linux-kernel - Re: [LTP] [linus:master] [f2fs] 9f0f6bf427: ltp.ADSP069.fail

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Message-ID: <ZuL6uRAuIhAFTfJe@yuki.lan>
Date: Thu, 12 Sep 2024 16:29:13 +0200
From: Cyril Hrubis <chrubis@...e.cz>
To: kernel test robot <oliver.sang@...el.com>
Cc: Chao Yu <chao@...nel.org>, lkp@...el.com, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net, oe-lkp@...ts.linux.dev,
	Jaegeuk Kim <jaegeuk@...nel.org>, ltp@...ts.linux.it
Subject: Re: [LTP] [linus:master] [f2fs]  9f0f6bf427:  ltp.ADSP069.fail

Hi!
So what the test does is:

- creates a sparse file (truncates an empty file to non-zero size)
- starts N child processes that open the file and read it in chunks
  while they expect zeros to be read
- starts a single writer child that opens the file with O_DIRECT
  and writes zeros to the file starting at some offset

And if the test fails it means that at some point one of the reader
children have seen inconsistent state.

-- 
Cyril Hrubis
chrubis@...e.cz