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| author | Sameer Wadgaonkar | 2017-05-19 22:17:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2017-05-25 18:53:14 +0200 |
| commit | d36c4857cbaede959e012045711a3467e857e132 (patch) | |
| tree | b85ff90d6f5fb31e217ed0da6d69997d6b4822e1 /drivers/staging/unisys/visorbus/visorchipset.c | |
| parent | staging: unisys: include: renamed structure spar_io_channel_protocol in iocha... (diff) | |
| download | kernel-qcow2-linux-d36c4857cbaede959e012045711a3467e857e132.tar.gz kernel-qcow2-linux-d36c4857cbaede959e012045711a3467e857e132.tar.xz kernel-qcow2-linux-d36c4857cbaede959e012045711a3467e857e132.zip | |
staging: unisys: visorbus: add comment to explain polling logic in controlvm_periodic_work
Added a comment to explain polling frequency variation logic in
controlvm_periodic_logic() in visorchipset.c.
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/unisys/visorbus/visorchipset.c')
| -rw-r--r-- | drivers/staging/unisys/visorbus/visorchipset.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c index c40a3701670a..8438b717b7b6 100644 --- a/drivers/staging/unisys/visorbus/visorchipset.c +++ b/drivers/staging/unisys/visorbus/visorchipset.c @@ -1787,6 +1787,11 @@ controlvm_periodic_work(struct work_struct *work) /* parahotplug_worker */ parahotplug_process_list(); +/* + * The controlvm messages are sent in a bulk. If we start receiving messages, we + * want the polling to be fast. If we do not receive any message for + * MIN_IDLE_SECONDS, we can slow down the polling. + */ schedule_out: if (time_after(jiffies, chipset_dev->most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |