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Date: Wed, 23 Oct 2013 19:20:24 +0800 From: Xiong Zhou <jencce.kernel@...il.com> To: Fengguang Wu <fengguang.wu@...el.com> Cc: Russell King - ARM Linux <linux@....linux.org.uk>, Dave Airlie <airlied@...ux.ie>, Linus Torvalds <torvalds@...ux-foundation.org>, xen-devel@...ts.xenproject.org, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: Re: [xen] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC How is this going? regards, 2013/10/11 Fengguang Wu <fengguang.wu@...el.com>: >> I think something like the below may address the issue - I've only build >> tested this so far. >> >> We have another case where DRM does the wrong thing here too - a similar >> thing goes on with connectors as well. I've not yet looked into this, >> but I'll take a look later today. >> >> Fengguang - could you give this some runs through your marvellous test >> system and see whether it fixes the problem you're seeing please? > > Russell, I applied the patch (as commit 17e57131d4c2) on top of > v3.12-rc4 and here are the test results for the kernels with > > CONFIG_DRM=y > CONFIG_DEBUG_KOBJECT_RELEASE=y > > As you may see, it's pure improvements. :) > > Tested-by: Fengguang Wu <fengguang.wu@...el.com> > > > i386-randconfig-c3-1009 > > +---------------------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +---------------------------------------------------------------+-----------+--------------+ > | has_kernel_error_warning | 63 | | > | BUG:kernel_early_hang_without_any_printk_output | 7 | | > | WARNING:CPU:PID:at_fs/sysfs/dir.c:sysfs_add_one() | 56 | | > | WARNING:CPU:PID:at_lib/kobject.c:kobject_add_internal() | 56 | | > | WARNING:CPU:PID:at_drivers/base/driver.c:driver_unregister() | 56 | | > | WARNING:CPU:PID:at_lib/debugobjects.c:debug_print_object() | 56 | | > | INFO:trying_to_register_non-static_key | 56 | | > | BUG:unable_to_handle_kernel_NULL_pointer_dereference_at(null) | 56 | | > | Oops:PREEMPT_SMP | 56 | | > | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 56 | | > | BUG:kernel_boot_oops | 56 | | > | good_boots | 0 | 9 | > +---------------------------------------------------------------+-----------+--------------+ > > x86_64-randconfig-j5-1009 > > +------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +------------+-----------+--------------+ > | good_boots | 30 | 9 | > +------------+-----------+--------------+ > > x86_64-randconfig-j3-1009 > > +---------------------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +---------------------------------------------------------------+-----------+--------------+ > | has_kernel_error_warning | 60 | | > | WARNING:CPU:PID:at_fs/sysfs/dir.c:sysfs_add_one() | 60 | | > | WARNING:CPU:PID:at_lib/kobject.c:kobject_add_internal() | 60 | | > | WARNING:CPU:PID:at_drivers/base/driver.c:driver_unregister() | 60 | | > | WARNING:CPU:PID:at_lib/debugobjects.c:debug_print_object() | 60 | | > | WARNING:CPU:PID:at_arch/x86/kernel/irq_64.c:handle_irq() | 3 | | > | BUG:unable_to_handle_kernel_NULL_pointer_dereference_at | 59 | | > | Oops:DEBUG_PAGEALLOC | 28 | | > | WARNING:CPU:PID:at_lib/list_debug.c:__list_del_entry() | 28 | | > | BUG:scheduling_while_atomic | 30 | | > | INFO:lockdep_is_turned_off | 30 | | > | BUG:unable_to_handle_kernel_paging_request_at | 55 | | > | kernel_BUG_at_kernel/smpboot.c | 13 | | > | invalid_opcode:DEBUG_PAGEALLOC | 13 | | > | general_protection_fault:DEBUG_PAGEALLOC | 2 | | > | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 4 | | > | BUG:kernel_boot_oops | 60 | | > | WARNING:CPU:PID:at_kernel/workqueue.c:work_fixup_activate() | 24 | | > | WARNING:CPU:PID:at_kernel/workqueue.c:__queue_work() | 10 | | > | BUG:unable_to_handle_kernel_NULL_pointer_dereference_at(null) | 2 | | > | BUG:unable_to_handle_kernel | 1 | | > | BUG:unable_to_handle_kernel_NULL_point | 1 | | > | BUG:unable_to_handle_kernel_NULL_pointer_dereference | 4 | | > | BUG:unable_to_handle_kernel_NULL_pointer_derefe | 1 | | > | BUG:unable_to_handle_kernel_NULL_pointer_de | 1 | | > | BUG:un | 1 | | > | good_boots | 0 | 9 | > +---------------------------------------------------------------+-----------+--------------+ > > x86_64-randconfig-j1-1009 > > +-------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +-------------------------------------------------+-----------+--------------+ > | has_kernel_error_warning | 60 | 9 | > | BUG:kernel_early_hang_without_any_printk_output | 60 | 9 | > +-------------------------------------------------+-----------+--------------+ > > x86_64-randconfig-j0-1009 > > +--------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +--------------------------+-----------+--------------+ > | good_boots | 56 | 9 | > | has_kernel_error_warning | 4 | | > | BUG:kernel_test_crashed | 4 | | > +--------------------------+-----------+--------------+ > > x86_64-randconfig-a2-1009 > > +------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +------------+-----------+--------------+ > | good_boots | 3 | 9 | > +------------+-----------+--------------+ > > x86_64-randconfig-c9-1009 > > +------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +------------+-----------+--------------+ > | good_boots | 33 | 9 | > +------------+-----------+--------------+ > > x86_64-randconfig-c3-1009 > > +-------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +-------------------------------------------------+-----------+--------------+ > | good_boots | 58 | 8 | > | has_kernel_error_warning | 5 | 1 | > | BUG:kernel_early_hang_without_any_printk_output | 5 | 1 | > +-------------------------------------------------+-----------+--------------+ > > i386-randconfig-r4-1009 > > +--------------------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +--------------------------------------------------------------+-----------+--------------+ > | has_kernel_error_warning | 63 | | > | WARNING:CPU:PID:at_fs/sysfs/dir.c:sysfs_add_one() | 63 | | > | WARNING:CPU:PID:at_lib/kobject.c:kobject_add_internal() | 63 | | > | WARNING:CPU:PID:at_drivers/base/driver.c:driver_unregister() | 63 | | > | WARNING:CPU:PID:at_lib/debugobjects.c:debug_print_object() | 63 | | > | INFO:trying_to_register_non-static_key | 63 | | > | kernel_BUG_at_kernel/timer.c | 63 | | > | invalid_opcode:SMP | 63 | | > | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 63 | | > | BUG:kernel_boot_oops | 63 | | > | good_boots | 0 | 9 | > +--------------------------------------------------------------+-----------+--------------+ > > i386-randconfig-r3-1009 > > +------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +------------+-----------+--------------+ > | good_boots | 3 | 9 | > +------------+-----------+--------------+ > > i386-randconfig-r1-1009 > > +-------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +-------------------------------------------------+-----------+--------------+ > | has_kernel_error_warning | 63 | 9 | > | BUG:kernel_early_hang_without_any_printk_output | 63 | 9 | > +-------------------------------------------------+-----------+--------------+ > > i386-randconfig-x2-1009 > > +------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +------------+-----------+--------------+ > | good_boots | 3 | 9 | > +------------+-----------+--------------+ > > i386-randconfig-i008-1008 > > +-------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +-------------------------------------------------+-----------+--------------+ > | has_kernel_error_warning | 60 | 9 | > | BUG:kernel_early_hang_without_any_printk_output | 60 | 9 | > +-------------------------------------------------+-----------+--------------+ > > x86_64-randconfig-x1-1009 > > +---------------------------------------------------------------+-----------+--------------+ > | | v3.12-rc4 | 17e57131d4c2 | > +---------------------------------------------------------------+-----------+--------------+ > | has_kernel_error_warning | 63 | | > | WARNING:CPU:PID:at_fs/sysfs/dir.c:sysfs_add_one() | 63 | | > | WARNING:CPU:PID:at_lib/kobject.c:kobject_add_internal() | 63 | | > | WARNING:CPU:PID:at_drivers/base/driver.c:driver_unregister() | 63 | | > | BUG:unable_to_handle_kernel_NULL_pointer_dereference_at(null) | 63 | | > | Oops | 63 | | > | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 63 | | > | BUG:kernel_boot_oops | 63 | | > | INFO:trying_to_register_non-static_key | 2 | | > | good_boots | 0 | 9 | > +---------------------------------------------------------------+-----------+--------------+ > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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