linux-kernel - Re: solid state drive access and context switching

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Message-ID: <6934efce0712041608w2e25587n6b2d738fa0265d9d@mail.gmail.com>
Date:	Tue, 4 Dec 2007 16:08:07 -0800
From:	"Jared Hulbert" <jaredeh@...il.com>
To:	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Cc:	"Chris Friesen" <cfriesen@...tel.com>, linux-kernel@...r.kernel.org
Subject: Re: solid state drive access and context switching

On Dec 4, 2007 3:24 PM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> > Right.  The trend is to hide the nastiness of NAND technology changes
> > behind controllers.  In general I think this is a good thing.
>
> You miss the point - any controller you hide it behind almost inevitably
> adds enough latency you don't want to use it synchronously.

I think I get it.  We keep saying that it's the latency is too high.
I agree that most technologies out there have latencies that are too
high.  Again I ask the question, what latencies do we have to hit
before the sync options become worth it?
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