Bug 64221
| Summary: | Warning at kernel/mutex.c:514 __mutex_lock_slowpath+0x27f/0x340 | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | blondie85 |
| Component: | Video(DRI - Intel) | Assignee: | Alan (alan) |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | alan, intel-gfx-bugs, patrik.r.jakobsson, peter |
| Priority: | P1 | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Kernel Version: | 3.11.6-1-ARCH | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | lspci -vv | ||
Locking bug in the GMA500 handling of the backlight events. I'll take a look at it when I get some time. CC Patrik. Thanks for CC Alan, let me know if you've fixed this. Otherwise I'll have some free time during the weekend for gma500 stuff. also this backlight bug cause the reset of kernel variable 'printk' which is undesirable: 1. sysctl kernel.printk kernel.printk = 3 3 3 3 2. /usr/lib/systemd/systemd-backlight load acpi_video1 3. sysctl kernel.printk kernel.printk = 15 3 3 3 The warning is still present in 3.14 (first noticed with 3.13): [ 9.528838] ------------[ cut here ]------------ [ 9.529145] WARNING: CPU: 1 PID: 0 at kernel/locking/mutex.c:516 __mutex_lock_slowpath+0x357/0x370() [ 9.529764] DEBUG_LOCKS_WARN_ON(in_interrupt()) [ 9.529999] Modules linked in: [ 9.530197] [..] [ 9.533605] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.14.0-rc2-custom-00267-g9398a10 #4 [ 9.533992] Hardware name: Shuttle Inc. XS36V/XS36V, BIOS 1.11 12/18/2012 [ 9.534313] 0000000000000009 ffff88012fc83d10 ffffffff8146cca0 ffff88012fc83d58 [ 9.534709] ffff88012fc83d48 ffffffff8104c45d ffff880129218c18 ffff880129218c18 [ 9.535102] ffff880129ac6bf0 0000000080808081 ffff880037aba12c ffff88012fc83da8 [ 9.535496] Call Trace: [ 9.535616] <IRQ> [<ffffffff8146cca0>] dump_stack+0x4d/0x6f [ 9.535923] [<ffffffff8104c45d>] warn_slowpath_common+0x7d/0xa0 [ 9.536210] [<ffffffff8104c4cc>] warn_slowpath_fmt+0x4c/0x50 [ 9.536487] [<ffffffff812303f5>] ? blk_run_queue+0x35/0x40 [ 9.536755] [<ffffffff814710e7>] __mutex_lock_slowpath+0x357/0x370 [ 9.537055] [<ffffffff81471112>] mutex_lock+0x12/0x22 [ 9.537310] [<ffffffffa0607536>] do_gma_backlight_set+0x26/0x50 [gma500_gfx] [ 9.537654] [<ffffffffa060761b>] gma_backlight_set+0x3b/0x40 [gma500_gfx] [ 9.537987] [<ffffffffa0617d94>] psb_intel_opregion_asle_intr+0xb4/0x100 [gma500_gfx] [ 9.538369] [<ffffffffa0615f98>] psb_irq_handler+0x1e8/0x1f0 [gma500_gfx] [ 9.538699] [<ffffffff8109ff4e>] handle_irq_event_percpu+0x3e/0x210 [ 9.539002] [<ffffffff810a015d>] handle_irq_event+0x3d/0x60 [ 9.539274] [<ffffffff810a2b47>] handle_edge_irq+0x77/0x140 [ 9.539545] [<ffffffff81004b7e>] handle_irq+0x1e/0x30 [ 9.539792] [<ffffffff8147c0cf>] do_IRQ+0x4f/0xf0 [ 9.540024] [<ffffffff81472a6a>] common_interrupt+0x6a/0x6a [ 9.540292] <EOI> [<ffffffff814722e5>] ? _raw_spin_unlock_irq+0x15/0x30 [ 9.540642] [<ffffffff810794aa>] finish_task_switch+0x4a/0xc0 [ 9.540922] [<ffffffff8146e260>] __schedule+0x340/0x8d0 [ 