Re: [RFC][PATCH] libata: enable SATA disk fua detection on default

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Wed, May 09, 2012 at 08:48:04PM +0800, Zheng Liu wrote:
> Thanks for your explanation.  It seems that there still has a problem.
> If I set the disk to write through mode, I need to modify my application
> to remove all of flush/sync operations.  It is unacceptable for us.

You don't have to - the kernel will not send a SYNCHRONIZE CACHE command
unless the disk advertises a write back cache.

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