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

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  Re: [PATCH 1/2] hpsa: limit transfer length to 1MB Johannes Thumshirn <jthumshirn@suse.de> - 2017-06-22 12:10 +0200
    Re: [PATCH 1/2] hpsa: limit transfer length to 1MB Yadan Fan <ydfan@suse.com> - 2017-06-23 11:20 +0200

#1672483 — Re: [PATCH 1/2] hpsa: limit transfer length to 1MB

On Thu, Jun 22, 2017 at 05:58:44PM +0800, Yadan Fan wrote:
> 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 SLE12-SP2.
Upstream doesn't care too much about SLES. 

> References: bsc#1025461

and our internal Bugzilla IDs


How about:
The hpsa firmware will bypass the cache for any requests larger than 1MB, so
we shoould cap the request size to avoid any performance regressions in
kernels later than 4.3 

The same applies for Patch 2/2

-- 
Johannes Thumshirn                                          Storage
jthumshirn@suse.de                                +49 911 74053 689
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#1673415

Hi Johannes,


On 2017年06月22日 18:06, Johannes Thumshirn wrote:
> On Thu, Jun 22, 2017 at 05:58:44PM +0800, Yadan Fan wrote:
>> 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 SLE12-SP2.
> Upstream doesn't care too much about SLES.
>
>> References: bsc#1025461
> and our internal Bugzilla IDs
>
>
> How about:
> The hpsa firmware will bypass the cache for any requests larger than 1MB, so
> we shoould cap the request size to avoid any performance regressions in
> kernels later than 4.3
>
> The same applies for Patch 2/2

Yes, I agree so, I will resend the modified patches.

Thanks,
Yadan

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