linux-kernel - RE: [PATCH 9/9] [SCSI] mvsas: Add support for interrupt tasklet

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Message-ID: <F766E4F80769BD478052FB6533FA745D19FAF50016@SC-VEXCH4.marvell.com>
Date:	Thu, 30 Jun 2011 19:03:27 -0700
From:	Xiangliang Yu <yuxiangl@...vell.com>
To:	Dan Williams <dan.j.williams@...el.com>,
	"yxlraid@...il.com" <yxlraid@...il.com>
CC:	"JBottomley@...allels.com" <JBottomley@...allels.com>,
	"James.Bottomley@...e.de" <James.Bottomley@...e.de>,
	"jack_wang@...sh.com" <jack_wang@...sh.com>,
	"lucas.demarchi@...fusion.mobi" <lucas.demarchi@...fusion.mobi>,
	"maciej.trela@...el.com" <maciej.trela@...el.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jacky Feng <jfeng@...vell.com>
Subject: RE: [PATCH 9/9] [SCSI] mvsas: Add support for interrupt tasklet


>Subject: Re: [PATCH 9/9] [SCSI] mvsas: Add support for interrupt tasklet

>On Thu, Jun 30, 2011 at 7:27 AM,  <yxlraid@...il.com> wrote:
>> From: Xiangliang Yu <yuxiangl@...vell.com>
>>
>> -- Add support for interrupt tasklet, which will improve performance.

>Interesting, do you happen to have comparative performance numbers?
According to internal test, the increase of tasklet performance is about
1.5MB. This is first step, I will continue to enhance the performance.

>>
>>  ccflags-$(CONFIG_SCSI_MVSAS_DEBUG) := -DMV_DEBUG
>> +ccflags-$(CONFIG_SCSI_MVSAS_TASKLET) := -DMVS_USE_TASKLET

>Question, why not just use "#ifdef CONFIG_SCSI_MVSAS_TASKLET" and drop
>these redefinitions?
I think the Tasklet is a experimental feature, if any problem, the user
Can close the feature. 

Thanks!

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