Hello, Libin.
On Mon, Sep 09, 2013 at 01:10:00PM +0800, Libin wrote:
> From: Li Bin <huawei.li...@huawei.com>
>
> In the current implementation, this BUILD_BUG_ON makes no sense.
> First of all, the number of worker pools needed cannot be determined
> at compile time, because the number of backing pools for UNBOUND
> workqueues is dynamic based on the assigned custom attributes.
> Secondly, it should use WORK_OFFQ_POOL_BITS instead of
> (BITS_PER_LONG - WORK_OFFQ_POOL_SHIFT).
>
> Signed-off-by: Li Bin <huawei.li...@huawei.com>
> ---
> kernel/workqueue.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/kernel/workqueue.c b/kernel/workqueue.c
> index 987293d..41019b1 100644
> --- a/kernel/workqueue.c
> +++ b/kernel/workqueue.c
> @@ -5009,10 +5009,6 @@ static int __init init_workqueues(void)
> int std_nice[NR_STD_WORKER_POOLS] = { 0, HIGHPRI_NICE_LEVEL };
> int i, cpu;
>
> - /* make sure we have enough bits for OFFQ pool ID */
> - BUILD_BUG_ON((1LU << (BITS_PER_LONG - WORK_OFFQ_POOL_SHIFT)) <
> - WORK_CPU_END * NR_STD_WORKER_POOLS);
> -
Indeed, but can you please update worker_pool_assign_id() so that it
doesn't allocate ids >= WORK_OFFQ_POOL_NONE?
Thanks.
--
tejun
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