linux-kernel - Re: [PATCH V2 09/20] nvdimm/namespace_label: Skip region label during ns label DPA reservation

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Message-ID: <20250904143148.yqv5ialvoruzf5po@test-PowerEdge-R740xd>
Date: Thu, 4 Sep 2025 20:01:48 +0530
From: Neeraj Kumar <s.neeraj@...sung.com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: linux-cxl@...r.kernel.org, nvdimm@...ts.linux.dev,
	linux-kernel@...r.kernel.org, gost.dev@...sung.com,
	a.manzanares@...sung.com, vishak.g@...sung.com, neeraj.kernel@...il.com,
	cpgs@...sung.com
Subject: Re: [PATCH V2 09/20] nvdimm/namespace_label: Skip region label
 during ns label DPA reservation

On 13/08/25 04:09PM, Jonathan Cameron wrote:
>On Wed, 30 Jul 2025 17:41:58 +0530
>Neeraj Kumar <s.neeraj@...sung.com> wrote:
>
>> If Namespace label is present in LSA during nvdimm_probe then DPA
>> reservation is required. But this reservation is not required by region
>> label. Therefore if LSA scanning finds any region label, skip it.
>>
>> Signed-off-by: Neeraj Kumar <s.neeraj@...sung.com>
>> ---
>>  drivers/nvdimm/label.c | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
>> index c4748e30f2b6..064a945dcdd1 100644
>> --- a/drivers/nvdimm/label.c
>> +++ b/drivers/nvdimm/label.c
>> @@ -452,6 +452,10 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
>>  		lsa_label = to_label(ndd, slot);
>>  		nd_label = &lsa_label->ns_label;
>>
>> +		/* skip region label, dpa reservation for ns label only */
>Confusing comment and not clear if skip applies just to region label or
>to dpa reservation as well.
>
>		/* Skip region label.  DPA reservation is for NS label only. */
>
>or something along those lines (assuming I have understood this right!)

Sure Jonathan, I will fix it in next patch-set


Regards,
Neeraj