Description of problem: For a while now, booting on Mac Intel Mini (solo) has been giving me this non-fatal TB: ... Lukewarm IQ detected in hotplug locking BUG: warning at kernel/cpu.c:38/lock_cpu_hotplug() (Not tainted) [<c04051ea>] show_trace_log_lvl+0x54/0xfd [<c04057a6>] show_trace+0xd/0x10 [<c04058bf>] dump_stack+0x19/0x1b [<c043f2d3>] lock_cpu_hotplug+0x49/0x6f [<c04338e3>] __create_workqueue+0x52/0x116 [<f8c0134b>] cpufreq_governor_dbs+0x9f/0x2c3 [cpufreq_ondemand] [<c05a1e8f>] __cpufreq_governor+0x57/0xd8 [<c05a204d>] __cpufreq_set_policy+0x13d/0x1a9 [<c05a225f>] store_scaling_governor+0x12d/0x15b [<c05a18e0>] store+0x37/0x48 [<c04a8db4>] sysfs_write_file+0xab/0xd1 [<c0471ffb>] vfs_write+0xab/0x157 [<c0472640>] sys_write+0x3b/0x60 [<c0403faf>] syscall_call+0x7/0xb ... Version-Release number of selected component (if applicable): icon@mini:[~]$ uname -r 2.6.17-1.2462.fc6 How reproducible: Every boot.
This is the new flavour of the bug referenced in 197803 It's being worked on.
*** Bug 200306 has been marked as a duplicate of this bug. ***
*** This bug should have been marked as a duplicate of bug 200306 since 200306 < 200638, right? ***
not necessarily. there's no rule that bugs must be duped one way or the other.
kernel 2.6.17-1.2488.fc6 ... ============================================= [ INFO: possible recursive locking detected ] --------------------------------------------- vol_id/903 is trying to acquire lock: (&md->io_lock){----}, at: [<e08ce48e>] dm_request+0x18/0xea [dm_mod] but task is already holding lock: (&md->io_lock){----}, at: [<e08ce48e>] dm_request+0x18/0xea [dm_mod] other info that might help us debug this: 1 lock held by vol_id/903: #0: (&md->io_lock){----}, at: [<e08ce48e>] dm_request+0x18/0xea [dm_mod] stack backtrace: [<c04051ee>] show_trace_log_lvl+0x58/0x159 [<c0405802>] show_trace+0xd/0x10 [<c040591b>] dump_stack+0x19/0x1b [<c043b842>] __lock_acquire+0x773/0x997 [<c043bfd7>] lock_acquire+0x4b/0x6c [<c0439030>] down_read+0x2d/0x40 [<e08ce48e>] dm_request+0x18/0xea [dm_mod] [<c04d5169>] generic_make_request+0x28c/0x29c [<e08cd44c>] __map_bio+0xc1/0xef [dm_mod] [<e08cdd27>] __split_bio+0x159/0x3a1 [dm_mod] [<e08ce552>] dm_request+0xdc/0xea [dm_mod] [<c04d5169>] generic_make_request+0x28c/0x29c [<c04d6f92>] submit_bio+0xb1/0xb8 [<c04735dd>] submit_bh+0xfc/0x11b [<c0475eda>] block_read_full_page+0x2c3/0x2d3 [<c047868d>] blkdev_readpage+0xf/0x11 [<c045af57>] __do_page_cache_readahead+0x15f/0x1af [<c045aff1>] blockable_page_cache_readahead+0x4a/0x9f [<c045b1eb>] page_cache_readahead+0x112/0x174 [<c0455a85>] do_generic_mapping_read+0x12b/0x451 [<c04565b5>] __generic_file_aio_read+0x187/0x1e8 [<c045756c>] generic_file_read+0x87/0x9b [<c04723ec>] vfs_read+0xa9/0x155 [<c047287c>] sys_read+0x3b/0x60 [<c0403faf>] syscall_call+0x7/0xb DWARF2 unwinder stuck at syscall_call+0x7/0xb Leftover inexact backtrace: [<c0405802>] show_trace+0xd/0x10 [<c040591b>] dump_stack+0x19/0x1b [<c043b842>] __lock_acquire+0x773/0x997 [<c043bfd7>] lock_acquire+0x4b/0x6c [<c0439030>] down_read+0x2d/0x40 [<e08ce48e>] dm_request+0x18/0xea [dm_mod] [<c04d5169>] generic_make_request+0x28c/0x29c [<e08cd44c>] __map_bio+0xc1/0xef [dm_mod] [<e08cdd27>] __split_bio+0x159/0x3a1 [dm_mod] [<e08ce552>] dm_request+0xdc/0xea [dm_mod] [<c04d5169>] generic_make_request+0x28c/0x29c [<c04d6f92>] submit_bio+0xb1/0xb8 [<c04735dd>] submit_bh+0xfc/0x11b [<c0475eda>] block_read_full_page+0x2c3/0x2d3 [<c047868d>] blkdev_readpage+0xf/0x11 [<c045af57>] __do_page_cache_readahead+0x15f/0x1af [<c045aff1>] blockable_page_cache_readahead+0x4a/0x9f [<c045b1eb>] page_cache_readahead+0x112/0x174 [<c0455a85>] do_generic_mapping_read+0x12b/0x451 [<c04565b5>] __generic_file_aio_read+0x187/0x1e8 [<c045756c>] generic_file_read+0x87/0x9b [<c04723ec>] vfs_read+0xa9/0x155 [<c047287c>] sys_read+0x3b/0x60 [<c0403faf>] syscall_call+0x7/0xb FDC 0 is a post-1991 82077 PM: Adding info for platform:floppy.0 DVB: registering frontend 0 (Philips TDA10046H DVB-T)... budget-av: ci interface initialised. PM: Adding info for No Bus:i2c-1 ACPI: PCI Interrupt 0000:00:11.5[C] -> GSI 22 (level, low) -> IRQ 201 PCI: Setting latency timer of device 0000:00:11.5 to 64 PM: Adding info for ac97:0-0:ALC850 PCI: Enabling device 0000:00:11.6 (0000 -> 0001) ACPI: PCI Interrupt 0000:00:11.6[C] -> GSI 22 (level, low) -> IRQ 201 PCI: Setting latency timer of device 0000:00:11.6 to 64 ACPI: PCI interrupt for device 0000:00:11.6 disabled VIA 82xx Modem: probe of 0000:00:11.6 failed with error -13 parport: PnPBIOS parport detected. parport0: PC-style at 0x378, irq 7 [PCSPP] lp0: using parport0 (interrupt-driven). lp0: console ready ACPI: Power Button (FF) [PWRF] ACPI: Power Button (CM) [PWRB] ACPI: Sleep Button (CM) [SLPB] ibm_acpi: ec object not found md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. EXT3 FS on sda6, internal journal Adding 1052248k swap on /dev/dm-3. Priority:-1 extents:1 across:1052248k Lukewarm IQ detected in hotplug locking BUG: warning at kernel/cpu.c:38/lock_cpu_hotplug() (Not tainted) [<c04051ee>] show_trace_log_lvl+0x58/0x159 [<c0405802>] show_trace+0xd/0x10 [<c040591b>] dump_stack+0x19/0x1b [<c043f38f>] lock_cpu_hotplug+0x49/0x6f [<c04338e3>] __create_workqueue+0x52/0x116 [<e0be134b>] cpufreq_governor_dbs+0x9f/0x2c3 [cpufreq_ondemand] [<c05a20a7>] __cpufreq_governor+0x57/0xd8 [<c05a2265>] __cpufreq_set_policy+0x13d/0x1a9 [<c05a2477>] store_scaling_governor+0x12d/0x15b [<c05a1af8>] store+0x37/0x48 [<c04a8fb4>] sysfs_write_file+0xab/0xd1 [<c0472297>] vfs_write+0xab/0x157 [<c04728dc>] sys_write+0x3b/0x60 [<c0403faf>] syscall_call+0x7/0xb DWARF2 unwinder stuck at syscall_call+0x7/0xb Leftover inexact backtrace: [<c0405802>] show_trace+0xd/0x10 [<c040591b>] dump_stack+0x19/0x1b [<c043f38f>] lock_cpu_hotplug+0x49/0x6f [<c04338e3>] __create_workqueue+0x52/0x116 [<e0be134b>] cpufreq_governor_dbs+0x9f/0x2c3 [cpufreq_ondemand] [<c05a20a7>] __cpufreq_governor+0x57/0xd8 [<c05a2265>] __cpufreq_set_policy+0x13d/0x1a9 [<c05a2477>] store_scaling_governor+0x12d/0x15b [<c05a1af8>] store+0x37/0x48 [<c04a8fb4>] sysfs_write_file+0xab/0xd1 [<c0472297>] vfs_write+0xab/0x157 [<c04728dc>] sys_write+0x3b/0x60 [<c0403faf>] syscall_call+0x7/0xb ip_tables: (C) 2000-2006 Netfilter Core Team Time: acpi_pm clocksource has been installed. ... more info needed ???
no change with kernel 2.6.17-1.2505.fc6
No change with kernel 2.6.17-1.2527.fc6 x86_64
*** Bug 201729 has been marked as a duplicate of this bug. ***
dmesg from 2.6.17-1.2543.fc6: the lines starting with Lukewarm IQ detected in hotplug locking -BUG: warning at kernel/cpu.c:43/lock_cpu_hotplug() (Not tainted) ... and the following -DWARF2 unwinder stuck at syscall_call+0x7/0xb -Leftover inexact backtrace: ... are gone (for me) ! thx
This should finally be fixed.
vol_id/903 is trying to acquire lock ... is still alive with 2.6.17-1.2586.fc6! is this part handled on another bz ?
today i wrote a bz. bz 205085