Re: [PATCH 01/11] DIO: Separate fields only used in the submission path from struct dio

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To: Jeff Moyer <jmoyer@xxxxxxxxxx>
Subject: Re: [PATCH 01/11] DIO: Separate fields only used in the submission path from struct dio
From: Andi Kleen <andi@xxxxxxxxxxxxxx>
Date: Mon, 8 Aug 2011 21:43:00 +0200
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, hch@xxxxxxxxxxxxx, Andi Kleen <ak@xxxxxxxxxxxxxxx>
In-reply-to: <x497h6niy37.fsf@segfault.boston.devel.redhat.com>
User-agent: Mutt/1.4.2.2i

> The pages array is only used on submission.  Why did it land in the
> struct dio? 

It's too large for the stack.

-Andi
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Follow-Ups:
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References:
- Updated direct IO optimization patchkit v2
  - From: Andi Kleen
- [PATCH 01/11] DIO: Separate fields only used in the submission path from struct dio
  - From: Andi Kleen
- Re: [PATCH 01/11] DIO: Separate fields only used in the submission path from struct dio
  - From: Jeff Moyer

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