All of lore.kernel.org
 help / color / mirror / Atom feed
From: Sagi Grimberg <sagig-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
To: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
	Jason Gunthorpe
	<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
Cc: Liran Liss <liss.liran-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Liran Liss <liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH 10/11] IB: only keep a single key in struct ib_mr
Date: Wed, 6 Jan 2016 17:10:06 +0200	[thread overview]
Message-ID: <568D2E4E.5020806@dev.mellanox.co.il> (raw)
In-Reply-To: <20160106060806.GA16509-jcswGhMUV9g@public.gmane.org>


>>> ULPs are *already* using the same registrations for both local and
>>> remote access.
>>
>> Where? Out of tree?
>
> I haven't found anything in-tree for sure.

We have that in iSER.

iSCSI allows a FirstBurst functionality and iSER as an iSCSI
transport is required to support that.

The FirstBurst is divided into ImmediateData which comes with
the SCSI cdb and followed by UnsolicitedDataOut commands. This
depends in the target support negotiation in the iSCSI login.

So basically say we have a 128k write,
the first IMMEDIATEDATA_SIZE (in LIO 8k) will come in the first
send with the SCSI cdb, and the next UNSOLICITED_DATA_OUT_SIZE (in
LIO 56k completing to 64K first burst) will follow by several
uncolicited dataout commands and the remaining 128k will be rdma_read
by the target.

So this is why iSER registers the entire SG list and then just work with
virtual offsets in the memory region.
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

  parent reply	other threads:[~2016-01-06 15:10 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-22 17:46 memory registration updates Christoph Hellwig
     [not found] ` <1448214409-7729-1-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-22 17:46   ` [PATCH 01/11] IB: start documenting device capabilities Christoph Hellwig
2015-11-22 17:46   ` [PATCH 02/11] IB: remove ib_query_mr Christoph Hellwig
2015-11-22 17:46   ` [PATCH 03/11] IB: remove support for phys MRs Christoph Hellwig
     [not found]     ` <1448214409-7729-4-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-24 12:01       ` Devesh Sharma
2015-11-22 17:46   ` [PATCH 04/11] IB: remove in-kernel support for memory windows Christoph Hellwig
2015-11-22 17:46   ` [PATCH 05/11] cxgb3: simplify iwch_get_dma_wr Christoph Hellwig
2015-11-22 17:46   ` [PATCH 06/11] nes: simplify nes_reg_phys_mr calling conventions Christoph Hellwig
2015-11-22 17:46   ` [PATCH 07/11] amso1100: fold c2_reg_phys_mr into c2_get_dma_mr Christoph Hellwig
2015-11-22 17:46   ` [PATCH 08/11] ehca: stop using struct ib_phys_buf Christoph Hellwig
2015-11-22 17:46   ` [PATCH 09/11] IB: remove the struct ib_phys_buf definition Christoph Hellwig
2015-11-22 17:46   ` [PATCH 10/11] IB: only keep a single key in struct ib_mr Christoph Hellwig
     [not found]     ` <1448214409-7729-11-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-23 19:41       ` Jason Gunthorpe
     [not found]         ` <20151123194124.GF32085-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-11-23 19:48           ` Christoph Hellwig
2015-12-22  9:17       ` Sagi Grimberg
     [not found]         ` <56791542.6020604-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-12-22 13:13           ` Christoph Hellwig
     [not found]             ` <20151222131326.GA25267-jcswGhMUV9g@public.gmane.org>
2015-12-22 13:50               ` Sagi Grimberg
     [not found]                 ` <56795514.9090704-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-12-22 13:59                   ` Christoph Hellwig
     [not found]                     ` <20151222135927.GA26311-jcswGhMUV9g@public.gmane.org>
2015-12-22 16:58                       ` Sagi Grimberg
     [not found]                         ` <56798126.9000003-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-12-22 21:09                           ` Jason Gunthorpe
     [not found]                             ` <7sikrilf3ik3fjsgppqxh9gn.1451043246057@email.android.com>
     [not found]                               ` <CAMHdiBDv9mScD+5o90OQ_tmAKw9o48_jfao6W+EBOZkUg+wReA@mail.gmail.com>
     [not found]                                 ` <CAMHdiBDv9mScD+5o90OQ_tmAKw9o48_jfao6W+EBOZkUg+wReA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-25 16:46                                   ` Liran Liss
     [not found]                                     ` <CAMHdiBC75n+u9BSMsKxJwcaBnGL68_3UBeQQtHp_CD5KGcUTnQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-01-05 17:46                                       ` Jason Gunthorpe
     [not found]                                         ` <20160105174636.GD16269-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-01-06  6:08                                           ` Christoph Hellwig
     [not found]                                             ` <20160106060806.GA16509-jcswGhMUV9g@public.gmane.org>
2016-01-06 15:10                                               ` Sagi Grimberg [this message]
     [not found]                                                 ` <568D2E4E.5020806-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2016-01-06 16:59                                                   ` Jason Gunthorpe
2015-11-22 17:46   ` [PATCH 11/11] IB: provide better access flags for fast registrations Christoph Hellwig
     [not found]     ` <1448214409-7729-12-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-23 15:09       ` Chuck Lever
     [not found]         ` <EE465F12-A5F6-4C95-A77C-199DFF8F77BD-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-11-23 15:49           ` Christoph Hellwig
2015-11-23 18:58       ` Jason Gunthorpe
     [not found]         ` <20151123185829.GE32085-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-11-23 19:44           ` Christoph Hellwig
2015-11-23  9:03   ` memory registration updates Sagi Grimberg
     [not found]     ` <5652D66E.5070600-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-11-23 14:16       ` Christoph Hellwig
     [not found]         ` <20151123141650.GA11116-jcswGhMUV9g@public.gmane.org>
2015-11-23 15:17           ` Sagi Grimberg
     [not found]             ` <56532E0A.20907-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-11-23 19:43               ` Christoph Hellwig
2015-11-23 15:06   ` Steve Wise

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=568D2E4E.5020806@dev.mellanox.co.il \
    --to=sagig-ldsdmyg8hgv8yrgs2mwiifqbs+8scbdb@public.gmane.org \
    --cc=dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
    --cc=hch-jcswGhMUV9g@public.gmane.org \
    --cc=jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org \
    --cc=linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org \
    --cc=liss.liran-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.