| commit | 63d55b2aeb5e4faa170316fee73c3c47ea9268c7 | |
| author | Dexuan Cui <decui@microsoft.com> | |
| Tue, 15 Dec 2015 00:01:47 +0000 (14 16:01 -0800) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Tue, 15 Dec 2015 03:15:05 +0000 (14 19:15 -0800) | ||
| tree | 3bbb112423731bce267feff4dd224dfe635dfdda | treesnapshot (tar.gz zip) |
| parent | efc267226b827f347a329c395e16c08973b0e3d6 | commitdiff |
Drivers: hv: vmbus: serialize process_chn_event() and vmbus_close_internal()
process_chn_event(), running in the tasklet, can race with
vmbus_close_internal() in the case of SMP guest, e.g., when the former is
accessing channel->inbound.ring_buffer, the latter could be freeing the
ring_buffer pages.
To resolve the race, we can serialize them by disabling the tasklet when
the latter is running here.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
process_chn_event(), running in the tasklet, can race with
vmbus_close_internal() in the case of SMP guest, e.g., when the former is
accessing channel->inbound.ring_buffer, the latter could be freeing the
ring_buffer pages.
To resolve the race, we can serialize them by disabling the tasklet when
the latter is running here.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/hv/channel.c | diffblobblamehistory |