Re: [PATCH 1/3] lockdep: Move lock events under lockdep recursionprotection

[Jens Axboe]

On Wed, Mar 10 2010, Peter Zijlstra wrote:
> On Wed, 2010-03-10 at 01:05 +0100, Frederic Weisbecker wrote:
> > On Tue, Mar 09, 2010 at 09:35:37AM +0100, Jens Axboe wrote:
> > > Which, btw, throws a new lockdep warning fest:
> > > 
> > > [   42.247718] scsi7 : ioc0: LSISAS1068E B3, FwRev=011b0300h,
> > Ports=1, MaxQ=483, IRQ=26
> > > [   42.281125] BUG: key ffff880c7cb75250 not in .data!
> > > [   42.288346] ------------[ cut here ]------------
> > > [   42.294490] WARNING: at kernel/lockdep.c:2706 lockdep_init_map
> > +0x545/0x5f0()
> > > [   42.304013] Hardware name: QSSC-S4R
> > > [   42.309674] Modules linked in: hid_apple usbhid ehci_hcd uhci_hcd
> > usbcore nls_base mptsas(+) mptscsih mptbase scsi_transport_sas igb sg
> > sr_mod cdrom
> > > [   42.332072] Pid: 5197, comm: modprobe Not tainted 2.6.34-rc1 #176
> > > [   42.340597] Call Trace:
> > > [   42.345335]  [<ffffffff8107fb8d>] ? is_module_address+0x2d/0x60
> > > [   42.353670]  [<ffffffff81074aa5>] ? lockdep_init_map+0x545/0x5f0
> > > [   42.362154]  [<ffffffff81044648>] warn_slowpath_common+0x78/0xd0
> > > [   42.371913]  [<ffffffff810446af>] warn_slowpath_null+0xf/0x20
> > > [   42.380109]  [<ffffffff81074aa5>] lockdep_init_map+0x545/0x5f0
> > 
> > 
> > 
> > This doesn't look related to my patch, it also happen in -rc1 right?
> 
> 
> The per-cpu changes broke lockdep, Tejun already posted patches for
> this:
> 
> http://lkml.org/lkml/2010/3/10/76
> http://lkml.org/lkml/2010/3/10/79

Ah good, saves me the trouble of locating it, thanks!

-- 
Jens Axboe

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