linux-kernel - Re: sata_mv port lockup on hotplug (kernel 2.6.38.2)

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Message-ID: <20110902011305.GE2752@htj.dyndns.org>
Date:	Fri, 2 Sep 2011 10:13:05 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Bruce Stenning <b.stenning@...igovision.com>
Cc:	Mark Lord <kernel@...savvy.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
	Jeff Garzik <jgarzik@...ox.com>
Subject: Re: sata_mv port lockup on hotplug (kernel 2.6.38.2)

Hello,

On Mon, Aug 29, 2011 at 04:49:29PM +0100, Bruce Stenning wrote:
> I should mention that we are now working on kernel 2.6.39.4 (and are choosing
> not to go with 3.x to limit changes as we progress towards final testing.)

I don't think it would make any difference.  The core EH hasn't
changed for some time now.

> [...]
> ata4: EH complete
> ata_scsi_error: EXIT
> __ata_port_freeze: ata4 port frozen
> ata_port_schedule_eh: port EH scheduled
> ata_scsiop_noop: ENTER
> ata_scsiop_read_cap: ENTER
> ata_scsiop_mode_sense: ENTER
> ata_scsiop_mode_sense: ENTER
> ata_scsiop_mode_sense: ENTER

That's weird.  Another EH is scheduled after one completes but EH
doesn't kick in.  Hmmm... can't see how that can happen.  How easily
can you reproduce the problem?

Thanks.

-- 
tejun
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