linux-kernel - Re: [PATCH 08/11][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support

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Date:	Fri, 14 Mar 2014 16:41:00 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	"Reddy\, Sreekanth" <Sreekanth.Reddy@....com>
Cc:	<jejb@...nel.org>, <JBottomley@...allels.com>,
	<linux-scsi@...r.kernel.org>, <Sathya.Prakash@....com>,
	<Nagalakshmi.Nandigama@....com>, <linux-kernel@...r.kernel.org>,
	<sreekanthreddy0547@...il.com>
Subject: Re: [PATCH 08/11][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support

>>>>> "Sreekanth" == Reddy, Sreekanth <Sreekanth.Reddy@....com> writes:

Sreekanth,

Sreekanth> The size of this contiguous block of memory pool is directly
Sreekanth> proportional to number of MSI-X vectors and the HBA queue
Sreekanth> depth. For example higher MSIX vectors requires larger
Sreekanth> contiguous block of memory pool.

Please also consider these patches that fix MSI-X issues on large
systems:

  http://marc.info/?l=linux-scsi&m=138879464506586

  http://marc.info/?l=linux-scsi&m=138879465206588

-- 
Martin K. Petersen	Oracle Linux Engineering
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