From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "James.Bottomley@HansenPartnership.com" , "tytso@mit.edu" , "willy@infradead.org" Date: Tue, 16 Jan 2018 23:57:45 +0000 Message-ID: <1516147064.2844.66.camel@wdc.com> References: <20180116145240.GD30073@bombadil.infradead.org> <20180116232335.GM8249@thunk.org> <1516145316.14734.11.camel@HansenPartnership.com> In-Reply-To: <1516145316.14734.11.camel@HansenPartnership.com> MIME-Version: 1.0 Cc: "linux-block@vger.kernel.org" , "linux-mm@kvack.org" , "lsf-pc@lists.linux-foundation.org" , "linux-fsdevel@vger.kernel.org" , "linux-scsi@vger.kernel.org" Subject: Re: [Lsf-pc] [LSF/MM TOPIC] A high-performance userspace block driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Sender: lsf-pc-bounces@lists.linux-foundation.org Errors-To: lsf-pc-bounces@lists.linux-foundation.org List-ID: On Tue, 2018-01-16 at 15:28 -0800, James Bottomley wrote: > On Tue, 2018-01-16 at 18:23 -0500, Theodore Ts'o wrote: > > On Tue, Jan 16, 2018 at 06:52:40AM -0800, Matthew Wilcox wrote: > > > > > > > > > I see the improvements that Facebook have been making to the nbd > > > driver, and I think that's a wonderful thing. Maybe the outcome of > > > this topic is simply: "Shut up, Matthew, this is good enough". > > > > > > It's clear that there's an appetite for userspace block devices; > > > not for swap devices or the root device, but for accessing data > > > that's stored in that silo over there, and I really don't want to > > > bring that entire mess of CORBA / Go / Rust / whatever into the > > > kernel to get to it, but it would be really handy to present it as > > > a block device. > > > > ... and using iSCSI was too painful and heavyweight. > > From what I've seen a reasonable number of storage over IP cloud > implementations are actually using AoE. The argument goes that the > protocol is about ideal (at least as compared to iSCSI or FCoE) and the > company behind it doesn't seem to want to add any more features that > would bloat it. Has anyone already looked into iSER, SRP or NVMeOF over rdma_rxe over the loopback network driver? I think all three driver stacks support zero-copy receiving, something that is not possible with iSCSI/TCP nor with AoE. Bart. _______________________________________________ Lsf-pc mailing list Lsf-pc@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/lsf-pc From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: [Lsf-pc] [LSF/MM TOPIC] A high-performance userspace block driver Date: Tue, 16 Jan 2018 23:57:45 +0000 Message-ID: <1516147064.2844.66.camel@wdc.com> References: <20180116145240.GD30073@bombadil.infradead.org> <20180116232335.GM8249@thunk.org> <1516145316.14734.11.camel@HansenPartnership.