Date: Thu, 25 Aug 2011 16:15:23 -0400
From: Jim Rees <rees@umich.edu>
To: Boaz Harrosh <bharrosh@panasas.com>
Cc: Peng Tao <bergwolf@gmail.com>, "Isaman, Fred" <Fred.Isaman@netapp.com>,
        Andy Adamson <andros@netapp.com>,
        "Myklebust, Trond" <Trond.Myklebust@netapp.com>,
        Benny Halevy <bhalevy@tonian.com>, linux-nfs@vger.kernel.org,
        Peng Tao <peng_tao@emc.com>
Subject: Re: [PATCH] pnfsblock: init pg_bsize properly
Message-ID: <20110825201523.GA6901@merit.edu>
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Boaz Harrosh wrote:

  On 08/23/2011 08:01 AM, Peng Tao wrote:
  > So this is a generic issue. For file and object layout, do you need to
  > use partial read/write rpc ops in any case? For block layout, we would
  > like to never use it in LD. But I'm not sure about file and object
  > case. Could you confirm?
  > 
  
  For objects it is like blocks. NEVER (ever) use partial rpc ops. r/wsize
  are not relevant for obj-LD IO.
  
  (As I understand from Trond also with files the LD should inspect the
   situation and have the final disposition. But someone will need to write
   some files-LD code for that, Fred, Andy?)
  
  > Thanks,
  > Tao

We discussed this on the call today.  Boaz is going to write a brief
description of how to fix this in the generic layer, then I'm going to
implement it.