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SubjectRe: block/bsg.c
On Tue, 17 Jul 2007 17:19:15 -0500
James Bottomley <James.Bottomley@SteelEye.com> wrote:

> > Adding 1020116k swap on /dev/hdc3. Priority:-1 extents:1 across:1020116k
> > generic_ide_ioctl: cmd=21382
> > generic_ide_ioctl: err=0
> > generic_ide_ioctl: cmd=1
> > program scsi_unique_id is using a deprecated SCSI ioctl, please convert it to SG_IO
>
> I can tell you what went wrong:
>
> This cmd=1 is SCSI_IOCTL_SEND_COMMAND, but that doesn't seem to be
> what's intended ... I'm guessing it's a legacy ide ioctl value which
> suddenly has become interpreted as a scsi_ioctl ... and certainly a non
> CD IDE device cannot handle a SCSI command, so all hell breaks loose.

An interrupt-off lockup is a pretty bad reaction to an unexpected ioctl
command. It makes one wonder if tht lockup can be triggered by other means...
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