From: Christoph Hellwig <hch@lst.de>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
Mike Snitzer <snitzer@redhat.com>,
linux-block@vger.kernel.org, dm-devel@redhat.com
Subject: Re: [dm-devel] [PATCH 4/8] block: support delayed holder registration
Date: Mon, 16 Aug 2021 09:21:58 +0200 [thread overview]
Message-ID: <20210816072158.GA27147@lst.de> (raw)
In-Reply-To: <a8d66952-ee44-d3fa-d699-439415b9abfe@roeck-us.net>
On Sun, Aug 15, 2021 at 07:27:37AM -0700, Guenter Roeck wrote:
> [ 14.467748][ T1] Possible unsafe locking scenario:
> [ 14.467748][ T1]
> [ 14.467928][ T1] CPU0 CPU1
> [ 14.468058][ T1] ---- ----
> [ 14.468187][ T1] lock(&disk->open_mutex);
> [ 14.468317][ T1] lock(mtd_table_mutex);
> [ 14.468493][ T1] lock(&disk->open_mutex);
> [ 14.468671][ T1] lock(mtd_table_mutex);
Oh, that ooks like a really old one, fixed by
b7abb0516822 ("mtd: fix lock hierarchy in deregister_mtd_blktrans")
in linux-next.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, dm-devel@redhat.com,
Christoph Hellwig <hch@lst.de>, Mike Snitzer <snitzer@redhat.com>
Subject: Re: [dm-devel] [PATCH 4/8] block: support delayed holder registration
Date: Mon, 16 Aug 2021 09:21:58 +0200 [thread overview]
Message-ID: <20210816072158.GA27147@lst.de> (raw)
In-Reply-To: <a8d66952-ee44-d3fa-d699-439415b9abfe@roeck-us.net>
On Sun, Aug 15, 2021 at 07:27:37AM -0700, Guenter Roeck wrote:
> [ 14.467748][ T1] Possible unsafe locking scenario:
> [ 14.467748][ T1]
> [ 14.467928][ T1] CPU0 CPU1
> [ 14.468058][ T1] ---- ----
> [ 14.468187][ T1] lock(&disk->open_mutex);
> [ 14.468317][ T1] lock(mtd_table_mutex);
> [ 14.468493][ T1] lock(&disk->open_mutex);
> [ 14.468671][ T1] lock(mtd_table_mutex);
Oh, that ooks like a really old one, fixed by
b7abb0516822 ("mtd: fix lock hierarchy in deregister_mtd_blktrans")
in linux-next.
--
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https://listman.redhat.com/mailman/listinfo/dm-devel
next prev parent reply other threads:[~2021-08-16 7:22 UTC|newest]
Thread overview: 70+ 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 [this message]
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
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 4/8] block: support delayed holder registration Christoph Hellwig
2021-07-27 16:06 ` Mike Snitzer
2021-07-28 6:54 ` Christoph Hellwig
2021-07-29 16:32 ` Mike Snitzer
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