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* [PATCH 0/3] Drivers: hv: vmbus: fix crashes on hv_vmbus load/unload path
@ 2015-01-21 19:02 Vitaly Kuznetsov
  2015-01-21 19:02 ` [PATCH 1/3] Drivers: hv: vmbus: avoid double kfree for device_obj Vitaly Kuznetsov
                   ` (3 more replies)
  0 siblings, 4 replies; 9+ messages in thread
From: Vitaly Kuznetsov @ 2015-01-21 19:02 UTC (permalink / raw)
  To: K. Y. Srinivasan, devel; +Cc: Haiyang Zhang, linux-kernel, Dexuan Cui

It is possible (since 93e5bd06a953: "Drivers: hv: Make the vmbus driver
unloadable") to unload hv_vmbus driver if no other devices are connected.
1aec169673d7: "x86: Hyperv: Cleanup the irq mess" fixed doulble interrupt
gate setup. However, if we try to unload hv_vmbus and then load it back
crashes in different places of vmbus driver occur on both unload and second
load paths. Address those I saw in my testing.

Not everything is fixed though. MCE was hit once on Generation2 instance and
I neither understand what caused it nor do I know the way to reproduce it.
Anyway, here is the log:

[  204.846255] mce: [Hardware Error]: CPU 0: Machine Check Exception: 4 Bank 0: b2000000c0020001
[  204.846675] mce: [Hardware Error]: TSC 6b5cd64bc8 
[  204.846675] mce: [Hardware Error]: PROCESSOR 0:306e4 TIME 1421944123 SOCKET 0 APIC 0 microcode ffffffff
[  204.846675] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
[  204.846675] mce: [Hardware Error]: Machine check: Processor context corrupt
[  204.846675] Kernel panic - not syncing: Fatal Machine check
[  204.846675] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff)
[  204.846675] Rebooting in 30 seconds..
[  204.846675] ACPI MEMORY or I/O RESET_REG.

Vitaly Kuznetsov (3):
  Drivers: hv: vmbus: avoid double kfree for device_obj
  Drivers: hv: vmbus: introduce vmbus_acpi_remove
  Drivers: hv: vmbus: teardown hv_vmbus_con workqueue and
    vmbus_connection pages on shutdown

 drivers/hv/channel_mgmt.c |  1 -
 drivers/hv/connection.c   | 17 ++++++++++++-----
 drivers/hv/hyperv_vmbus.h |  1 +
 drivers/hv/vmbus_drv.c    | 16 ++++++++++++++++
 4 files changed, 29 insertions(+), 6 deletions(-)

-- 
1.9.3


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2015-04-10 14:50 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-01-21 19:02 [PATCH 0/3] Drivers: hv: vmbus: fix crashes on hv_vmbus load/unload path Vitaly Kuznetsov
2015-01-21 19:02 ` [PATCH 1/3] Drivers: hv: vmbus: avoid double kfree for device_obj Vitaly Kuznetsov
2015-01-21 19:02 ` [PATCH 2/3] Drivers: hv: vmbus: introduce vmbus_acpi_remove Vitaly Kuznetsov
2015-01-22 19:08   ` KY Srinivasan
2015-01-23 10:01     ` Vitaly Kuznetsov
2015-04-10 12:47     ` Vitaly Kuznetsov
2015-04-10 14:50       ` KY Srinivasan
2015-01-21 19:02 ` [PATCH 3/3] Drivers: hv: vmbus: teardown hv_vmbus_con workqueue and vmbus_connection pages on shutdown Vitaly Kuznetsov
2015-01-26 13:41 ` [PATCH 0/3] Drivers: hv: vmbus: fix crashes on hv_vmbus load/unload path Vitaly Kuznetsov

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