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Re: [PATCH 03/60] xfs: plug directory buffer readahead

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: [PATCH 03/60] xfs: plug directory buffer readahead
From: Mark Tinguely <tinguely@xxxxxxx>
Date: Thu, 20 Jun 2013 13:45:18 -0500
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1371617468-32559-4-git-send-email-david@xxxxxxxxxxxxx>
References: <1371617468-32559-1-git-send-email-david@xxxxxxxxxxxxx> <1371617468-32559-4-git-send-email-david@xxxxxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:9.0) Gecko/20120122 Thunderbird/9.0
On 06/18/13 23:50, Dave Chinner wrote:
From: Dave Chinner<dchinner@xxxxxxxxxx>

Similar to bulkstat inode chunk readahead, we need to plug directory
data buffer readahead during getdents to ensure that we can merge
adjacent readahead requests and sort out of order requests optimally
before they are dispatched. This improves the readahead efficiency
and reduces the IO load it generates as the IO patterns are
significantly better for both contiguous and fragmented directories.

Signed-off-by: Dave Chinner<dchinner@xxxxxxxxxx>
---

Looks good.

Reviewed-by: Mark Tinguely <tinguely@xxxxxxx>

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