LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: "K. Y. Srinivasan" <kys@microsoft.com>, devel@linuxdriverproject.org
Cc: Haiyang Zhang <haiyangz@microsoft.com>,
	linux-kernel@vger.kernel.org, Dexuan Cui <decui@microsoft.com>
Subject: [PATCH 0/3] Drivers: hv: vmbus: fix crashes on hv_vmbus load/unload path
Date: Wed, 21 Jan 2015 20:02:06 +0100	[thread overview]
Message-ID: <1421866929-20167-1-git-send-email-vkuznets@redhat.com> (raw)

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


             reply	other threads:[~2015-01-21 19:02 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-21 19:02 Vitaly Kuznetsov [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1421866929-20167-1-git-send-email-vkuznets@redhat.com \
    --to=vkuznets@redhat.com \
    --cc=decui@microsoft.com \
    --cc=devel@linuxdriverproject.org \
    --cc=haiyangz@microsoft.com \
    --cc=kys@microsoft.com \
    --cc=linux-kernel@vger.kernel.org \
    --subject='Re: [PATCH 0/3] Drivers: hv: vmbus: fix crashes on hv_vmbus load/unload path' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).