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Date: Wed, 14 Mar 2018 13:19:01 -0700 From: Vineet Gupta <Vineet.Gupta1@...opsys.com> To: Alexey Brodkin <Alexey.Brodkin@...opsys.com> CC: Peter Zijlstra <peterz@...radead.org>, "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-snps-arc@...ts.infradead.org" <linux-snps-arc@...ts.infradead.org> Subject: Re: Do we need to disable preemption in flush_tlb_range()? +CC Peter since we have his attention ;-) On 03/01/2018 07:13 AM, Alexey Brodkin wrote: > Hi Vineet, > > Just noticed that in comments for smp_call_function_many() it is said that > preemption must be disabled during its execution. And that function gets executed > among other ways like that: > -------------------------->8----------------------- > flush_tlb_range() > -> on_each_cpu_mask() > -> smp_call_function_many() > -------------------------->8----------------------- In general I prefer not to - Peter what say you ? > > I'm not seeing right now any real problem with current implementation but > some architectures do that thus the question. > > -Alexey >
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