linux-kernel - Re: xfs bug in 2.6.26-rc9

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Message-ID: <20080712050612.GA11334@Chamillionaire.breakpoint.cc>
Date:	Sat, 12 Jul 2008 07:06:12 +0200
From:	Sebastian Siewior <lkml@...breakpoint.cc>
To:	Dave Chinner <david@...morbit.com>
Cc:	Mikael Abrahamsson <swmike@....pp.se>,
	linux-kernel@...r.kernel.org, xfs@....sgi.com
Subject: Re: xfs bug in 2.6.26-rc9

* Dave Chinner | 2008-07-12 09:22:01 [+1000]:

>I effectively quoted from it:
>
>config XFS_DEBUG
>        bool "XFS Debugging support (EXPERIMENTAL)"
>        depends on XFS_FS && EXPERIMENTAL
>        help
>          Say Y here to get an XFS build with many debugging features,
>          including ASSERT checks, function wrappers around macros,
>          and extra sanity-checking functions in various code paths.
>
>          Note that the resulting code will be HUGE and SLOW, and probably
>          not useful unless you are debugging a particular problem.
>
>          Say N unless you are an XFS developer, or you play one on TV.
>
>> Debug mode is usually
>> noisy, little slower and mostly usefull just to the developers but *I*
>> would not expect to BUG() in the non-fatal case.
>
>What do you expect debug code to do? Asserts are designed to
>drop the machine into a debugger when they fail so the problem can
>be, well, debugged.
Sorry, I haven't read this. Userspace assert() results in abort() so it
sane to bug() in kernel.

>Dave.
Sebastian
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