| Message ID | 20210719214834.125484-1-john.fastabend@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | sockmap fixes picked up by stress tests | expand |
On Mon, Jul 19, 2021 at 11:48 PM CEST, John Fastabend wrote: > Running stress tests with recent patch to remove an extra lock in sockmap > resulted in a couple new issues popping up. It seems only one of them > is actually related to the patch: > > 799aa7f98d53 ("skmsg: Avoid lock_sock() in sk_psock_backlog()") > > The other two issues had existed long before, but I guess the timing > with the serialization we had before was too tight to get any of > our tests or deployments to hit it. > > With attached series stress testing sockmap+TCP with workloads that > create lots of short-lived connections no more splats like below were > seen on upstream bpf branch. > > [224913.935822] WARNING: CPU: 3 PID: 32100 at net/core/stream.c:208 sk_stream_kill_queues+0x212/0x220 > [224913.935841] Modules linked in: fuse overlay bpf_preload x86_pkg_temp_thermal intel_uncore wmi_bmof squashfs sch_fq_codel efivarfs ip_tables x_tables uas xhci_pci ixgbe mdio xfrm_algo xhci_hcd wmi > [224913.935897] CPU: 3 PID: 32100 Comm: fgs-bench Tainted: G I 5.14.0-rc1alu+ #181 > [224913.935908] Hardware name: Dell Inc. Precision 5820 Tower/002KVM, BIOS 1.9.2 01/24/2019 > [224913.935914] RIP: 0010:sk_stream_kill_queues+0x212/0x220 > [224913.935923] Code: 8b 83 20 02 00 00 85 c0 75 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 89 df e8 2b 11 fe ff eb c3 0f 0b e9 7c ff ff ff 0f 0b eb ce <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f c3 90 0f 1f 44 00 00 41 57 41 > [224913.935932] RSP: 0018:ffff88816271fd38 EFLAGS: 00010206 > [224913.935941] RAX: 0000000000000ae8 RBX: ffff88815acd5240 RCX: dffffc0000000000 > [224913.935948] RDX: 0000000000000003 RSI: 0000000000000ae8 RDI: ffff88815acd5460 > [224913.935954] RBP: ffff88815acd5460 R08: ffffffff955c0ae8 R09: fffffbfff2e6f543 > [224913.935961] R10: ffffffff9737aa17 R11: fffffbfff2e6f542 R12: ffff88815acd5390 > [224913.935967] R13: ffff88815acd5480 R14: ffffffff98d0c080 R15: ffffffff96267500 > [224913.935974] FS: 00007f86e6bd1700(0000) GS:ffff888451cc0000(0000) knlGS:0000000000000000 > [224913.935981] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [224913.935988] CR2: 000000c0008eb000 CR3: 00000001020e0005 CR4: 00000000003706e0 > [224913.935994] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [224913.936000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > [224913.936007] Call Trace: > [224913.936016] inet_csk_destroy_sock+0xba/0x1f0 > [224913.936033] __tcp_close+0x620/0x790 > [224913.936047] tcp_close+0x20/0x80 > [224913.936056] inet_release+0x8f/0xf0 > [224913.936070] __sock_release+0x72/0x120 > > John Fastabend (3): > bpf, sockmap: zap ingress queues after stopping strparser > bpf, sockmap: on cleanup we additionally need to remove cached skb > bpf, sockmap: fix memleak on ingress msg enqueue > > include/linux/skmsg.h | 54 ++++++++++++++++++++++++++++--------------- > net/core/skmsg.c | 37 +++++++++++++++++++++-------- > 2 files changed, 62 insertions(+), 29 deletions(-) Except for the uninitialized memory read reported by 0-day CI, this series LGTM. Feel free to add my stamp to v2: Acked-by: Jakub Sitnicki <jakub@cloudflare.com>
Running stress tests with recent patch to remove an extra lock in sockmap resulted in a couple new issues popping up. It seems only one of them is actually related to the patch: 799aa7f98d53 ("skmsg: Avoid lock_sock() in sk_psock_backlog()") The other two issues had existed long before, but I guess the timing with the serialization we had before was too tight to get any of our tests or deployments to hit it. With attached series stress testing sockmap+TCP with workloads that create lots of short-lived connections no more splats like below were seen on upstream bpf branch. [224913.935822] WARNING: CPU: 3 PID: 32100 at net/core/stream.c:208 sk_stream_kill_queues+0x212/0x220 [224913.935841] Modules linked in: fuse overlay bpf_preload x86_pkg_temp_thermal intel_uncore wmi_bmof squashfs sch_fq_codel efivarfs ip_tables x_tables uas xhci_pci ixgbe mdio xfrm_algo xhci_hcd wmi [224913.935897] CPU: 3 PID: 32100 Comm: fgs-bench Tainted: G I 5.14.0-rc1alu+ #181 [224913.935908] Hardware name: Dell Inc. Precision 5820 Tower/002KVM, BIOS 1.9.2 01/24/2019 [224913.935914] RIP: 0010:sk_stream_kill_queues+0x212/0x220 [224913.935923] Code: 8b 83 20 02 00 00 85 c0 75 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 89 df e8 2b 11 fe ff eb c3 0f 0b e9 7c ff ff ff 0f 0b eb ce <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f c3 90 0f 1f 44 00 00 41 57 41 [224913.935932] RSP: 0018:ffff88816271fd38 EFLAGS: 00010206 [224913.935941] RAX: 0000000000000ae8 RBX: ffff88815acd5240 RCX: dffffc0000000000 [224913.935948] RDX: 0000000000000003 RSI: 0000000000000ae8 RDI: ffff88815acd5460 [224913.935954] RBP: ffff88815acd5460 R08: ffffffff955c0ae8 R09: fffffbfff2e6f543 [224913.935961] R10: ffffffff9737aa17 R11: fffffbfff2e6f542 R12: ffff88815acd5390 [224913.935967] R13: ffff88815acd5480 R14: ffffffff98d0c080 R15: ffffffff96267500 [224913.935974] FS: 00007f86e6bd1700(0000) GS:ffff888451cc0000(0000) knlGS:0000000000000000 [224913.935981] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [224913.935988] CR2: 000000c0008eb000 CR3: 00000001020e0005 CR4: 00000000003706e0 [224913.935994] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [224913.936000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [224913.936007] Call Trace: [224913.936016] inet_csk_destroy_sock+0xba/0x1f0 [224913.936033] __tcp_close+0x620/0x790 [224913.936047] tcp_close+0x20/0x80 [224913.936056] inet_release+0x8f/0xf0 [224913.936070] __sock_release+0x72/0x120 John Fastabend (3): bpf, sockmap: zap ingress queues after stopping strparser bpf, sockmap: on cleanup we additionally need to remove cached skb bpf, sockmap: fix memleak on ingress msg enqueue include/linux/skmsg.h | 54 ++++++++++++++++++++++++++++--------------- net/core/skmsg.c | 37 +++++++++++++++++++++-------- 2 files changed, 62 insertions(+), 29 deletions(-)