From: Maxim Levitsky <maximlevitsky@gmail.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: linux-pm <linux-pm@lists.linux-foundation.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Is it supposed to be ok to call del_gendisk while userspace is frozen?
Date: Sat, 13 Feb 2010 15:29:06 +0200 [thread overview]
Message-ID: <1266067746.16937.7.camel@maxim-laptop> (raw)
I noticed that currently calling del_gendisk leads to sure deadlock if
attemped from .suspend or .resume functions.
Something like that:
[<ffffffff8106620a>] ? prepare_to_wait+0x2a/0x90
[<ffffffff810790bd>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff8140db12>] ? _raw_spin_unlock_irqrestore+0x42/0x80
[<ffffffff8112a390>] ? bdi_sched_wait+0x0/0x20
[<ffffffff8112a39e>] bdi_sched_wait+0xe/0x20
[<ffffffff8140af6f>] __wait_on_bit+0x5f/0x90
[<ffffffff8112a390>] ? bdi_sched_wait+0x0/0x20
[<ffffffff8140b018>] out_of_line_wait_on_bit+0x78/0x90
[<ffffffff81065fd0>] ? wake_bit_function+0x0/0x40
[<ffffffff8112a2d3>] ? bdi_queue_work+0xa3/0xe0
[<ffffffff8112a37f>] bdi_sync_writeback+0x6f/0x80
[<ffffffff8112a3d2>] sync_inodes_sb+0x22/0x120
[<ffffffff8112f1d2>] __sync_filesystem+0x82/0x90
[<ffffffff8112f3db>] sync_filesystem+0x4b/0x70
[<ffffffff811391de>] fsync_bdev+0x2e/0x60
[<ffffffff812226be>] invalidate_partition+0x2e/0x50
[<ffffffff8116b92f>] del_gendisk+0x3f/0x140
[<ffffffffa00c0233>] mmc_blk_remove+0x33/0x60 [mmc_block]
[<ffffffff81338977>] mmc_bus_remove+0x17/0x20
[<ffffffff812ce746>] __device_release_driver+0x66/0xc0
[<ffffffff812ce89d>] device_release_driver+0x2d/0x40
[<ffffffff812cd9b5>] bus_remove_device+0xb5/0x120
[<ffffffff812cb46f>] device_del+0x12f/0x1a0
[<ffffffff81338a5b>] mmc_remove_card+0x5b/0x90
[<ffffffff8133ac27>] mmc_sd_remove+0x27/0x50
[<ffffffff81337d8c>] mmc_resume_host+0x10c/0x140
[<ffffffffa00850e9>] sdhci_resume_host+0x69/0xa0 [sdhci]
[<ffffffffa0bdc39e>] sdhci_pci_resume+0x8e/0xb0 [sdhci_pci]
bdi_queue_work seems to be the problem.
Some device drivers need to remove their cards logically in .suspend,
because the card is removable, and can be changed while system is
suspended.
Best regards,
Maxim Levitsky
next reply other threads:[~2010-02-13 13:36 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-13 13:29 Maxim Levitsky [this message]
2010-02-15 16:00 ` Maxim Levitsky
2010-02-15 21:04 ` Rafael J. Wysocki
2010-02-16 16:27 ` [linux-pm] " Alan Stern
2010-02-20 22:22 ` Maxim Levitsky
2010-02-23 12:33 ` Jens Axboe
2010-02-23 15:29 ` Alan Stern
2010-02-23 15:58 ` Jens Axboe
2010-02-23 16:33 ` Alan Stern
2010-02-23 22:16 ` Jens Axboe
2010-02-24 15:59 ` Alan Stern
2010-02-24 19:12 ` Jens Axboe
2010-02-24 20:19 ` Alan Stern
2010-02-23 16:42 ` Testing for dirty buffers on a block device Alan Stern
2010-02-23 22:13 ` Jens Axboe
2010-02-24 15:51 ` Alan Stern
2010-02-24 19:09 ` Jens Axboe
2010-02-24 20:09 ` Alan Stern
2010-02-25 8:20 ` Jens Axboe
2010-02-25 22:19 ` Dave Chinner
2010-03-01 6:35 ` [linux-pm] Is it supposed to be ok to call del_gendisk while userspace is frozen? Pavel Machek
2010-03-01 15:23 ` Alan Stern
2010-03-03 21:50 ` Pavel Machek
2010-03-03 22:23 ` Alan Stern
2010-03-04 0:23 ` Rafael J. Wysocki
2010-03-04 2:48 ` Alan Stern
2010-03-04 19:26 ` Rafael J. Wysocki
2010-03-04 19:36 ` Alan Stern
2010-03-04 20:04 ` Rafael J. Wysocki
2010-03-04 20:15 ` Pavel Machek
2010-04-22 23:40 ` Matt Reimer
2010-04-23 5:17 ` Rafael J. Wysocki
2010-05-11 23:55 ` Matt Reimer
2010-05-12 14:50 ` Alan Stern
2010-05-13 21:44 ` Matt Reimer
2010-05-13 21:54 ` Alan Stern
2010-05-13 22:20 ` Matt Reimer
2010-05-13 22:47 ` Nigel Cunningham
2010-05-15 2:37 ` Alan Stern
2010-05-15 2:53 ` Nigel Cunningham
2010-05-16 19:35 ` Rafael J. Wysocki
2010-05-15 2:32 ` Alan Stern
2010-05-15 20:30 ` Rafael J. Wysocki
2010-05-16 7:49 ` Nigel Cunningham
2010-05-16 19:38 ` Rafael J. Wysocki
2010-05-16 21:32 ` Nigel Cunningham
2010-05-17 2:22 ` Alan Stern
2010-05-17 7:45 ` Nigel Cunningham
2010-05-17 20:35 ` Rafael J. Wysocki
2010-05-17 22:51 ` Nigel Cunningham
2010-05-18 19:43 ` Rafael J. Wysocki
2010-05-18 20:06 ` Alan Stern
2010-05-24 19:02 ` Pavel Machek
2010-05-24 21:21 ` Nigel Cunningham
2010-03-04 13:53 ` Pavel Machek
2010-06-04 11:20 ` Maxim Levitsky
2010-06-04 14:59 ` Alan Stern
2010-06-04 15:19 ` Maxim Levitsky
2010-06-04 17:52 ` Alan Stern
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