9.541178] [<ffffffff8102f7fd>] ? lapic_next_event+0x1d/0x30 [ 9.541459] [<ffffffff810b333b>] ? clockevents_program_event+0x6b/0xf0 [ 9.541776] [<ffffffff81071704>] ? __hrtimer_start_range_ns+0x1e4/0x3c0 [ 9.542096] [<ffffffff8146e819>] schedule+0x29/0x70 [ 9.542334] [<ffffffff8146ec16>] schedule_preempt_disabled+0x16/0x20 [ 9.542642] [<ffffffff8109f523>] cpu_startup_entry+0x113/0x270 [ 9.542926] [<ffffffff8102e2be>] start_secondary+0x1ce/0x270 [ 9.543199] ---[ end trace b803e0b43866ca06 ]--- I've pushed a fix for this problem to my gma500-next branch at https://github.com/patjak/drm-gma500 It will go into 3.15-rc1. Please test if you can. this warning is not present in dmesg output when using kernel 3.15-rc1 Tested with v3.15-rc1-49-g10ec34f, the warning is no longer present. Blondie, can you mark this bug as resolved? |
Created attachment 113111 [details] lspci -vv I see this warning in dmesg (and the system works fine after boot) [ 23.315096] ------------[ cut here ]------------ [ 23.315611] WARNING: CPU: 0 PID: 193 at kernel/mutex.c:514 __mutex_lock_slowpath+0x27f/0x340() [ 23.316498] DEBUG_LOCKS_WARN_ON(in_interrupt()) [ 23.316682] Modules linked in: [ 23.316682] battery button(+) processor(+) snd_timer snd soundcore evdev shpchp lpc_sch ext4 crc16 mbcache jbd2 xts gf128mul dm_crypt dm_mod ums_realtek usb_storage sd_mod ata_generic pata_acpi pata_sch libata scsi_mod uhci_hcd ehci_pci ehci_hcd usbcore usb_common gma500_gfx video i2c_algo_bit drm_kms_helper drm agpgart i2c_core [ 23.316682] CPU: 0 PID: 193 Comm: systemd-udevd Not tainted 3.11.6-1-ARCH #1 [ 23.316682] Hardware name: Dell Inc. Inspiron 1210 /0X605H, BIOS A04 05/03/2009 [ 23.316682] 00000000 00000000 f5761e04 c141c16f f5761e44 f5761e34 c10455de c1504ad8 [ 23.316682] f5761e60 000000c1 c1504af0 00000202 c141f99f c141f99f f50ab418 f50ab418 [ 23.316682] 80808081 f5761e4c c1045633 00000009 f5761e44 c1504ad8 f5761e60 f5761e90 [ 23.316682] Call Trace: [ 23.316682] [<c141c16f>] dump_stack+0x4b/0x79 [ 23.316682] [<c10455de>] warn_slowpath_common+0x7e/0xa0 [ 23.316682] [<c141f99f>] ? __mutex_lock_slowpath+0x27f/0x340 [ 23.316682] [<c141f99f>] ? __mutex_lock_slowpath+0x27f/0x340 [ 23.316682] [<c1045633>] warn_slowpath_fmt+0x33/0x40 [ 23.316682] [<c141f99f>] __mutex_lock_slowpath+0x27f/0x340 [ 23.316682] [<c141fa70>] mutex_lock+0x10/0x20 [ 23.316682] [<f84434d0>] do_gma_backlight_set+0x20/0x40 [gma500_gfx] [ 23.316682] [<f844357f>] gma_backlight_set+0x2f/0x40 [gma500_gfx] [ 23.316682] [<f845261e>] psb_intel_opregion_asle_intr+0xae/0x100 [gma500_gfx] [ 23.316682] [<f8450b87>] psb_irq_handler+0x1a7/0x1b0 [gma500_gfx] [ 23.316682] [<c10bf925>] handle_irq_event_percpu+0x45/0x1f0 [ 23.316682] [<c10bfb01>] handle_irq_event+0x31/0x50 [ 23.316682] [<c10c23ae>] handle_fasteoi_irq+0x4e/0xe0 [ 23.316682] [<c1004c57>] handle_irq+0x77/0x90 [ 23.316682] [<c142908c>] do_IRQ+0x3c/0xb0 [ 23.316682] [<c1428f33>] common_interrupt+0x33/0x38 [ 23.316682] ---[ end trace 713046fbe61b8257 ]---