[lkml]   [2022]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[GIT pull] irq/urgent for v5.18-rc3

please pull the latest irq/urgent branch from:

git:// irq-urgent-2022-04-17

up to: 08d835dff916: genirq/affinity: Consider that CPUs on nodes can be unbalanced

A single fix for the interrupt affinity spreading logic to take into
account that there can be an imbalance between present and possible CPUs,
which causes already assigned bits to be overwritten.



Rei Yamamoto (1):
genirq/affinity: Consider that CPUs on nodes can be unbalanced

kernel/irq/affinity.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
index f7ff8919dc9b..fdf170404650 100644
--- a/kernel/irq/affinity.c
+++ b/kernel/irq/affinity.c
@@ -269,8 +269,9 @@ static int __irq_build_affinity_masks(unsigned int startvec,
if (numvecs <= nodes) {
for_each_node_mask(n, nodemsk) {
- cpumask_or(&masks[curvec].mask, &masks[curvec].mask,
- node_to_cpumask[n]);
+ /* Ensure that only CPUs which are in both masks are set */
+ cpumask_and(nmsk, cpu_mask, node_to_cpumask[n]);
+ cpumask_or(&masks[curvec].mask, &masks[curvec].mask, nmsk);
if (++curvec == last_affv)
curvec = firstvec;
 \ /
  Last update: 2022-04-17 11:59    [W:0.046 / U:1.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site