linux-kernel - Re: [PATCH 09/22] [SCSI] mpt2sas, mpt3sas: Added a support to set cpu affinity for each MSIX vector enabled by the HBA

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Message-ID: <yq1twzzzn6f.fsf@sermon.lab.mkp.net>
Date:	Fri, 09 Jan 2015 15:58:16 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Sreekanth Reddy <sreekanth.reddy@...gotech.com>
Cc:	martin.petersen@...cle.com, jejb@...nel.org, hch@...radead.org,
	linux-scsi@...r.kernel.org, JBottomley@...allels.com,
	Sathya.Prakash@...gotech.com, Nagalakshmi.Nandigama@...gotech.com,
	linux-kernel@...r.kernel.org, Elliott@...com
Subject: Re: [PATCH 09/22] [SCSI] mpt2sas, mpt3sas: Added a support to set cpu affinity for each MSIX vector enabled by the HBA

>>>>> "Sreekanth" == Sreekanth Reddy <sreekanth.reddy@...gotech.com> writes:

Sreekanth> Change_set: 1. Added affinity_hint varable of type
Sreekanth> cpumask_var_t in adapter_reply_queue structure. And allocated
Sreekanth> a memory for this varable by calling alloc_cpumask_var.
Sreekanth> 2. Call the API irq_set_affinity_hint for each MSIx vector to
Sreekanth> affiniate it with calculated cpus at driver inilization time.
Sreekanth> 3. While freeing the MSIX vector, call this same API to
Sreekanth> release the cpu affinity mask for each MSIx vector by
Sreekanth> providing the NULL value in cpumask argument.  4. then call
Sreekanth> the free_cpumask_var API to free the memory allocated in step
Sreekanth> 2.

(Still dreaming of a combined mpt2sas and mpt3sas so I wouldn't have to
review everything twice).

Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering
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