Re: [PATCH 1/7] block: Add block_flush_device()

[Mark Lord]

Eric Sandeen wrote:
> Mark Lord wrote:
..
> > XFS appears to have something along those lines.
> > I believe it tries to disable the drive write caches
> > if it discovers that it cannot do cache flushes.
>
> No, it just stops issuing barriers if the initial mount-time test finds
> that they're not supported.  ext3/4/reiserfs do similar.
..

Okay.  My apologies to the XFS folks!

I'll have to dig deeper to find out who/what is disabling
the drive write caches, then.

Thanks
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