linux-ext4 - Re: ext3 default journal mode

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Message-ID: <4A648010.5070006@redhat.com>
Date:	Mon, 20 Jul 2009 10:32:48 -0400
From:	Ric Wheeler <rwheeler@...hat.com>
To:	Chris Mason <chris.mason@...cle.com>
CC:	Ric Wheeler <rwheeler@...hat.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Theodore Tso <tytso@....edu>,
	Valerie Aurora <vaurora@...hat.com>,
	"Stephen C. Tweedie" <sct@...hat.com>,
	Eric Sandeen <esandeen@...hat.com>,
	Andreas Dilger <adilger@....com>,
	Josef Bacik <jbacik@...hat.com>, Mingming Cao <cmm@...ibm.com>
Subject: Re: ext3 default journal mode

On 07/20/2009 10:18 AM, Chris Mason wrote:
> On Sun, Jul 19, 2009 at 10:50:49PM -0400, Ric Wheeler wrote:
>    
>> Now that we have put some some distance between us and the mega-thread, I
>> think that it is time to put some sanity back into the ext3 journal mode
>> options.
>>
>> My preference is to revert the default back to ordered mode or (if Chris
>> is ready) back to guarded mode.
>>      
>
> My plan was to get guarded into .30, but that clearly didn't happen.
> So, I'll resend this week and try to have it ready for .31, unless
> people would rather avoid the changes to the tried and true ext3.
>
> -chris
>    

I have been thinking that guarded mode might make for a full replacement 
for writeback mode over time - the more I think about writeback mode, 
the less I like letting casual users hurt themselves with it.

I would be very happy to see guarded mode get resent :-)

Any idea how many distros actually ship today with writeback mode as 
their default?

ric

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