04-14 23:42           ` Tonghao Zhang
2020-04-15  6:01             ` Mattias Rönnblom
2020-04-15  8:10               ` David Marchand

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1586680073-11075-1-git-send-email-xiangxia.m.yue@gmail.com \
    --to=xiangxia.m.yue@gmail.com \
    --cc=dev@dpdk.org \
    --cc=mattias.ronnblom@ericsson.com \
    --cc=stable@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).