linux-kernel - Re: 2.6.23-rc1-mm2

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Date:	Fri, 3 Aug 2007 13:00:46 +0200
From:	Marc Dietrich <Marc.Dietrich@...physik.uni-giessen.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, nfs@...ts.sourceforge.net,
	Neil Brown <neilb@...e.de>
Subject: Re: 2.6.23-rc1-mm2


Hi,

Am Wednesday 01 August 2007 08:09 schrieb Andrew Morton:
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc1/2.
>6.23-rc1-mm2/
>
>
> - the git-block tree remains dropped due to disageement with the Vaio
>
> - git-e1000new was withdrawn by the authors
>
> - git-wireless is back.  It is still a >3MB diff, and appears to compile.
>
> - Is anyone testing the kgdb code in here?

I still get some nfs related locking bug.

I applied 

linux-2.6.23-001-fix_rpciod_down_race.dif
linux-2.6.23-003-fix_locking_regression.dif
linux-2.6.23-004-fix_stateid_regression.dif

=============================================
[ INFO: possible recursive locking detected ]
2.6.23-rc1-mm2 #3
---------------------------------------------
events/0/5 is trying to acquire lock:
 (events){--..}, at: [<c012ed90>] flush_workqueue+0x0/0x70

but task is already holding lock:
 (events){--..}, at: [<c012e5c4>] run_workqueue+0xd4/0x1e0

other info that might help us debug this:
2 locks held by events/0/5:
 #0:  (events){--..}, at: [<c012e5c4>] run_workqueue+0xd4/0x1e0
 #1:  ((nfs_automount_task).work){--..}, at: [<c012e5c4>] 
run_workqueue+0xd4/0x1e0

stack backtrace:
 [<c0104fda>] show_trace_log_lvl+0x1a/0x30
 [<c0105c02>] show_trace+0x12/0x20
 [<c0105d15>] dump_stack+0x15/0x20
 [<c013ee42>] __lock_acquire+0xc22/0x1030
 [<c013f2b1>] lock_acquire+0x61/0x80
 [<c012edd9>] flush_workqueue+0x49/0x70
 [<c012ee0d>] flush_scheduled_work+0xd/0x10
 [<dcf55c0c>] nfs_release_automount_timer+0x2c/0x30 [nfs]
 [<dcf45d8e>] nfs_free_server+0x9e/0xd0 [nfs]
 [<dcf4e626>] nfs_kill_super+0x16/0x20 [nfs]
 [<c017b38d>] deactivate_super+0x7d/0xa0
 [<c018f94b>] mntput_no_expire+0x4b/0x80
 [<c018fd94>] expire_mount_list+0xe4/0x140
 [<c0191219>] mark_mounts_for_expiry+0x99/0xb0
 [<dcf55d1d>] nfs_expire_automounts+0xd/0x40 [nfs]
 [<c012e61b>] run_workqueue+0x12b/0x1e0
 [<c012f05b>] worker_thread+0x9b/0x100
 [<c0131c72>] kthread+0x42/0x70
 [<c0104c0f>] kernel_thread_helper+0x7/0x18
 =======================

thanks

Marc

-- 
	"The enemy uses unauthorized weapons."
		 Lord Arthur Ponsonby, "Falsehood in Wartime: Propaganda Lies of the First 
World War", 1928
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