Re: SuSE O_DIRECT|O_NONBLOCK overload

[Mike Christie]

On 03/12/2014 07:15 PM, NeilBrown wrote:
> I also think there should probably be just one FAILFAST flag.  Where it was
> the DEV or the TRANSPORT or the DRIVER that failed could be returned in the
> error code for any caller that cared.  But as I don't know why the one became
> three I could well be missing something important.

It was for multipath. The problem was dm-multipath does not know what to
do with low level device errors, but wanted transport errors returned
quickly. Other drivers like the scsi_dh (formerly dm hardware handlers)
modules, want all errors fast failed.

I can add documentation or we can just change the code to better suite
your needs.
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