[Bug 644489] Re: constantly changes /dev/disk/by-id/{scsi, wwn}-* LUN symlinks with multipathing

[John Morrissey]

On Sat, Jun 18, 2011 at 09:00:59PM -0000, Peter Petrakis wrote:
> Excellent, you're still interested. I've got a fix for you to try.
> Attached is a custom version of mpath_prio_netapp that should
> not generate any more change events for you. Please post
> for comparison that this new version returns the same data
> as the old one.
[snip]
> Once you verify that the updated prio checker no longer
> generates change events, start up multipathd again and
> verify that this continues to be true. Thanks!

Everything seems to be as anticipated:

[jwm at pxe-237.roch.ny:pts/0 ~> sudo apt-get install multipath-tools=0.4.8-14ubuntu4 multipath-tools-boot=0.4.8-14ubuntu4 kpartx=0.4.8-14ubuntu4
[...]
[jwm at pxe-237.roch.ny:pts/0 ~> for i in /dev/sd[abcd]; do sudo mpath_prio_netapp $i; done
4
1
4
1
[jwm at pxe-237.roch.ny:pts/0 ~> sudo apt-get dist-upgrade
[...]
Preparing to replace kpartx 0.4.8-14ubuntu4 (using .../kpartx_0.4.8-14ubuntu5~lp644489_amd64.deb) ...
[...]
Preparing to replace multipath-tools 0.4.8-14ubuntu4 (using .../multipath-tools_0.4.8-14ubuntu5~lp644489_amd64.deb) ...
[...]
Preparing to replace multipath-tools-boot 0.4.8-14ubuntu4 (using .../multipath-tools-boot_0.4.8-14ubuntu5~lp644489_all.deb) ...
[...]
[jwm at pxe-237.roch.ny:pts/0 ~> for i in /dev/sd[abcd]; do sudo mpath_prio_netapp $i; done
4
1
4
1
[jwm at pxe-237.roch.ny:pts/0 ~> psg multi
root     30498 30498  0.0  0.0  85396  3500 ?     SLl  futex_ 13:24 /sbin/multipathd
root     30498 30500  0.0  0.0  85396  3500 ?     SLl  futex_ 13:24 /sbin/multipathd
root     30498 30514  0.0  0.0  85396  3500 ?     SLl  dm_wai 13:24 /sbin/multipathd
root     30498 30515  0.0  0.0  85396  3500 ?     SLl  hrtime 13:24 /sbin/multipathd
root     30498 30516  0.0  0.0  85396  3500 ?     SLl  skb_re 13:24 /sbin/multipathd
root     30498 30517  0.0  0.0  85396  3500 ?     SLl  poll_s 13:24 /sbin/multipathd
root     30498 30518  0.0  0.0  85396  3500 ?     SLl  futex_ 13:24 /sbin/multipathd
[jwm at pxe-237.roch.ny:pts/0 ~> sudo udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

[no events generated]

john
-- 
John Morrissey          _o            /\         ----  __o
jwm at horde.net        _-< \_          /  \       ----  <  \,
www.horde.net/    __(_)/_(_)________/    \_______(_) /_(_)__

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https://bugs.launchpad.net/bugs/644489

Title:
  constantly changes /dev/disk/by-id/{scsi,wwn}-* LUN symlinks with
  multipathing

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