Message-ID: <494A99EF.6070400@flurg.com>
Date: Thu, 18 Dec 2008 12:43:59 -0600
From: "David M. Lloyd" <dmlloyd@flurg.com>
User-Agent: Thunderbird 2.0.0.18 (X11/20081119)
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To: Vladislav Bolkhovitin <vst@vlnb.net>
Cc: linux-mm@kvack.org, Christoph Hellwig <hch@infradead.org>,
        James Bottomley <James.Bottomley@HansenPartnership.com>,
        linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
        scst-devel@lists.sourceforge.net,
        Bart Van Assche <bart.vanassche@gmail.com>, netdev@vger.kernel.org
Subject: Re: [RFC]: Support for zero-copy TCP transmit of user space data
References: <494009D7.4020602@vlnb.net> <494012C4.7090304@vlnb.net> <20081210214500.GA24212@ioremap.net> <4941590F.3070705@vlnb.net> <1229022734.3266.67.camel@localhost.localdomain> <4942BAB8.4050007@vlnb.net> <1229110673.3262.94.camel@localhost.localdomain> <49469ADB.6010709@vlnb.net> <20081215231801.GA27168@infradead.org> <4947FA1C.2090509@vlnb.net> <494A97DD.7080503@vlnb.net>
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On 12/18/2008 12:35 PM, Vladislav Bolkhovitin wrote:
> An iSCSI target driver iSCSI-SCST was a part of the patchset 
> (http://lkml.org/lkml/2008/12/10/293). For it a nice optimization to 
> have TCP zero-copy transmit of user space data was implemented. Patch, 
> implementing this optimization was also sent in the patchset, see 
> http://lkml.org/lkml/2008/12/10/296.

I'm probably ignorant of about 90% of the context here, but isn't this the 
sort of problem that was supposed to have been solved by vmsplice(2)?

- DML

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