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RDMA: hfi1: use rounddown in find_hw_thread_mask()

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num_cores_per_socket is calculated by dividing by
node_affinity.num_online_nodes, but all users of this variable multiply
it by node_affinity.num_online_nodes again. This effectively is the same
as rounding it down by node_affinity.num_online_nodes.

Signed-off-by: Yury Norov [NVIDIA] <yury.norov@gmail.com>
Link: https://patch.msgid.link/20250604193947.11834-6-yury.norov@gmail.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Yury Norov [NVIDIA] 2025-06-04 15:39:41 -04:00 committed by Leon Romanovsky
parent 59ae2e3c6a
commit 4ea9f618d7
1 changed files with 5 additions and 10 deletions
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15
drivers/infiniband/hw/hfi1/affinity.c
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@ -955,27 +955,22 @@ static void find_hw_thread_mask(uint hw_thread_no, cpumask_var_t hw_thread_mask,
struct hfi1_affinity_node_list *affinity)
{
int curr_cpu;
uint num_cores_per_socket;
uint num_cores;
cpumask_copy(hw_thread_mask, &affinity->proc.mask);
if (affinity->num_core_siblings == 0)
return;
num_cores_per_socket = node_affinity.num_online_cpus /
affinity->num_core_siblings /
node_affinity.num_online_nodes;
num_cores = rounddown(node_affinity.num_online_cpus / affinity->num_core_siblings,
node_affinity.num_online_nodes);
/* Removing other siblings not needed for now */
curr_cpu = cpumask_cpumask_nth(num_cores_per_socket *
node_affinity.num_online_nodes, hw_thread_mask) + 1;
curr_cpu = cpumask_nth(num_cores * node_affinity.num_online_nodes, hw_thread_mask) + 1;
cpumask_clear_cpus(hw_thread_mask, curr_cpu, nr_cpu_ids - curr_cpu);
/* Identifying correct HW threads within physical cores */
cpumask_shift_left(hw_thread_mask, hw_thread_mask,
num_cores_per_socket *
node_affinity.num_online_nodes *
hw_thread_no);
cpumask_shift_left(hw_thread_mask, hw_thread_mask, num_cores * hw_thread_no);
}
int hfi1_get_proc_affinity(int node)