[Qemu-devel] Re: [PATCH] Add cache=volatile parameter to -drive

[Anthony Liguori]

On 05/17/2010 08:02 AM, Alexander Graf wrote:
> > My concern is that ext3 exaggerates the cost of fsync() which will result in 
> > diminishing value over time for this feature as people move to ext4/btrfs.
> >      
> There will be ext3 file systems for years out. Just because people can use 
> better and faster file systems doesn't mean they do. And I'm sure they can't 
> always choose. If anything, I can try and see what the numbers look like for 
> xfs.
>    

But ext3 with barrier=1 is pretty uncommon in practice.  Another data 
point would be an ext3 host file system with barrier=0.

Regards,

Anthony Liguori

> Alex
>
>