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1516145316.14734.11.camel@HansenPartnership.com> Content-Language: en-US Content-ID: Sender: owner-linux-mm@kvack.org To: "James.Bottomley@HansenPartnership.com" , "tytso@mit.edu" , "willy@infradead.org" Cc: "linux-scsi@vger.kernel.org" , "linux-mm@kvack.org" , "linux-block@vger.kernel.org" , "lsf-pc@lists.linux-foundation.org" , "linux-fsdevel@vger.kernel.org" List-Id: linux-scsi@vger.kernel.org T24gVHVlLCAyMDE4LTAxLTE2IGF0IDE1OjI4IC0wODAwLCBKYW1lcyBCb3R0b21sZXkgd3JvdGU6 DQo+IE9uIFR1ZSwgMjAxOC0wMS0xNiBhdCAxODoyMyAtMDUwMCwgVGhlb2RvcmUgVHMnbyB3cm90 ZToNCj4gPiBPbiBUdWUsIEphbiAxNiwgMjAxOCBhdCAwNjo1Mjo0MEFNIC0wODAwLCBNYXR0aGV3 IFdpbGNveCB3cm90ZToNCj4gPiA+IA0KPiA+ID4gDQo+ID4gPiBJIHNlZSB0aGUgaW1wcm92ZW1l bnRzIHRoYXQgRmFjZWJvb2sgaGF2ZSBiZWVuIG1ha2luZyB0byB0aGUgbmJkDQo+ID4gPiBkcml2 ZXIsIGFuZCBJIHRoaW5rIHRoYXQncyBhIHdvbmRlcmZ1bCB0aGluZy4gIE1heWJlIHRoZSBvdXRj b21lIG9mDQo+ID4gPiB0aGlzIHRvcGljIGlzIHNpbXBseTogIlNodXQgdXAsIE1hdHRoZXcsIHRo aXMgaXMgZ29vZCBlbm91Z2giLg0KPiA+ID4gDQo+ID4gPiBJdCdzIGNsZWFyIHRoYXQgdGhlcmUn cyBhbiBhcHBldGl0ZSBmb3IgdXNlcnNwYWNlIGJsb2NrIGRldmljZXM7DQo+ID4gPiBub3QgZm9y IHN3YXAgZGV2aWNlcyBvciB0aGUgcm9vdCBkZXZpY2UsIGJ1dCBmb3IgYWNjZXNzaW5nIGRhdGEN Cj4gPiA+IHRoYXQncyBzdG9yZWQgaW4gdGhhdCBzaWxvIG92ZXIgdGhlcmUsIGFuZCBJIHJlYWxs eSBkb24ndCB3YW50IHRvDQo+ID4gPiBicmluZyB0aGF0IGVudGlyZSBtZXNzIG9mIENPUkJBIC8g R28gLyBSdXN0IC8gd2hhdGV2ZXIgaW50byB0aGUNCj4gPiA+IGtlcm5lbCB0byBnZXQgdG8gaXQs IGJ1dCBpdCB3b3VsZCBiZSByZWFsbHkgaGFuZHkgdG8gcHJlc2VudCBpdCBhcw0KPiA+ID4gYSBi bG9jayBkZXZpY2UuDQo+ID4gDQo+ID4gLi4uIGFuZCB1c2luZyBpU0NTSSB3YXMgdG9vIHBhaW5m dWwgYW5kIGhlYXZ5d2VpZ2h0Lg0KPiANCj4gRnJvbSB3aGF0IEkndmUgc2VlbiBhIHJlYXNvbmFi bGUgbnVtYmVyIG9mIHN0b3JhZ2Ugb3ZlciBJUCBjbG91ZA0KPiBpbXBsZW1lbnRhdGlvbnMgYXJl IGFjdHVhbGx5IHVzaW5nIEFvRS4gIFRoZSBhcmd1bWVudCBnb2VzIHRoYXQgdGhlDQo+IHByb3Rv Y29sIGlzIGFib3V0IGlkZWFsIChhdCBsZWFzdCBhcyBjb21wYXJlZCB0byBpU0NTSSBvciBGQ29F KSBhbmQgdGhlDQo+IGNvbXBhbnkgYmVoaW5kIGl0IGRvZXNuJ3Qgc2VlbSB0byB3YW50IHRvIGFk ZCBhbnkgbW9yZSBmZWF0dXJlcyB0aGF0DQo+IHdvdWxkIGJsb2F0IGl0Lg0KDQpIYXMgYW55b25l IGFscmVhZHkgbG9va2VkIGludG8gaVNFUiwgU1JQIG9yIE5WTWVPRiBvdmVyIHJkbWFfcnhlIG92 ZXIgdGhlDQpsb29wYmFjayBuZXR3b3JrIGRyaXZlcj8gSSB0aGluayBhbGwgdGhyZWUgZHJpdmVy IHN0YWNrcyBzdXBwb3J0IHplcm8tY29weQ0KcmVjZWl2aW5nLCBzb21ldGhpbmcgdGhhdCBpcyBu b3QgcG9zc2libGUgd2l0aCBpU0NTSS9UQ1Agbm9yIHdpdGggQW9FLg0KDQpCYXJ0Lg== -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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