From: Alasdair G Kergon <agk@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>, Mike Snitzer <snitzer@redhat.com>,
linux-block@vger.kernel.org, dm-devel@redhat.com,
prajnoha@redhat.com
Subject: Re: [dm-devel] [PATCH 7/8] dm: delay registering the gendisk
Date: Tue, 10 Aug 2021 01:17:09 +0100 [thread overview]
Message-ID: <20210810001709.GA101579@agk-cloud1.hosts.prod.upshift.rdu2.redhat.com> (raw)
In-Reply-To: <20210809233143.GA101480@agk-cloud1.hosts.prod.upshift.rdu2.redhat.com>
On Tue, Aug 10, 2021 at 12:31:43AM +0100, Alasdair G Kergon wrote:
> When loading tables, our tools also always refer to devices using
> the 'major:minor' format, which isn't affected, rather than using
^^^^^^^^^^^^^^^^^^^^
Wrong - that is also affected.
So there is a new general constraint that a table must be loaded into a
device before another device's table can reference that device. (The
stacked device handling in lvm2 as supported by libdevmapper should
always be doing this.)
(The original implementation had to be a bit loose to accommodate
multipath device paths that were essentially placeholders at the point
they got set up.)
Alasdair
WARNING: multiple messages have this Message-ID (diff)
From: Alasdair G Kergon <agk@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, dm-devel@redhat.com,
prajnoha@redhat.com, Mike Snitzer <snitzer@redhat.com>
Subject: Re: [dm-devel] [PATCH 7/8] dm: delay registering the gendisk
Date: Tue, 10 Aug 2021 01:17:09 +0100 [thread overview]
Message-ID: <20210810001709.GA101579@agk-cloud1.hosts.prod.upshift.rdu2.redhat.com> (raw)
In-Reply-To: <20210809233143.GA101480@agk-cloud1.hosts.prod.upshift.rdu2.redhat.com>
On Tue, Aug 10, 2021 at 12:31:43AM +0100, Alasdair G Kergon wrote:
> When loading tables, our tools also always refer to devices using
> the 'major:minor' format, which isn't affected, rather than using
^^^^^^^^^^^^^^^^^^^^
Wrong - that is also affected.
So there is a new general constraint that a table must be loaded into a
device before another device's table can reference that device. (The
stacked device handling in lvm2 as supported by libdevmapper should
always be doing this.)
(The original implementation had to be a bit loose to accommodate
multipath device paths that were essentially placeholders at the point
they got set up.)
Alasdair
--
dm-devel mailing list
dm-devel@redhat.com
https://listman.redhat.com/mailman/listinfo/dm-devel
next prev parent reply other threads:[~2021-08-10 0:17 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 9:41 use regular gendisk registration in device mapper v2 Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-04 9:41 ` [PATCH 1/8] block: make the block holder code optional Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-04 9:41 ` [PATCH 2/8] block: remove the extra kobject reference in bd_link_disk_holder Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-04 9:41 ` [PATCH 3/8] block: look up holders by bdev Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-04 9:41 ` [PATCH 4/8] block: support delayed holder registration Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
[not found] ` <CGME20210810213058eucas1p109323e3c3ecaa76d37d8cf63b6d8ecfd@eucas1p1.samsung.com>
2021-08-10 21:30 ` Marek Szyprowski
2021-08-10 21:30 ` [dm-devel] " Marek Szyprowski
2021-08-14 21:13 ` Guenter Roeck
2021-08-14 21:13 ` Guenter Roeck
2021-08-15 7:07 ` Christoph Hellwig
2021-08-15 7:07 ` Christoph Hellwig
2021-08-15 14:27 ` Guenter Roeck
2021-08-15 14:27 ` Guenter Roeck
2021-08-16 7:21 ` Christoph Hellwig
2021-08-16 7:21 ` Christoph Hellwig
2021-08-16 14:17 ` Guenter Roeck
2021-08-16 14:17 ` Guenter Roeck
2021-08-20 15:08 ` Christoph Hellwig
2021-08-20 15:08 ` Christoph Hellwig
2021-08-21 3:17 ` Guenter Roeck
2021-08-21 3:17 ` Guenter Roeck
2021-08-18 2:51 ` Guenter Roeck
2021-08-18 2:51 ` Guenter Roeck
2021-08-04 9:41 ` [PATCH 5/8] dm: cleanup cleanup_mapped_device Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-04 9:41 ` [PATCH 6/8] dm: move setting md->type into dm_setup_md_queue Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-04 9:41 ` [PATCH 7/8] dm: delay registering the gendisk Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-09 23:31 ` Alasdair G Kergon
2021-08-09 23:31 ` Alasdair G Kergon
2021-08-10 0:17 ` Alasdair G Kergon [this message]
2021-08-10 0:17 ` Alasdair G Kergon
2021-08-10 13:12 ` Peter Rajnoha
2021-08-10 13:12 ` Peter Rajnoha
2021-08-10 15:05 ` Alasdair G Kergon
2021-08-10 15:05 ` Alasdair G Kergon
2022-07-07 3:29 ` Yu Kuai
2022-07-07 3:29 ` [dm-devel] " Yu Kuai
2022-07-07 5:24 ` Christoph Hellwig
2022-07-07 5:24 ` [dm-devel] " Christoph Hellwig
2022-07-07 7:20 ` Yu Kuai
2022-07-07 7:20 ` [dm-devel] " Yu Kuai
2022-07-15 3:24 ` Yu Kuai
2022-07-15 3:24 ` [dm-devel] " Yu Kuai
2022-08-01 1:04 ` Yu Kuai
2022-08-01 1:04 ` [dm-devel] " Yu Kuai
2021-08-04 9:41 ` [PATCH 8/8] block: remove support for delayed queue registrations Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] " Christoph Hellwig
2021-08-09 17:51 ` use regular gendisk registration in device mapper v2 Jens Axboe
2021-08-09 17:51 ` [dm-devel] " Jens Axboe
2021-08-10 0:36 ` Alasdair G Kergon
2021-08-10 0:36 ` Alasdair G Kergon
2021-08-10 14:41 ` Alasdair G Kergon
2021-08-10 14:41 ` Alasdair G Kergon
2021-08-19 15:58 ` holders not working properly, regression [was: Re: use regular gendisk registration in device mapper v2] Mike Snitzer
2021-08-19 15:58 ` [dm-devel] " Mike Snitzer
2021-08-19 18:05 ` Christoph Hellwig
2021-08-19 18:05 ` [dm-devel] " Christoph Hellwig
2021-08-19 22:08 ` Mike Snitzer
2021-08-19 22:08 ` [dm-devel] " Mike Snitzer
-- strict thread matches above, loose matches on Subject: below --
2021-07-25 5:54 use regular gendisk registration in device mapper Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] [PATCH 7/8] dm: delay registering the gendisk Christoph Hellwig
2021-07-29 16:36 ` Mike Snitzer
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