On Wed, 30 Nov 2016 15:15:19 +0800 wrote:
> From: Jinling Ke
>
> when Oops in printk, printk will call zap_locks() to reinitialize
> spinlock to prevent deadlock. In arm, arm64, x86 or other
> architecture smp cpu, race condition will occur in printk spinlock
> logbuf_lock and then it will resu
On Wed, Nov 30, 2016 at 11:56:53AM +0100, Petr Mladek wrote:
> On Wed 2016-11-30 15:15:19, linyongt...@huawei.com wrote:
> > In arm, arm64, x86 or other architecture, spinlock variable
x86 no longer uses ticket locks.
> > The solution is that In function zap_locks(), replace
> > raw_spin_lock_ini
On Wed 2016-11-30 15:15:19, linyongt...@huawei.com wrote:
> From: Jinling Ke
>
> when Oops in printk, printk will call zap_locks() to reinitialize
> spinlock to prevent deadlock. In arm, arm64, x86 or other
> architecture smp cpu, race condition will occur in printk spinlock
> logbuf_lock and the
From: Jinling Ke
when Oops in printk, printk will call zap_locks() to reinitialize
spinlock to prevent deadlock. In arm, arm64, x86 or other
architecture smp cpu, race condition will occur in printk spinlock
logbuf_lock and then it will result other cpu that is waiting printk
spinlock in deadlock
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