From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: buildroot@busybox.net
Subject: [Buildroot] Genimage last partition size issue
Date: Thu, 26 May 2016 21:59:29 +0200 [thread overview]
Message-ID: <20160526215929.61993c8f@free-electrons.com> (raw)
In-Reply-To: <87bn3s61en.fsf@dell.be.48ers.dk>
Hello,
On Thu, 26 May 2016 21:54:08 +0200, Peter Korsgaard wrote:
> Can dd detect and do something sensible about sparse files? I thought it
> was only able to create sparse files (by seeking)? I would guess you
> need a tool that understand the filesystem to know if you can really
> skip sequences of zeros when writing.
man dd(1):
sparse try to seek rather than write the output for NUL input blocks
So it doesn't seem to need a sparse file, it's just that it detects
blocks that are completely zero and does not write them.
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
next prev parent reply other threads:[~2016-05-26 19:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-24 15:26 [Buildroot] Genimage last partition size issue Matthew Weber
2016-05-24 15:56 ` Peter Korsgaard
2016-05-26 17:42 ` Matthew Weber
2016-05-26 17:49 ` Gustavo Zacarias
2016-05-26 18:35 ` Thomas Petazzoni
2016-05-26 18:37 ` Gustavo Zacarias
2016-05-26 18:41 ` Thomas Petazzoni
2016-05-26 18:45 ` Gustavo Zacarias
2016-05-26 19:18 ` Thomas Petazzoni
2016-05-26 19:19 ` Gustavo Zacarias
2016-05-26 19:55 ` Peter Korsgaard
2016-05-26 19:54 ` Peter Korsgaard
2016-05-26 19:59 ` Thomas Petazzoni [this message]
2016-05-26 20:05 ` Peter Korsgaard
2016-05-26 21:08 ` Yann E. MORIN
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