linux-kernel - Re: [PATCH v4] numa: make node_to_cpumask_map() NUMA_NO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Mon, 16 Sep 2019 20:55:01 +0800
From:   Yunsheng Lin <linyunsheng@...wei.com>
To:     Michal Hocko <mhocko@...nel.org>
CC:     <catalin.marinas@....com>, <will@...nel.org>, <mingo@...hat.com>,
        <bp@...en8.de>, <rth@...ddle.net>, <ink@...assic.park.msu.ru>,
        <mattst88@...il.com>, <benh@...nel.crashing.org>,
        <paulus@...ba.org>, <mpe@...erman.id.au>,
        <heiko.carstens@...ibm.com>, <gor@...ux.ibm.com>,
        <borntraeger@...ibm.com>, <ysato@...rs.sourceforge.jp>,
        <dalias@...c.org>, <davem@...emloft.net>, <ralf@...ux-mips.org>,
        <paul.burton@...s.com>, <jhogan@...nel.org>,
        <jiaxun.yang@...goat.com>, <chenhc@...ote.com>,
        <akpm@...ux-foundation.org>, <rppt@...ux.ibm.com>,
        <anshuman.khandual@....com>, <tglx@...utronix.de>, <cai@....pw>,
        <robin.murphy@....com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <hpa@...or.com>, <x86@...nel.org>,
        <dave.hansen@...ux.intel.com>, <luto@...nel.org>,
        <peterz@...radead.org>, <len.brown@...el.com>, <axboe@...nel.dk>,
        <dledford@...hat.com>, <jeffrey.t.kirsher@...el.com>,
        <linux-alpha@...r.kernel.org>, <naveen.n.rao@...ux.vnet.ibm.com>,
        <mwb@...ux.vnet.ibm.com>, <linuxppc-dev@...ts.ozlabs.org>,
        <linux-s390@...r.kernel.org>, <linux-sh@...r.kernel.org>,
        <sparclinux@...r.kernel.org>, <tbogendoerfer@...e.de>,
        <linux-mips@...r.kernel.org>, <rafael@...nel.org>,
        <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v4] numa: make node_to_cpumask_map() NUMA_NO_NODE aware

On 2019/9/16 20:23, Michal Hocko wrote:
> On Mon 16-09-19 20:07:22, Yunsheng Lin wrote:
> [...]
>>>> @@ -861,9 +861,12 @@ void numa_remove_cpu(int cpu)
>>>>   */
>>>>  const struct cpumask *cpumask_of_node(int node)
>>>>  {
>>>> -	if (node >= nr_node_ids) {
>>>> +	if (node == NUMA_NO_NODE)
>>>> +		return cpu_online_mask;
>>>> +
>>>> +	if ((unsigned int)node >= nr_node_ids) {
>>>>  		printk(KERN_WARNING
>>>> -			"cpumask_of_node(%d): node > nr_node_ids(%u)\n",
>>>> +			"cpumask_of_node(%d): node >= nr_node_ids(%u)\n",
>>>>  			node, nr_node_ids);
>>>>  		dump_stack();
>>>>  		return cpu_none_mask;
>>>
>>> Why do we need this?
>>
>> As the commit log says, the above cpumask_of_node() is for debugging,
>> it should catch other "node < 0" cases except NUMA_NO_NODE.
> 
> OK, I would just make it a separate patch.

Ok, thanks.

>