netdev - Re: [PATCH 2/3] enic: add main netdev file withmoduleinfrastructure

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Date:	Wed, 17 Sep 2008 11:51:50 -0700 (PDT)
From:	Scott Feldman <scofeldm@...co.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
cc:	Scott Feldman <scofeldm@...co.com>, netdev@...r.kernel.org
Subject: Re: [PATCH 2/3] enic: add main netdev file withmoduleinfrastructure

On Wed, 17 Sep 2008, Ben Hutchings wrote:

> On Tue, 2008-09-16 at 18:49 -0700, Scott Feldman wrote:
>>>> +static void enic_notify_timer(unsigned long data)
>>>> +{
>>>> +	struct enic *enic = (struct enic *)data;
>>>> +
>>>> +	enic_notify_check(enic);
>>>> +
>>>> +	mod_timer(&enic->notify_timer, round_jiffies(ENIC_NOTIFY_TIMER_PERIOD));
>>>
>>> You want round_jiffies_relative() not round_jiffies().
>>
>> No, I want round_jiffies().
> [...]
>
> The kernel-doc says:
> "round_jiffies() rounds an absolute time in the future (in jiffies)
> up or down to (approximately) full seconds. This is useful for timers
> for which the exact time they fire does not matter too much, as long as
> they fire approximately every X seconds."
>
> You're passing in ENIC_NOTIFY_TIMER_PERIOD which is a relative time.

I tried both and round_jiffies(2) gave the desired result of calling the timer
every two seconds.  Using round_jiffies_relative(2) called the timer
continuously.

-scott
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