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

[Jeff Garzik]

Mark Lord wrote:
> Jens Axboe wrote:
> > My point is that some file systems may or may not have different paths
> > or optimizations depending on whether barriers are enabled and working
> > or not. Apparently that's just reiserfs and Chris says we can remove it,
> > so it is probably a moot point.

> 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.

Perhaps; but speaking specifically about blkdev_issue_flush() --

nobody checks its return value at the present time.

	Jeff



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