lkml.org 
[lkml]   [2005]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: userspace block driver?
Jens Axboe wrote:
> On Wed, Nov 09 2005, Jeff Garzik wrote:
>
>>Neil Brown wrote:
>>
>>>On Wednesday November 9, jgarzik@pobox.com wrote:
>>>
>>>
>>>>Has anybody put any thought towards how a userspace block driver
>>>>would work?
>>>
>>>
>>>Isn't this was enbd does?
>>> http://www.it.uc3m.es/~ptb/nbd/
>>
>>Is there something there relevant for modern kernels? I would sure hope
>>I could come up with something more lightweight than that.
>
>
> I was going to say drbd, but then you did say more lightweight :-)
>
> Is nbd completely screwed these days?

nbd does more than I want.

_All_ that is needed is flipping requests <somehow> to/from userspace.
nbd messes directly with sockets and such, which I don't want. It does
way too much, hardcodes way too much.

loop is a closer model to a generic userspace block device than nbd, I
think.

Though, answering your question directly, I do get the impression that
in-kernel nbd has been left behind in favor of drbd and enbd, out in the
few places where nbd-ish solutions are used.

Jeff



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-11-09 09:04    [W:1.027 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site