linux-kernel - [git head f4b87dee9] BUG: using smp_processor

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Date:	Sat, 22 May 2010 23:36:59 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Al Viro <viro@...iv.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Eric Paris <eparis@...hat.com>
Subject: [git head f4b87dee9] BUG: using smp_processor_id() in preemptible (VFS-related)

Hi,

I get this every time on boot with current -git:

[    6.906133] EXT4-fs (sda7): mounted filesystem with ordered data mode
[    7.014359] BUG: using smp_processor_id() in preemptible [00000000] code: mount/1501
[    7.020570] caller is dqstats_inc+0x19/0x2c
[    7.026658] Pid: 1501, comm: mount Not tainted 2.6.34-tst #25
[    7.032792] Call Trace:
[    7.038859]  [<ffffffff8117c12b>] debug_smp_processor_id+0xcb/0xdc
[    7.045025]  [<ffffffff8111dfb5>] dqstats_inc+0x19/0x2c
[    7.051201]  [<ffffffff81120fac>] vfs_quota_sync+0x144/0x210
[    7.057349]  [<ffffffff810eccfa>] ? __shrink_dcache_sb+0x284/0x293
[    7.063574]  [<ffffffff810fc48d>] __sync_filesystem+0x3a/0x7e
[    7.069730]  [<ffffffff810fc552>] sync_filesystem+0x36/0x4c
[    7.075867]  [<ffffffff810deef0>] do_remount_sb+0x65/0x13c
[    7.081960]  [<ffffffff810f4359>] do_mount+0x251/0x78a
[    7.088039]  [<ffffffff810f2c3e>] ? copy_mount_options+0xda/0x146
[    7.094086]  [<ffffffff810f4911>] sys_mount+0x7f/0xb8
[    7.100085]  [<ffffffff81002aeb>] system_call_fastpath+0x16/0x1b
[    7.124208] BUG: using smp_processor_id() in preemptible [00000000] code: mount/1501
[    7.130307] caller is dqstats_inc+0x19/0x2c
[    7.136386] Pid: 1501, comm: mount Not tainted 2.6.34-tst #25
[    7.142512] Call Trace:
[    7.148629]  [<ffffffff8117c12b>] debug_smp_processor_id+0xcb/0xdc
[    7.154846]  [<ffffffff8111dfb5>] dqstats_inc+0x19/0x2c
[    7.161019]  [<ffffffff81120fac>] vfs_quota_sync+0x144/0x210
[    7.167171]  [<ffffffff810fc48d>] __sync_filesystem+0x3a/0x7e
[    7.173364]  [<ffffffff810fc563>] sync_filesystem+0x47/0x4c
[    7.179522]  [<ffffffff810deef0>] do_remount_sb+0x65/0x13c
[    7.185616]  [<ffffffff810f4359>] do_mount+0x251/0x78a
[    7.191663]  [<ffffffff810f2c3e>] ? copy_mount_options+0xda/0x146
[    7.197626]  [<ffffffff810f4911>] sys_mount+0x7f/0xb8
[    7.203493]  [<ffffffff81002aeb>] system_call_fastpath+0x16/0x1b
[   11.643596] udev: starting version 153

This is after reverting commit a7cf4145b (anon_inode: set S_IFREG on the
anon_inode) that the system is not really useable with.

Thanks,
Rafael
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