lkml.org 
[lkml]   [2009]   [May]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] use round_jiffies() for slow work thread pool's 5 second cull timer
Chris Peterson wrote:
> The slow work thread pool culls its idle threads after 5 seconds without any work requests. Also, the slow work thread pool waits 5 seconds before starting new threads after OOM.
>
> This patch uses round_jiffies() to round these 5 second timers to whole seconds. In this case, the actual timer wait would be between 4.75 and 5.75 seconds (because round_jiffies() rounds < 0.25 seconds down and > 0.25 seconds up). This patch also refactors the mod_timer() logic into a separate helper function.
>
> Signed-off-by: Chris Peterson <cpeterso@cpeterso.com>
> ---
> diff --git a/kernel/slow-work.c b/kernel/slow-work.c
> index b28d191..9bfcb53 100644
> --- a/kernel/slow-work.c
> +++ b/kernel/slow-work.c
> @@ -318,6 +318,12 @@ cant_get_ref:
> }
> EXPORT_SYMBOL(slow_work_enqueue);
>
> +static void slow_work_defer_cull_time(void)
> +{
> + mod_timer(&slow_work_cull_timer,
> + round_jiffies_relative(SLOW_WORK_CULL_TIMEOUT));
> +}
> +
Hi Chris,

Doesn't mod_timer take an absolute time not a relative one?

So I think this should be

mod_timer(&timer,round_jiffies(jiffies + TIMEOUT) );

regards

Richard



\
 
 \ /
  Last update: 2009-05-10 16:25    [from the cache]
©2003-2011 Jasper Spaans