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: <1392650807.24974.12.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 17 Feb 2014 07:26:47 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Thomas Glanzmann <thomas@...nzmann.de>
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]

On Mon, 2014-02-17 at 15:08 +0100, Thomas Glanzmann wrote:
> Hello Eric,
> may submit your latest patch for upstream? Or do you plan on doing that
> yourself?

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

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

Then later we might take care of the page themselves.


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