Re: discuss about commit 3b0f9ce: filter-mpath: get wwids from sysfs vpd_pg83

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On Wed, 2023-11-15 at 13:15 +0800, Heming Zhao wrote:
> On 11/15/23 04:51, David Teigland wrote:
> > 
> > > 
> > 
> > Could you try multipath_wwids_file="" and see if that's sufficient
> > before
> > we add a new setting that's nearly the same?
> > 
> 
> I did some test.
> 1. multipath_wwids_file="" failed boot if without commit
> 17a3585cbb55d9a15
>     So empty value is not enough, or some code logic changed which
> makes lvm2
>     denying multipath dev.

Well, 17a3585 ("pvscan: use alternate device names from DEVLINKS to
check filter") fixes a different issue. I had a remark about it in my
first post in this thread, but nobody has replied to that yet (hint:
I'd appreciate if someone did).

The "multipath_wwids_file" test makes most sense with an existing WWIDs
file and "multipath=off" boot parameter, or multipathd disabled in some
other way.

Regards
Martin






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