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From: Kent Overstreet <kmo@daterainc.com>
To: Rolf Fokkens <rolf@rolffokkens.nl>
Cc: Slava Pestov <sp@datera.io>,
	"Stephen R. van den Berg" <srb@cuci.nl>,
	linux-bcache@vger.kernel.org
Subject: Re: 3.18.1 + latest bcache-dev
Date: Sat, 3 Jan 2015 16:46:21 -0800	[thread overview]
Message-ID: <20150104004621.GA4460@kmo-pixel> (raw)
In-Reply-To: <54A81B78.2070409@rolffokkens.nl>

On Sat, Jan 03, 2015 at 05:40:24PM +0100, Rolf Fokkens wrote:
> Hi Slava,
> 
> Sounds like the kernel (using bcache-dev) is not able to handle the current
> format. If so, bcache-tools may help in "reformatting" bcache devices, but
> that's no solution for existing systems.
> 
> So is my understanding correct that there's no easy kernel upgrade path (to
> bcache-dev) ?

Yes, correct. The on disk format changes in bcache-dev are just too deep to
feasibly write backwards compat code, unfortunately.

And the on disk format is still in flux - for just a bit longer hopefully
though, right now I'm working on a pretty major revamp that's getting close to
done (self describing and packed metadata). This revamp is making the on disk
format _much_ more flexible though, and cleaning up a lot of stuff at the same
time.

  reply	other threads:[~2015-01-04  0:43 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-28  2:35 Stephen R. van den Berg
2014-12-29  4:05 ` Slava Pestov
2015-01-03 16:40   ` Rolf Fokkens
2015-01-04  0:46     ` Kent Overstreet [this message]
2015-01-04 14:11       ` Rolf Fokkens
2015-01-05  7:47         ` Slava Pestov
2015-01-06 22:18           ` Rolf Fokkens
2015-01-06 22:47             ` Slava Pestov
2015-01-07  1:48             ` Kent Overstreet
2015-01-07 17:41               ` Jianjian Huo
2015-01-08  2:29                 ` Kent Overstreet
2015-01-07 20:17             ` Eric Wheeler
2015-01-08  2:30               ` Kent Overstreet
2015-01-08 19:47                 ` Rolf Fokkens
2015-01-05  8:49       ` Stephen R. van den Berg
2015-01-05 11:06         ` Kent Overstreet
2015-01-06  9:16           ` Stephen R. van den Berg
2015-01-06 11:10             ` Kent Overstreet

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