From: Mike Snitzer <snitzer@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
dm-devel@redhat.com, linux-block@vger.kernel.org
Subject: Re: [PATCH 4/8] block: support delayed holder registration
Date: Thu, 29 Jul 2021 12:32:39 -0400 [thread overview]
Message-ID: <YQLYJ3C5LVI3Lu1r@redhat.com> (raw)
In-Reply-To: <20210725055458.29008-5-hch@lst.de>
On Sun, Jul 25 2021 at 1:54P -0400,
Christoph Hellwig <hch@lst.de> wrote:
> device mapper needs to register holders before it is ready to do I/O.
> Currently it does so by registering the disk early, which has all kinds
> of bad side effects. Support registering holders on an initialized but
> not registered disk instead by delaying the sysfs registration until the
> disk is registered.
Maybe expand "bad side effects" in header to include what you detailed here?:
https://listman.redhat.com/archives/dm-devel/2021-July/msg00130.html
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
WARNING: multiple messages have this Message-ID (diff)
From: Mike Snitzer <snitzer@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, dm-devel@redhat.com
Subject: Re: [dm-devel] [PATCH 4/8] block: support delayed holder registration
Date: Thu, 29 Jul 2021 12:32:39 -0400 [thread overview]
Message-ID: <YQLYJ3C5LVI3Lu1r@redhat.com> (raw)
In-Reply-To: <20210725055458.29008-5-hch@lst.de>
On Sun, Jul 25 2021 at 1:54P -0400,
Christoph Hellwig <hch@lst.de> wrote:
> device mapper needs to register holders before it is ready to do I/O.
> Currently it does so by registering the disk early, which has all kinds
> of bad side effects. Support registering holders on an initialized but
> not registered disk instead by delaying the sysfs registration until the
> disk is registered.
Maybe expand "bad side effects" in header to include what you detailed here?:
https://listman.redhat.com/archives/dm-devel/2021-July/msg00130.html
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
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next prev parent reply other threads:[~2021-07-29 16:32 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-25 5:54 use regular gendisk registration in device mapper Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-25 5:54 ` [PATCH 1/8] block: make the block holder code optional Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-29 16:25 ` Mike Snitzer
2021-07-29 16:25 ` [dm-devel] " Mike Snitzer
2021-07-25 5:54 ` [PATCH 2/8] block: remove the extra kobject reference in bd_link_disk_holder Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-29 16:27 ` Mike Snitzer
2021-07-29 16:27 ` [dm-devel] " Mike Snitzer
2021-07-25 5:54 ` [PATCH 3/8] block: look up holders by bdev Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-25 5:54 ` [PATCH 4/8] block: support delayed holder registration Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-27 16:06 ` Mike Snitzer
2021-07-27 16:06 ` [dm-devel] " Mike Snitzer
2021-07-28 6:54 ` Christoph Hellwig
2021-07-28 6:54 ` [dm-devel] " Christoph Hellwig
2021-07-29 16:32 ` Mike Snitzer [this message]
2021-07-29 16:32 ` Mike Snitzer
2021-07-25 5:54 ` [PATCH 5/8] dm: cleanup cleanup_mapped_device Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-29 16:33 ` Mike Snitzer
2021-07-29 16:33 ` [dm-devel] " Mike Snitzer
2021-07-25 5:54 ` [PATCH 6/8] dm: move setting md->type into dm_setup_md_queue Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-29 16:34 ` Mike Snitzer
2021-07-29 16:34 ` [dm-devel] " Mike Snitzer
2021-07-25 5:54 ` [PATCH 7/8] dm: delay registering the gendisk Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-29 16:36 ` Mike Snitzer
2021-07-29 16:36 ` [dm-devel] " Mike Snitzer
2021-07-25 5:54 ` [PATCH 8/8] block: remove support for delayed queue registrations Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] " Christoph Hellwig
2021-07-29 16:37 ` Mike Snitzer
2021-07-29 16:37 ` [dm-devel] " Mike Snitzer
2021-07-27 15:58 ` use regular gendisk registration in device mapper Mike Snitzer
2021-07-27 15:58 ` [dm-devel] " Mike Snitzer
2021-07-27 16:02 ` Christoph Hellwig
2021-07-27 16:02 ` [dm-devel] " Christoph Hellwig
2021-07-27 16:18 ` Mike Snitzer
2021-07-27 16:18 ` [dm-devel] " Mike Snitzer
2021-07-27 20:38 ` Milan Broz
2021-07-27 20:38 ` Milan Broz
2021-07-28 7:06 ` Christoph Hellwig
2021-07-28 7:06 ` Christoph Hellwig
2021-07-28 8:37 ` Milan Broz
2021-07-28 8:37 ` Milan Broz
2021-07-28 11:24 ` Christoph Hellwig
2021-07-28 11:24 ` Christoph Hellwig
2021-07-29 15:01 ` Milan Broz
2021-07-29 15:01 ` Milan Broz
2021-07-28 16:17 ` Mike Snitzer
2021-07-28 16:17 ` [dm-devel] " Mike Snitzer
2021-07-29 7:50 ` Milan Broz
2021-07-29 7:50 ` [dm-devel] " Milan Broz
2021-07-27 22:52 ` Mike Snitzer
2021-07-27 22:52 ` [dm-devel] " Mike Snitzer
2021-08-04 9:41 use regular gendisk registration in device mapper v2 Christoph Hellwig
2021-08-04 9:41 ` [PATCH 4/8] block: support delayed holder registration Christoph Hellwig
[not found] ` <CGME20210810213058eucas1p109323e3c3ecaa76d37d8cf63b6d8ecfd@eucas1p1.samsung.com>
2021-08-10 21:30 ` Marek Szyprowski
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