Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> writes: > 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. It seems that newly introduced clockevent device (Drivers: hv: vmbus: Implement a clockevent device) makes it impossible to unload hv_vmbus module: # rmmod hv_vmbus rmmod hv_vmbus rmmod: ERROR: Module hv_vmbus is in use I'll try investigating before sending v2 without PATCH 2/3. > > 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(-) -- Vitaly _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
