On Wed, 15 Feb 2012 16:13:02 -0800 Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> wrote: > On 02/15/2012 03:54 PM, Kevin Hilman wrote: > > Luciano Coelho<coelho@xxxxxx> writes: > > > > [...] > > > >> I just tried this on my Panda and I keep getting this kind of BUGs. It > >> spams my console so much that is pretty much unusable: > >> > >> [ 336.172302] BUG: sleeping function called from invalid context at include/linux/freezer.h:46 > >> [ 336.181213] in_atomic(): 0, irqs_disabled(): 128, pid: 1618, name: ntpd > >> [ 336.181213] INFO: lockdep is turned off. > >> [ 336.181213] irq event stamp: 0 > >> [ 336.181213] hardirqs last enabled at (0): [< (null)>] (null) > >> [ 336.201660] hardirqs last disabled at (0): [<c0042314>] copy_process+0x3ec/0x105c > >> [ 336.209625] softirqs last enabled at (0): [<c0042314>] copy_process+0x3ec/0x105c > >> [ 336.217498] softirqs last disabled at (0): [< (null)>] (null) > >> [ 336.217498] [<c001e1e4>] (unwind_backtrace+0x0/0x148) from [<c0502c24>] (dump_stack+0x20/0x24) > >> [ 336.232879] [<c0502c24>] (dump_stack+0x20/0x24) from [<c0077998>] (__might_sleep+0x130/0x134) > >> [ 336.232879] [<c0077998>] (__might_sleep+0x130/0x134) from [<c0018998>] (do_signal+0x54/0x600) > >> [ 336.250793] [<c0018998>] (do_signal+0x54/0x600) from [<c0018fa4>] (do_notify_resume+0x60/0x6c) > >> [ 336.250793] [<c0018fa4>] (do_notify_resume+0x60/0x6c) from [<c00154e4>] (work_pending+0x24/0x28) > >> > >> I have also seen this in 3.3-rc3 (both on Panda (OMAP4460) and on Blaze > >> (OMAP4430) boards) and I was hoping your tree would have the fix for it, > >> but it doesn't. :( The device boots and seems to work otherwise, but > >> this is annoying and looks shaky. > >> > >> I saw something related to this in another thread from a few months ago, > >> and one patch proposal by Russell, but I didn't find any conclusion or > >> any related patch queued up for upstream. > >> > >> Is there any solution for this? I use a tuned .config (attached) and not > >> the one generated by omap2plus_defconfig (which I didn't try as > >> vanilla). > > > > I see the same thing with your ~/.config, but I don't think this is OMAP > > specific. I suspect this will happen on any ARM platform that has > > CONFIG_DEBUG_ATOMIC_SLEEP=y. > > > > It appears to be a problem with the recently added audit support for > > ARM, since reverting the commit below makes this BUG go away. > > False alarm. reverting the audit commit didn't make the problem go > away. It was gone only because I also disabled > CONFIG_DEBUG_ATOMIC_SLEEP. :/ > > To debug this further, you might bisect it back to v3.2 because the > problem isn't there in v3.2 I "fixed" this by applying https://lkml.org/lkml/2011/8/25/231 as shown here: http://neil.brown.name/git?p=gta04;a=commitdiff;h=b43a97aefed9990811ed95676db58538f7279eb6 because google found some email that suggested it. It worked but I didn't even try to understand the patch. NeilBrown
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