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From: Cyril Hrubis <chrubis@suse.cz>
To: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
Cc: ltp-list@lists.sourceforge.net, jy_zhangjin@cn.fujitsu.com
Subject: Re: [LTP] [PATCH v4 2/2] commands/df: Added new testcase to test df(1) command.
Date: Mon, 8 Jun 2015 15:57:05 +0200	[thread overview]
Message-ID: <20150608135705.GA15332@rei.suse.de> (raw)
In-Reply-To: <1433754901.2651.50.camel@G08FNSTD140232.g08.fujitsu.local>

Hi!
> > I don't get why we multiply the numbers, substract them and then divide
> > them again. Can't we just substract them?
> 
> This is for the conversion of measurement units.
> For example:
> We may get the output from 'df', 172k as subtrahend and 11M as minuend.
> If we want to do subtract. We should convert them to the same unit
> first.

Does that actually happen?

Looking at the code the sub() is called from df_verify() that calls df
always with exactly same parameters twice so we always end up with
matching units or am I mistaken?

> > Also does this work for other filesystems than ext2? It may be a good
> > idea to run the test for a few more filesystems as well. We may add a
> > parameter which fs to use and add entries as:
> > 
> 
> Hmm, this is a good idea.
> Nowadays, I am thinking about ext3 and ext4, but I know very few about
> other filesystems. Are you OK that I send you the new patches about
> them(ext2, ext3 and ext4)?

Sounds as a good start. If you add an parameter to specify fs to test we
can easily extend it for any other fs as well later on.

-- 
Cyril Hrubis
chrubis@suse.cz

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  parent reply	other threads:[~2015-06-08 13:58 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-28 11:10 [LTP] [PATCH] commands/df: Added new testcase to test df(1) command Zeng Linggang
2015-04-28 16:33 ` Cyril Hrubis
     [not found]   ` <1431596608-27065-1-git-send-email-zenglg.jy@cn.fujitsu.com>
2015-05-18 13:12     ` [LTP] [PATCH v2 1/2] test.sh: Add tst_acquire_device() and tst_release_device() Cyril Hrubis
     [not found]       ` <1432264251-27223-1-git-send-email-zenglg.jy@cn.fujitsu.com>
2015-05-27 14:40         ` [LTP] [PATCH v3 " Cyril Hrubis
     [not found]         ` <1432264251-27223-2-git-send-email-zenglg.jy@cn.fujitsu.com>
2015-05-27 14:53           ` [LTP] [PATCH v3 2/2] commands/df: Added new testcase to test df(1) command Cyril Hrubis
     [not found]             ` <1432809128.11403.53.camel@G08FNSTD140232>
2015-05-28 10:41               ` Cyril Hrubis
     [not found]                 ` <1433151743-30219-1-git-send-email-zenglg.jy@cn.fujitsu.com>
     [not found]                   ` <1433151743-30219-2-git-send-email-zenglg.jy@cn.fujitsu.com>
2015-06-03 14:27                     ` [LTP] [PATCH v4 " Cyril Hrubis
     [not found]                       ` <1433754901.2651.50.camel@G08FNSTD140232.g08.fujitsu.local>
2015-06-08 13:57                         ` Cyril Hrubis [this message]
     [not found]                           ` <1434095739-19883-1-git-send-email-zenglg.jy@cn.fujitsu.com>
     [not found]                             ` <1434095739-19883-2-git-send-email-zenglg.jy@cn.fujitsu.com>
2015-06-16 19:51                               ` [LTP] [PATCH v5 " Cyril Hrubis

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