linux-ext4 - Re: "New" ext4 features tests in LTP

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Date:   Thu, 24 Oct 2019 10:37:15 +0200
From:   Petr Vorel <pvorel@...e.cz>
To:     Jan Kara <jack@...e.cz>, "Theodore Y. Ts'o" <tytso@....edu>,
        Yong Sun <yosun@...e.com>
Cc:     Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Cyril Hrubis <chrubis@...e.cz>
Subject: Re: "New" ext4 features tests in LTP

Hi Ted, Jan,

> Yeah, I believe this may be useful to implement in fstests in some fs
> agnostic way.
Thank you both for reviewing LTP tests.

> > > ext4-nsec-timestamps [6]
> > > --------------------
> > > Directory containing the shell script which is used to test nanosec timestamps
> > > of ext4.

> > This basically tests that the file system supports nanosecond
> > timestamps, with a 0.3% false positive failure rate.   Again, why?

> > > ext4-subdir-limit [9]
> > > -----------------
> > > Directory containing the shell script which is used to test subdirectory limit
> > > of ext4. According to the kernel documentation, we create more than 32000
> > > subdirectorys on the ext4 filesystem.

> > This is a valid test, although it's not what I would call a "high
> > value" test.  (As in, it's testing maybe a total of four simple lines
> > of code that are highly unlikely to fail.)

> These two may be IMHO worth carrying over to fstests in some form. The other
> tests seem either already present in various fstests configs we run or
> pointless as Ted wrote.
As Sero already volunteered to contribute them to fstests (thanks Sero!),
I'll send a patch to delete them from LTP.

> 								Honza

Kind regards,
Petr