Re: ARM64/KVM: Bad page state in process iperf
From: Christoffer Dall
Date: Tue Dec 15 2015 - 04:29:26 EST
On Tue, Dec 15, 2015 at 03:46:03AM +0000, Bhushan Bharat wrote:
>
> Hi All,
>
> I am running "iperf" in KVM guest on ARM64 machine and observing below crash.
Which host/guest kernel version is this?
Which hardware?
-Christoffer
>
> =============================
> $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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