linux-kernel - Re: [fuse-devel] ionice and FUSE-based filesystems?

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Message-Id: <5BC8670C-E7B0-4827-BB74-B96AF327CF1D@rudd-o.com>
Date:	Fri, 3 Sep 2010 10:38:20 -0700
From:	"Manuel Amador (Rudd-O)" <rudd-o@...d-o.com>
To:	Chris Friesen <chris.friesen@...band.com>
Cc:	"fuse-devel@...ts.sourceforge.net" <fuse-devel@...ts.sourceforge.net>,
	"axboe@...nel.dk" <axboe@...nel.dk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [fuse-devel] ionice and FUSE-based filesystems?

I also wanna know this!!

         Manuel Amador (Rudd-O)
         Cloud.com, Inc. -- http://www.cloud.com

On Sep 2, 2010, at 13:37, Chris Friesen <chris.friesen@...band.com>  
wrote:

>
> I'm curious about the limits of using ionice with multiple layers of
> filesystems and devices.
>
> In particular, we have a scenario with a FUSE-based filesystem running
> on top of xfs on top of LVM, on top of software RAID, on top of  
> spinning
> disks.  (Something like that, anyways.)  The IO scheduler is CFQ.
>
> In the above scenario would you expect the IO nice value of the writes
> done by a task to be propagated all the way down to the disk  
> writes?  Or
> would they get stripped off at some point?
>
> Thanks,
> Chris
>
> -- 
> Chris Friesen
> Software Developer
> GENBAND
> chris.friesen@...band.com
> www.genband.com
>
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