linux-kernel - Re: [PATCH 0/6] detect online disk resize

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Date:	Tue, 9 Sep 2008 10:41:32 +0300
From:	Pasi Kärkkäinen <pasik@....fi>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	Andrew Patterson <andrew.patterson@...com>,
	linux-scsi@...r.kernel.org, James.Bottomley@...senPartnership.com,
	linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk,
	axboe@...nel.dk, andmike@...ux.vnet.ibm.com, mike.miller@...com,
	genanr@...phone.com
Subject: Re: [PATCH 0/6] detect online disk resize

On Mon, Sep 08, 2008 at 02:01:14PM -0400, Jeff Moyer wrote:
> Andrew Patterson <andrew.patterson@...com> writes:
> 
> > This is version 2 of a patch series I submitted back in May 2008. This
> > version now checks for device size changes in the rescan_partitions()
> > routine.  Which in turn is called when a device is opened and in the
> > BLKRRPART ioctl.
> >
> > I am resubmitting this patch series as I got little response the
> > previous time.  Al Viro has told me offline that he would look at it this
> > time.
> 
> [...]
> 
> > I have tested this patch on SCSI and SmartArray (cciss)
> > devices. Device mapper still does not recognize device size changes
> > until the device is restarted.
> >
> > Jeff Moyer and Andy Ryan have done some light testing on the previous
> > version of this series.
> 
> I re-tested this new patch series using an iSCSI target via the
> following steps:
> 
> 1) Connect to iSCSI storage, creating the /dev/sd* devices.
> 2) Create a file system on the block device
> 3) Mount the file system, and leave a shell active on the mount point.
> 4) resize the iSCSI LUN
> 5) rescan the iSCSI session
> 6) resize the file system
> 
> This procedure worked fine.
> 

So now we just need a sane way to resize dm-multipath devices online :)

-- Pasi
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