Re: linux-next: Tree for Jul 7 (scsi/lpfc/lpfc_init.c)

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On 7/7/2020 10:09 AM, Randy Dunlap wrote:
On 7/7/20 1:08 AM, Stephen Rothwell wrote:
Hi all,

Changes since 20200706:

on i386:

when CONFIG_ACPI is not set/enabled:


../drivers/scsi/lpfc/lpfc_init.c:1265:15: error: implicit declaration of function 'get_cpu_idle_time'; did you mean 'get_cpu_device'? [-Werror=implicit-function-declaration]


The cpufreq people want justification for using
get_cpu_idle_time().  Please see
https://lore.kernel.org/linux-scsi/20200707030943.xkocccy6qy2c3hrx@vireshk-i7/




The driver is using cpu utilization in order to choose between softirq or work queues in handling an interrupt. Less-utilized, softirq is used. higher utilized, work queue is used.  The utilization is checked periodically via a heartbeat.

-- james




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