linux-kernel - Re: Pe: [PATCH v5 1/3] virtio-scsi: first version

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Message-ID: <20120214011144.GB5192@redhat.com>
Date:	Tue, 14 Feb 2012 03:11:45 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	ronnie sahlberg <ronniesahlberg@...il.com>
Cc:	Hannes Reinecke <hare@...e.de>, Dor Laor <dlaor@...hat.com>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Christian Hoff <christian.hoff@...ibm.com>,
	borntrae@...ux.vnet.ibm.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	rusty@...tcorp.com.au, Stefan Hajnoczi <stefanha@...il.com>,
	target-devel <target-devel@...r.kernel.org>
Subject: Re: Pe: [PATCH v5 1/3] virtio-scsi: first version

On Tue, Feb 14, 2012 at 11:49:55AM +1100, ronnie sahlberg wrote:
> By just exposing this device to the kernel, the kernel keeps sending,
> or if not the kernel maybe some other process trying to poll the
> status?
> 
> every few seconds :
> PREVENT_ALLOW_MEDIUM_REMOVAL  prevent removal
> PREVENT_ALLOW_MEDIUM_REMOVAL  to immediatel change it back to allow
> removal again
> TEST_UNIT_READY
> 
> 
> After I run this
> mount /dev/sdd1 /mnt
> 
> The kernel sends a single
> PREVENT_ALLOW_MEDIUM_REMOVAL to prevent removal
> then every few seconds a
> TEST_UNIT_READY
> 
> 
> This is what it does for removable SBC disks. Maybe it does something
> differently for "permanent" SBC disks.
> 
> regards
> ronnie sahlberg

There used to be a daemon for this.

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