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Groups > linux.kernel > #1579670
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] sched/isolcpus: Show isolated cpu map |
| Date | 2017-02-13 13:10 +0100 |
| Message-ID | <tanC9-3wl-19@gated-at.bofh.it> (permalink) |
| References | <talqF-1VB-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Feb 13, 2017 at 05:43:59PM +0800, Kefeng Wang wrote:
> The commit a6e4491c682a ("sched/isolcpus: Output warning when the
> 'isolcpus=' kernel parameter is invalid") adds an error message
> when specified cpu bigger than nr_cpu_ids, but nr_cpumask_bits in
> cpulist_parse() could be nr_cpu_ids or NR_CPUS.
>
> eg, NR_CPUS=64, nr_cpu_ids=8 in ARM64, cpulist_parse() won't return
> -ERANGE if isolcpus=1-10;
>
But why does cpulist_parse() use nr_cpumask_bits, that seems to be the
problem, so why not look there?
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[PATCH] sched/isolcpus: Show isolated cpu map Kefeng Wang <wangkefeng.wang@huawei.com> - 2017-02-13 10:50 +0100
Re: [PATCH] sched/isolcpus: Show isolated cpu map Peter Zijlstra <peterz@infradead.org> - 2017-02-13 13:10 +0100
Re: [PATCH] sched/isolcpus: Show isolated cpu map Kefeng Wang <wangkefeng.wang@huawei.com> - 2017-02-13 14:10 +0100
Re: [PATCH] sched/isolcpus: Show isolated cpu map Peter Zijlstra <peterz@infradead.org> - 2017-02-13 14:40 +0100
Re: [PATCH] sched/isolcpus: Show isolated cpu map Kefeng Wang <wangkefeng.wang@huawei.com> - 2017-02-14 03:00 +0100
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