linux-kernel - Re: page fault scalability (ext3, ext4, xfs)

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Message-ID: <20130815022401.GQ23412@tassilo.jf.intel.com>
Date:	Wed, 14 Aug 2013 19:24:01 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Dave Chinner <david@...morbit.com>
Cc:	Dave Hansen <dave.hansen@...ux.intel.com>,
	linux-fsdevel@...r.kernel.org, xfs@....sgi.com,
	linux-ext4@...r.kernel.org, Jan Kara <jack@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Andy Lutomirski <luto@...capital.net>
Subject: Re: page fault scalability (ext3, ext4, xfs)

> And FWIW, it's no secret that XFS has more per-operation overhead
> than ext4 through the write path when it comes to allocation, so
> it's no surprise that on a workload that is highly dependent on
> allocation overhead that ext4 is a bit faster....

This cannot explain a worse scaling curve though?

w-i-s is all about scaling.

-Andi
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