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Date: Thu, 14 Dec 2017 12:40:35 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: Anshuman Khandual <khandual@...ux.vnet.ibm.com> Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, mhocko@...e.com Subject: Re: [PATCH V3] mm/mprotect: Add a cond_resched() inside change_pmd_range() On Thu, 14 Dec 2017 19:35:51 +0530 Anshuman Khandual <khandual@...ux.vnet.ibm.com> wrote: > While testing on a large CPU system, detected the following RCU > stall many times over the span of the workload. This problem > is solved by adding a cond_resched() in the change_pmd_range() > function. > > [ 850.962530] INFO: rcu_sched detected stalls on CPUs/tasks: That's a bit rude. I think I'll add a cc:stable to this one.
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