ARM64/KVM: Bad page state in process iperf
From: Bhushan Bharat
Date: Mon Dec 14 2015 - 22:46:14 EST
Hi All,
I am running "iperf" in KVM guest on ARM64 machine and observing below crash.
=============================
$iperf -c 3.3.3.3 -P 4 -t 0 -i 5 -w 90k
------------------------------------------------------------
Client connecting to 3.3.3.3, TCP port 5001
TCP window size: 180 KByte (WARNING: requested 90.0 KByte)
------------------------------------------------------------
[ 3] local 3.3.3.1 port 51131 connected with 3.3.3.3 port 5001
[ 6] local 3.3.3.1 port 51134 connected with 3.3.3.3 port 5001
[ 5] local 3.3.3.1 port 51133 connected with 3.3.3.3 port 5001
[ 4] local 3.3.3.1 port 51132 connected with 3.3.3.3 port 5001
[ 53.088567] random: nonblocking pool is initialized
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 5.0 sec 638 MBytes 1.07 Gbits/sec
[ 4] 35.0-40.0 sec 1.66 GBytes 2.85 Gbits/sec
[ 5] 40.0-45.0 sec 1.11 GBytes 1.90 Gbits/sec
[ 4] 40.0-45.0 sec 1.16 GBytes 1.99 Gbits/sec
[ 98.895207] BUG: Bad page state in process iperf pfn:0a584
[ 98.896164] page:ffff780000296100 count:-1 mapcount:0 mapping: (null) index:0x0
[ 98.897436] flags: 0x0()
[ 98.897885] page dumped because: nonzero _count
[ 98.898640] Modules linked in:
[ 98.899178] CPU: 0 PID: 1639 Comm: iperf Not tainted 4.1.8-00461-ge5431ad #141
[ 98.900302] Hardware name: linux,dummy-virt (DT)
[ 98.901014] Call trace:
[ 98.901406] [<ffff800000096cac>] dump_backtrace+0x0/0x12c
[ 98.902522] [<ffff800000096de8>] show_stack+0x10/0x1c
[ 98.903441] [<ffff800000678dc8>] dump_stack+0x8c/0xdc
[ 98.904202] [<ffff800000145480>] bad_page+0xc4/0x114
[ 98.904945] [<ffff8000001487a4>] get_page_from_freelist+0x590/0x63c
[ 98.905871] [<ffff80000014893c>] __alloc_pages_nodemask+0xec/0x794
[ 98.906791] [<ffff80000059fc80>] skb_page_frag_refill+0x70/0xa8
[ 98.907678] [<ffff80000059fcd8>] sk_page_frag_refill+0x20/0xd0
[ 98.908550] [<ffff8000005edc04>] tcp_sendmsg+0x1f8/0x9a8
[ 98.909368] [<ffff80000061419c>] inet_sendmsg+0x5c/0xd0
[ 98.910178] [<ffff80000059bb44>] sock_sendmsg+0x14/0x58
[ 98.911027] [<ffff80000059bbec>] sock_write_iter+0x64/0xbc
[ 98.912119] [<ffff80000019b5b8>] __vfs_write+0xac/0x10c
[ 98.913126] [<ffff80000019bcb8>] vfs_write+0x90/0x1a0
[ 98.913963] [<ffff80000019c53c>] SyS_write+0x40/0xa0
-----------
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