On Sat, Apr 10, 2010 at 01:29:08PM -0700, Antonio Olivares wrote: > Dear folks, > > I have encountered this so called sleeping function several times in a good while (kernel 2.6.27, 2.6.29, 2.6.30, 2.6.31, 2.6.32) Fedora based kernels and compiled kernels from kernel.org, > > I am asking this because I see this again and again. I would like to know what is in there so if I can do something about it, or just live with it since it appears to be harmless, but anyhow it is annoying :( > > BUG: sleeping function called from invalid context at include/linux/kernel.h:158 > in_atomic(): 0, irqs_disabled(): 1, pid: 9713, name: slmodemd > Pid: 9713, comm: slmodemd Tainted: P 2.6.32.10-90.fc12.i686.PAE #1 > Call Trace: > [<c043372f>] __might_sleep+0xca/0xd1 > [<c05c6c3a>] might_fault+0x19/0x20 > [<c05c6d8e>] copy_to_user+0x34/0x10a > [<fe2b32ca>] amrmo_read+0x50/0x66 [slamr] > [<fe2b327a>] ? amrmo_read+0x0/0x66 [slamr] > [<c04e15fc>] vfs_read+0x82/0xe1 > [<c04e9d17>] ? path_put+0x1a/0x1d > [<c04e16f9>] sys_read+0x40/0x62 > [<c040907b>] sysenter_do_call+0x12/0x28 The source code to the slamr module (amrmo_read() function) is not present in Fedora or kernel.org. The BUG message is complaining that something (the amrmo_read() function) has disabled interrupts (the irqs_disabled(): 1 part of the message), while at the same time calling a function (copy_to_user()) which can sleep (the process could be unscheduled or mapped out at the moment copy_to_user() is called), so you could wind up deadlocked (interrupts off so nothing to wake the scheduler back up). This is a bug in the slamr driver. Thanks, Matt -- Matt Domsch Technology Strategist Dell | Office of the CTO -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
