From: Marian Csontos <mcsontos@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>,
Gang He <GHe@suse.com>
Subject: Re: [linux-lvm] "Unknown feature in status" message when running lvs/lvdisplay against cached LVs
Date: Mon, 8 Jul 2019 10:36:52 +0200 [thread overview]
Message-ID: <fe79eea6-0202-c412-0b3f-19beb3c2157c@redhat.com> (raw)
In-Reply-To: <CH2PR18MB3206304CD1B8DB908666342FCFF50@CH2PR18MB3206.namprd18.prod.outlook.com>
On 7/5/19 11:20 AM, Gang He wrote:
> Hi Guys,
>
> I uses lvm2-2.02.180, I got an error message when running lvs/lvdisplay against cached LVs.
> e.g.
> linux-v5ay:~ # lvs
> Unknown feature in status: 8 1324/8192 128 341/654272 129 151 225 1644 0 341 0 3 metadata2 writethrough no_discard_passdown 2 migration_threshold 2048 smq 0 rw -
> LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
> home system -wi-ao---- 17.99g
> root system Cwi-aoC--- 20.00g [lvc_root] [root_corig] 0.05 16.16 0.00
> swap system -wi-ao---- 2.00g
You need this patch:
https://sourceware.org/git/?p=lvm2.git;a=commit;h=adf9bf80a32500b45b37eb24b98fa7c2c933019e
Kernel introduced a new feature which is not recognized by lvm versions
released before the kernel (which is anything up to latest 2.02.185).
This will be included in the next lvm release.
-- Marian
>
> The bug can be reproduced stably with the below steps.
> Have a (virtual) machine with 2 disk drives
> Install os with LVM as root volume
> Then, add the second disk after os is installed.
> # pvcreate /dev/sdb
> # vgextend system /dev/sdb
> # lvcreate --type cache-pool -l 100%FREE -n lvc_root system /dev/sdb
> # lvconvert --type cache --cachepool system/lvc_root system/root
> then run `lvs` or `lvdisplay` command to trigger the issue
>
>
> Thanks
> Gang
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
next prev parent reply other threads:[~2019-07-08 8:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-05 9:20 [linux-lvm] "Unknown feature in status" message when running lvs/lvdisplay against cached LVs Gang He
2019-07-08 8:36 ` Marian Csontos [this message]
2019-07-10 6:20 ` Gang He
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