diff options
| author | Sultan Alsawaf <sultan@kerneltoast.com> | 2019-02-02 14:13:03 -0800 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2019-02-03 18:27:33 +0100 |
| commit | 75f476905a1bcd013c8bee07282fd7fb1dca738e (patch) | |
| tree | 987fcd2a85f2afe63f0da292826646192bfb8eec /src/selftest | |
| parent | d063dfb80911854ed273f6374b02f339a86462ba (diff) | |
hashtables: decouple hashtable allocations from the main device allocation
The hashtable allocations are quite large, and cause the device allocation in
the net framework to stall sometimes while it tries to find a contiguous region
that can fit the device struct:
[<0000000000000000>] __switch_to+0x94/0xb8
[<0000000000000000>] __alloc_pages_nodemask+0x764/0x7e8
[<0000000000000000>] kmalloc_order+0x20/0x40
[<0000000000000000>] __kmalloc+0x144/0x1a0
[<0000000000000000>] alloc_netdev_mqs+0x5c/0x368
[<0000000000000000>] rtnl_create_link+0x48/0x180
[<0000000000000000>] rtnl_newlink+0x410/0x708
[<0000000000000000>] rtnetlink_rcv_msg+0x190/0x1f8
[<0000000000000000>] netlink_rcv_skb+0x4c/0xf8
[<0000000000000000>] rtnetlink_rcv+0x30/0x40
[<0000000000000000>] netlink_unicast+0x18c/0x208
[<0000000000000000>] netlink_sendmsg+0x19c/0x348
[<0000000000000000>] sock_sendmsg+0x3c/0x58
[<0000000000000000>] ___sys_sendmsg+0x290/0x2b0
[<0000000000000000>] __sys_sendmsg+0x58/0xa0
[<0000000000000000>] SyS_sendmsg+0x10/0x20
[<0000000000000000>] el0_svc_naked+0x34/0x38
[<0000000000000000>] 0xffffffffffffffff
To fix the allocation stalls, decouple the hashtable allocations from the device
allocation and allocate the hashtables with kvmalloc's implicit __GFP_NORETRY
so that the allocations fall back to vmalloc with little resistance.
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/selftest')
0 files changed, 0 insertions, 0 deletions