Re: Fwd: barriers off by default?

["Eric A" <erpo41@gmail.com>]

On Mon, May 12, 2008 at 1:00 PM, Eric Sandeen <sandeen@redhat.com> wrote:
> Eric A wrote:
>  >  Documentation/block/barrier.txt
>  >
>  >  There's a section that starts:
>  >
>  >  "* Error handling.  Currently, block layer will report error to upper
>  >  layer if any of requests in an ordered sequence fails.  Unfortunately,
>  >  this doesn't seem to be enough. "
>
>
>
> And ends:
>
>  "As the probability of this happening is very low and the drive should
>  be faulty, implementing the fix is probably an overkill.  But, still,
>  it's there."
>
>  I'm not sure it's an argument for disabling barriers in general.   :)

I agree; it's just something that's been bugging me since I started
searching for a solution for zfs-fuse. Maybe performance is the
reason? Flushing the write cache is kind of slow.

Cheers,
Eric