linux-kernel - Re: [PATCH v2 2/2] sched/numa: Add tracepoint that tracks the skipping of numa balancing due to cpuset memory pinning

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Message-ID: <73227d82-d641-4b95-9ad2-e156f655429e@oracle.com>
Date: Wed, 26 Mar 2025 21:32:32 -0700
From: Libo Chen <libo.chen@...cle.com>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: peterz@...radead.org, mgorman@...hsingularity.net, longman@...hat.com,
        linux-kernel@...r.kernel.org, mingo@...hat.com, tj@...nel.org
Subject: Re: [PATCH v2 2/2] sched/numa: Add tracepoint that tracks the
 skipping of numa balancing due to cpuset memory pinning



On 3/26/25 19:06, Steven Rostedt wrote:
> On Wed, 26 Mar 2025 17:40:02 -0700
> Libo Chen <libo.chen@...cle.com> wrote:
> 
>>> +	TP_printk("comm=%s pid=%d tgid=%d ngid=%d mem_node_allowed_mask=%lx",  
>>
>>
>> I cannot find a way to print out nodemask_t nicely here with %*pbl.
>> So I fall back to just raw hex value. Will be grateful if someone
>> knows a better way to print nodemask nicely in a tracepoint  
> 
> Ug.
> 
> I guess I need to add support for that. Both in the boot verifier as well
> as in libtraceevent.
> 

That will be fantastic, I think this is quite useful.

Thanks,
Libo

> -- Steve