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From: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
To: Chris Worley <worleys-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	scst-devel
	<scst-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Subject: Re: Adjusting minimum packet size or "wait to merge requests" in SRP
Date: Wed, 28 Oct 2009 12:51:45 -0700	[thread overview]
Message-ID: <ada639zs3e6.fsf@cisco.com> (raw)
In-Reply-To: <f3177b9e0910281147u5a47f75ao8bbe156d5b04969c-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> (Chris Worley's message of "Wed, 28 Oct 2009 12:47:45 -0600")


 > It appears that SRP tries to coalesce and fragment initiator I/O
 > requests into 64KB packets, as that looks to be the size requested
 > to/from the device on the target side (and the I/O scheduler is
 > disabled on the target).

There is no code in the SRP initiator that does anything to change IO
requests that I know of.  So I think this is happening somewhere higher
in the stack.

 - R.
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  parent reply	other threads:[~2009-10-28 19:51 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-28 18:47 Adjusting minimum packet size or "wait to merge requests" in SRP Chris Worley
     [not found] ` <f3177b9e0910281147u5a47f75ao8bbe156d5b04969c-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-10-28 19:14   ` Bart Van Assche
     [not found]     ` <e2e108260910281214y5e3b5f4u24438986672e81b3-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-10-28 19:38       ` Chris Worley
     [not found]         ` <f3177b9e0910281238n1e53653eq3e667010caf8e745-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-10-28 19:58           ` David Dillow
     [not found]             ` <1256759902.3544.9.camel-FqX9LgGZnHWDB2HL1qBt2PIbXMQ5te18@public.gmane.org>
2009-10-28 20:25               ` Chris Worley
     [not found]                 ` <f3177b9e0910281325i5ef5ce86u758ed665329232f2-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-10-28 21:05                   ` David Dillow
2009-10-28 19:51   ` Roland Dreier [this message]
2009-10-29 18:30   ` [Scst-devel] " Vladislav Bolkhovitin

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