Public bug reported:
Hey,
when running the haproxy server with splice feature enabled on a high
traffic server, we're getting the following message in the kernel logs
being spammed:
[107728.178357] WARNING: at /build/buildd/linux-3.2.0/net/ipv4/tcp.c:1201
tcp_cleanup_rbuf+0x54/0x120()
[107728.178358] Hardware name: Bochs
[107728.178360] cleanup rbuf bug: copied 4759794E seq 475788CA rcvnxt 4759794E
[107728.178375] Modules linked in: iptable_nat nf_nat nf_conntrack_ipv4
nf_conntrack nf_defrag_ipv4 iptable_filter ip_tables x_tables psmouse serio_raw
virtio_balloon acpiphp floppy
[107728.178383] Pid: 27044, comm: haproxy Tainted: G W
3.2.0-32-virtual #51-Ubuntu
[107728.178385] Call Trace:
[107728.178388] [<ffffffff810659ff>] warn_slowpath_common+0x7f/0xc0
[107728.178391] [<ffffffff81065af6>] warn_slowpath_fmt+0x46/0x50
[107728.178394] [<ffffffff8157f2b4>] tcp_cleanup_rbuf+0x54/0x120
[107728.178396] [<ffffffff815801db>] tcp_recvmsg+0x63b/0xba0
[107728.178399] [<ffffffff815a3f5b>] inet_recvmsg+0x6b/0x80
[107728.178402] [<ffffffff8152424d>] sock_recvmsg+0x11d/0x140
[107728.178404] [<ffffffff8157f2b4>] ? tcp_cleanup_rbuf+0x54/0x120
[107728.178407] [<ffffffff815808f1>] ? tcp_read_sock+0x1b1/0x200
[107728.178409] [<ffffffff81523617>] ? sock_sendpage+0x27/0x30
[107728.178412] [<ffffffff81653df9>] ? _raw_spin_unlock_bh+0x19/0x20
[107728.178415] [<ffffffff815291cd>] ? release_sock+0x6d/0x80
[107728.178417] [<ffffffff81580b33>] ? tcp_splice_read+0x1f3/0x250
[107728.178420] [<ffffffff8152758e>] sys_recvfrom+0xee/0x170
[107728.178423] [<ffffffff8103be79>] ? kvm_clock_get_cycles+0x9/0x10
[107728.178426] [<ffffffff811a3560>] ? sys_splice+0xf0/0x100
[107728.178429] [<ffffffff8165c302>] system_call_fastpath+0x16/0x1b
We're using Ubuntu 12.04 LTS. Is there anything else I can provide you
with to trace this?
/proc/version_signature: Ubuntu 3.2.0-32.51-virtual 3.2.30
Regards :)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1087466
Title:
kernel splice() bug being caused by haproxy
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