| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-id: <011101d0f5c7$638b1260$2aa13720$@samsung.com> Date: Wed, 23 Sep 2015 14:15:51 +0800 From: Chao Yu <chao2.yu@...sung.com> To: mingo@...hat.com, peterz@...radead.org Cc: linux-kernel@...r.kernel.org Subject: [PATCH] sched/fair: fix incorrect calculation of capacity in scale_rt_capacity div_u64 can only handle 32-bits divisor, if our divisor is with type of 64-bits, we should use div64_u64 instead, otherwise value of divisor will be cast to 32-bits, resulting in wrong calculation. Signed-off-by: Chao Yu <chao2.yu@...sung.com> --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 9176f7c..ee268ef 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6086,7 +6086,7 @@ static unsigned long scale_rt_capacity(int cpu) total = sched_avg_period() + delta; - used = div_u64(avg, total); + used = div64_u64(avg, total); if (likely(used < SCHED_CAPACITY_SCALE)) return SCHED_CAPACITY_SCALE - used; -- 2.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists