linux-kernel - Re: [PATCH 3/3] xen/block: add multi-page ring support

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Message-ID: <558762C4.2000002@oracle.com>
Date:	Mon, 22 Jun 2015 09:20:04 +0800
From:	Bob Liu <bob.liu@...cle.com>
To:	Roger Pau Monné <roger.pau@...rix.com>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Paul Durrant <Paul.Durrant@...rix.com>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>,
	David Vrabel <david.vrabel@...rix.com>,
	"justing@...ctralogic.com" <justing@...ctralogic.com>,
	Julien Grall <julien.grall@...rix.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Marcus Granado <marcus.granado@...rix.com>,
	Rafal Mielniczuk <Rafal.Mielniczuk@...rix.com>
Subject: Re: [PATCH 3/3] xen/block: add multi-page ring support


On 06/09/2015 10:07 PM, Roger Pau Monné wrote:
> El 09/06/15 a les 15.39, Konrad Rzeszutek Wilk ha escrit:
...
>> Roger, I put them (patches) on devel/for-jens-4.2 on
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
>>
>> I think these two patches:
>> drivers: xen-blkback: delay pending_req allocation to connect_ring
>> xen/block: add multi-page ring support
>>
>> are the only ones that haven't been Acked by you (or maybe they
>> have and I missed the Ack?)
> 
> Hello,
> 
> I was waiting to Ack those because the XenServer storage performance
> folks found out that these patches cause a performance regression on
> some of their tests. I'm adding them to the conversation so they can
> provide more details about the issues they found, and whether we should
> hold pushing this patches or not.
> 

Hey,

Are there any updates? What's the performance regression problem?

Thanks,
-Bob
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