linux-ext4 - Re: [PATCH 0/6][64-bit] Overview

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Message-ID: <22617.1241192250@gamaville.dokosmarshall.org>
Date:	Fri, 01 May 2009 11:37:30 -0400
From:	Nick Dokos <nicholas.dokos@...com>
To:	Andreas Dilger <adilger@....com>
cc:	Nick Dokos <nick@...hp.com>, linux-ext4@...r.kernel.org,
	"Theodore Ts'o" <tytso@....edu>,
	Valerie Aurora <vaurora@...hat.com>
Subject: Re: [PATCH 0/6][64-bit] Overview 

Andreas Dilger <adilger@....com> wrote:

> Nick,
> sorry to be so slow getting back to you.  Attached are the relatively
> simple test programs we use to verify whether large block devices and
> large filesystems are suffering from block address aliasing.
> 
> The first tool (llverdev) will write either partial or fill data patterns
> to the disk, then read them back and verify the data is still correct.
> 
> The second tool (llverfs) will try to allocate directories spread across
> the filesystem (if possible, using EXT2_TOPDIR_FL) and then fill the
> filesystem partially or fully with a data pattern in ~1GB files and 
> then read them back for verification.
> 
> This isn't really a stress test, but rather just a sanity check for
> variable overflows at different levels of the IO stack.
> 

Andreas,

thanks very much! I'll do some runs over the weekend with them,
as well as some e2fsck runs w/blktrace (with and without lazy
itable init).

Thanks,
Nick

PS. BTW, I have problems receiving email right now - the Reply-to
address above seems to work but my "official" address in the From header
does not.
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