Re: [PATCHv2 0/7] Limit overall SCSI EH runtime

["Jörn Engel" <joern@logfs.org>]

On Tue, 2 July 2013 16:33:40 +0000, James Bottomley wrote:
> On Tue, 2013-07-02 at 10:58 -0400, Jörn Engel wrote:
> > On Tue, 2 July 2013 06:37:05 +0000, James Bottomley wrote:
> > > 
> > > I don't understand what you're getting at.  In a dual HBA situation,
> > > whether the second HBA is implicated or not depends on configuration and
> > > what the first HBA is doing. If it's just passively lost device state,
> > > then the second HBA should continue just fine.  If the insane HBA is
> > 
> > If the problem is an insane drive instead of an insane HBA, both HBAs
> > will be in roughly the same state at roughly the same time - assuming
> > they both send commands to the insane drive.  If they now go into
> > error handling and effectively shut off all the sane drives at roughly
> > the same time, the user is ****ed.
> 
> That's handled in device reset, so I don't understand your point.

Doesn't a device reset require all IO to the entire HBA to stop?
Hannes patches fixed that for aborts, but not for device reset yet,
afaics.

Jörn

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