Re: [dm-devel] [PATCH v3 11/26] block: Add submit_bio_wait(), removefrom md

[Hannes Reinecke]

On 10/02/2012 10:11 PM, Kent Overstreet wrote:
> On Tue, Oct 02, 2012 at 03:41:32PM -0400, Vivek Goyal wrote:
> > On Mon, Sep 24, 2012 at 03:34:51PM -0700, Kent Overstreet wrote:
> > > Random cleanup - this code was duplicated and it's not really specific
> > > to md.
> > >
> > > Also added the ability to return the actual error code.
> >
> > Who is going to make use of actual error code and why checking
> > BIO_UPTODATE is not sufficient (as existing code is doing)?
>
> Some things do, though it's not common and I forget where I saw it -
> checking for -ENOTSUPPORTED vs. other stuff
There are also additional error codes like -ENOLINK when the nexus 
is dropped. Quite useful in multipathed or clustered environs.

Cheers,

Hannes
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Dr. Hannes Reinecke		      zSeries & Storage
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