Re: [PATCH v2 1/2] hpsa: limit transfer length to 1MB

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To: don.brace@xxxxxxxxxxxxx
Subject: Re: [PATCH v2 1/2] hpsa: limit transfer length to 1MB
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Mon, 26 Jun 2017 13:35:54 -0400
Cc: Yadan Fan <ydfan@xxxxxxxx>, martin.petersen@xxxxxxxxxx, jejb@xxxxxxxxxxxxxxxxxx, esc.storagedev@xxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <20170623094006.16807-1-ydfan@suse.com> (Yadan Fan's message of "Fri, 23 Jun 2017 17:40:05 +0800")
Organization: Oracle Corporation
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)

Don,

> The hpsa firmware will bypass the cache for any request larger than
> 1MB, so we should cap the request size to avoid any performance
> degradation in kernels later than v4.3

I assume you guys are OK with this change?

-- 
Martin K. Petersen	Oracle Linux Engineering

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References:
- [PATCH v2 1/2] hpsa: limit transfer length to 1MB
  - From: Yadan Fan

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