linux-kernel - Re: [Scst-devel] [ANNOUNCE]: Comparison of features sets between different SCSI targets (SCST, STGT, IET, LIO)

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Message-ID: <49E4D17E.8020602@vlnb.net>
Date:	Tue, 14 Apr 2009 22:10:06 +0400
From:	Vladislav Bolkhovitin <vst@...b.net>
To:	Tomasz Chmielewski <mangoo@...g.org>
CC:	Bart Van Assche <bart.vanassche@...il.com>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	scst-devel <scst-devel@...ts.sourceforge.net>,
	stgt@...r.kernel.org
Subject: Re: [Scst-devel] [ANNOUNCE]: Comparison of features sets between
 	different SCSI targets (SCST, STGT, IET, LIO)


Tomasz Chmielewski, on 04/14/2009 03:07 PM wrote:
> Vladislav Bolkhovitin schrieb:
> 
>>> Could anyone recheck if it's the same on some other system?
>>>
>>>> Which IO scheduler on the target did you use? I guess, deadline? If 
>>>> so, you should try with CFQ as well.
>>> I used CFQ.
>> You didn't apply io_context-XXX.patch, correct? With it you should see a 
>>  noticeable increase, like in http://scst.sourceforge.net/vl_res.txt.
> 
> I didn't apply this one.
> 
> I used 2.6.26.x kernel and io_context-XXX.patch was for 2.6.27, 2.6.28 
> and 2.6.29 only; 2.6.27 fails to apply to 2.6.26.8 kernel (perhaps in a 
> trivial way, I didn't check).

Yes, io_context patch for 2.6.26.x kernels doesn't exist, because it 
isn't clear if it has the necessary functionality.

But it's worth for you to upgrade to 2.6.27.x. Have you seen 
http://scst.sourceforge.net/vl_res.txt?

Vlad
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