From: Jian Wen wenjianhn@gmail.com
[ Upstream commit 730fffce4fd2eb7a0be2d0b6cd7e55e9194d76d5 ]
During live migration of a virtual machine, the SR-IOV VF need to be re-registered. It may fail when the memory is badly fragmented.
The related log is as follows.
kernel: hv_netvsc 6045bdaa-c0d1-6045-bdaa-c0d16045bdaa eth0: VF slot 1 added ... kernel: kworker/0:0: page allocation failure: order:7, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null),cpuset=/,mems_allowed=0 kernel: CPU: 0 PID: 24006 Comm: kworker/0:0 Tainted: G E 5.4...x86_64 #1 kernel: Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090008 12/07/2018 kernel: Workqueue: events work_for_cpu_fn kernel: Call Trace: kernel: dump_stack+0x8b/0xc8 kernel: warn_alloc+0xff/0x170 kernel: __alloc_pages_slowpath+0x92c/0xb2b kernel: ? get_page_from_freelist+0x1d4/0x1140 kernel: __alloc_pages_nodemask+0x2f9/0x320 kernel: alloc_pages_current+0x6a/0xb0 kernel: kmalloc_order+0x1e/0x70 kernel: kmalloc_order_trace+0x26/0xb0 kernel: ? __switch_to_asm+0x34/0x70 kernel: __kmalloc+0x276/0x280 kernel: ? _raw_spin_unlock_irqrestore+0x1e/0x40 kernel: devlink_alloc+0x29/0x110 kernel: mlx5_devlink_alloc+0x1a/0x20 [mlx5_core] kernel: init_one+0x1d/0x650 [mlx5_core] kernel: local_pci_probe+0x46/0x90 kernel: work_for_cpu_fn+0x1a/0x30 kernel: process_one_work+0x16d/0x390 kernel: worker_thread+0x1d3/0x3f0 kernel: kthread+0x105/0x140 kernel: ? max_active_store+0x80/0x80 kernel: ? kthread_bind+0x20/0x20 kernel: ret_from_fork+0x3a/0x50
Signed-off-by: Jian Wen wenjian1@xiaomi.com Link: https://lore.kernel.org/r/20240327082128.942818-1-wenjian1@xiaomi.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/devlink/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/devlink/core.c b/net/devlink/core.c index 7f0b093208d75..f49cd83f1955f 100644 --- a/net/devlink/core.c +++ b/net/devlink/core.c @@ -314,7 +314,7 @@ static void devlink_release(struct work_struct *work) mutex_destroy(&devlink->lock); lockdep_unregister_key(&devlink->lock_key); put_device(devlink->dev); - kfree(devlink); + kvfree(devlink); }
void devlink_put(struct devlink *devlink) @@ -420,7 +420,7 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops, if (!devlink_reload_actions_valid(ops)) return NULL;
- devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL); + devlink = kvzalloc(struct_size(devlink, priv, priv_size), GFP_KERNEL); if (!devlink) return NULL;
@@ -455,7 +455,7 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops, return devlink;
err_xa_alloc: - kfree(devlink); + kvfree(devlink); return NULL; } EXPORT_SYMBOL_GPL(devlink_alloc_ns);