linux-kernel - Re: REGRESSION f54b311142a92ea2e42598e347b84e1655caf8e3 tcp auto corking slows down iSCSI file system creation by factor of 70 [WAS: 4 TB VMFS creation takes 15 minutes vs 26 seconds]

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Message-ID: <20140217153213.GA12054@glanzmann.de>
Date:	Mon, 17 Feb 2014 16:32:13 +0100
From:	Thomas Glanzmann <thomas@...nzmann.de>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	John Ogness <john.ogness@...utronix.de>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	target-devel <target-devel@...r.kernel.org>,
	Linux Network Development <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: REGRESSION f54b311142a92ea2e42598e347b84e1655caf8e3 tcp auto
 corking slows down iSCSI file system creation by factor of 70 [WAS: 4 TB
 VMFS creation takes 15 minutes vs 26 seconds]

Hello Eric,

> Unfortunately you did not had good results with the MSG_MORE applied
> to the page fragments.

I agree. We should submit only the submit the patch from this message:

Message-ID: <1391886759.10160.114.camel@...mazet-glaptop2.roam.corp.google.com>
http://mid.gmane.org/1391886759.10160.114.camel@edumazet-glaptop2.roam.corp.google.com

> I think I'll submit the part only dealing with the metadata.

May I submit the patch or do you want to do it yourself?

Cheers,
        Thomas
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