linux-ext4 - Re: [PATCH 4/4] e2fsck: regression tests for INCOMPAT

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Date:	Fri, 23 Sep 2011 17:51:57 -0600
From:	Andreas Dilger <adilger@...mcloud.com>
To:	Theodore Tso <tytso@....edu>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 4/4] e2fsck: regression tests for INCOMPAT_MMP feature

On 2011-09-23, at 5:38 PM, Andreas Dilger wrote:
> Add tests for the MMP feature - creating a filesystem with mke2fs
> and MMP enabled, enable/disable MMP with tune2fs, disabling the
> e2fsck MMP flag with tune2fs after a failed e2fsck, and e2fsck
> checking and fixing a corrupt MMP block.
> 
> The MMP tests need to be run from a real disk, not tmpfs, because
> tmpfs doesn't support O_DIRECT reads, which MMP uses to ensure
> that reads from the MMP block are not filled from the page cache.
> Using a local disk does not slow down the tests noticably, since
> they wait to detect if the MMP block is being modified.
> 
> Signed-off-by: Andreas Dilger <adilger@...mcloud.com>
> 
> #
> # ERROR: trailing whitespace
> # #19: FILE: tests/f_mmp/expect.1:13:
> # +Superblock backups stored on blocks: $
> #
> # ERROR: Invalid UTF-8, patch and commit message should be encoded in UTF-8
> # #22: FILE: tests/f_mmp/expect.1:16:
> # +Allocating group tables: 0/2...1/2...   ...done
> #                              ^

Sigh, my bad.  I installed an automatic git prepare_commit_msg hook that
runs checkpatch.pl against the patch, but it doesn't like the format of
the expect output (which is not C code and probably should be ignored).

Please delete this stuff out of the comments, or I can resubmit if you want.

Cheers, Andreas
--
Andreas Dilger 
Principal Engineer
Whamcloud, Inc.



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