Messages in this thread | | | Date | Wed, 23 May 2018 12:40:29 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH v2 1/1] drivers core: multi-threading device shutdown |
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Hi!
> When system is rebooted, halted or kexeced device_shutdown() is > called. > > This function shuts down every single device by calling either: > > dev->bus->shutdown(dev) > dev->driver->shutdown(dev) ... > Finally, with ixgbe_shutdown() it takes 0.37 for each device, but that time > is spread all over the place, with bigger offenders: > > ixgbe_shutdown > __ixgbe_shutdown > ixgbe_close_suspend > ixgbe_down > ixgbe_init_hw_generic > ixgbe_reset_hw_X540 > msleep(100); 0.104483472 > ixgbe_get_san_mac_addr_generic 0.048414851 > ixgbe_get_wwn_prefix_generic 0.048409893 > ixgbe_start_hw_X540 > ixgbe_start_hw_generic > ixgbe_clear_hw_cntrs_generic 0.048581502 > ixgbe_setup_fc_generic 0.024225800
ixgbe is network card, right? So ... it does not have any persistent state and no moving parts, and there's no reason we could not "just power it down"? > /*
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