Messages in this thread | | | Date | Wed, 9 Mar 2022 19:29:47 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 1/1] mm/page_alloc: add scheduling point to free_unref_page_list |
| |
On Thu, 10 Mar 2022 10:48:41 +0800 wangjianxing <wangjianxing@loongson.cn> wrote:
> spin_lock will preempt_disable(), interrupt context will > __irq_enter/local_bh_disable and also add preempt count with offset. > > cond_resched check whether if preempt_count == 0 in first and won't > schedule in previous context. > > Is this right? > > > With another way, could we add some condition to avoid call cond_resched > in interrupt context or spin_lock()? > > + if (preemptible()) > + cond_resched(); >
None of this works with CONFIG_PREEMPTION=n.
| |