diff options
| author | Li RongQing <lirongqing@baidu.com> | 2023-11-15 20:01:08 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-11-18 20:18:25 -0800 |
| commit | ac40916a3f7243efbe6e129ebf495b5c33a3adfe (patch) | |
| tree | 24fca7c5af4b6c8823c8363066ce98438a226b32 /net/netlink/af_netlink.c | |
| parent | 459a70bae4009b7a326daf38f27d9fd3ffd79531 (diff) | |
rtnetlink: introduce nlmsg_new_large and use it in rtnl_getlink
if a PF has 256 or more VFs, ip link command will allocate an order 3
memory or more, and maybe trigger OOM due to memory fragment,
the VFs needed memory size is computed in rtnl_vfinfo_size.
so introduce nlmsg_new_large which calls netlink_alloc_large_skb in
which vmalloc is used for large memory, to avoid the failure of
allocating memory
ip invoked oom-killer: gfp_mask=0xc2cc0(GFP_KERNEL|__GFP_NOWARN|\
__GFP_COMP|__GFP_NOMEMALLOC), order=3, oom_score_adj=0
CPU: 74 PID: 204414 Comm: ip Kdump: loaded Tainted: P OE
Call Trace:
dump_stack+0x57/0x6a
dump_header+0x4a/0x210
oom_kill_process+0xe4/0x140
out_of_memory+0x3e8/0x790
__alloc_pages_slowpath.constprop.116+0x953/0xc50
__alloc_pages_nodemask+0x2af/0x310
kmalloc_large_node+0x38/0xf0
__kmalloc_node_track_caller+0x417/0x4d0
__kmalloc_reserve.isra.61+0x2e/0x80
__alloc_skb+0x82/0x1c0
rtnl_getlink+0x24f/0x370
rtnetlink_rcv_msg+0x12c/0x350
netlink_rcv_skb+0x50/0x100
netlink_unicast+0x1b2/0x280
netlink_sendmsg+0x355/0x4a0
sock_sendmsg+0x5b/0x60
____sys_sendmsg+0x1ea/0x250
___sys_sendmsg+0x88/0xd0
__sys_sendmsg+0x5e/0xa0
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f95a65a5b70
Cc: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Link: https://lore.kernel.org/r/20231115120108.3711-1-lirongqing@baidu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/netlink/af_netlink.c')
| -rw-r--r-- | net/netlink/af_netlink.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index eb086b06d60d..177126fb0484 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1204,8 +1204,7 @@ struct sock *netlink_getsockbyfilp(struct file *filp) return sock; } -static struct sk_buff *netlink_alloc_large_skb(unsigned int size, - int broadcast) +struct sk_buff *netlink_alloc_large_skb(unsigned int size, int broadcast) { struct sk_buff *skb; void *data; |