RE: ARM64/KVM: Bad page state in process iperf

From: Bhushan Bharat
Date: Tue Dec 15 2015 - 05:05:36 EST




> -----Original Message-----
> From: Christoffer Dall [mailto:christoffer.dall@xxxxxxxxxx]
> Sent: Tuesday, December 15, 2015 2:59 PM
> To: Bhushan Bharat-R65777 <Bharat.Bhushan@xxxxxxxxxxxxx>
> Cc: kvmarm@xxxxxxxxxxxxxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; linux-arm-
> kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: ARM64/KVM: Bad page state in process iperf
>
> 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?

We are using Linux-v4.1 for both host (4K page size) and guest (64K page size).

>
> Which hardware?

This is observed on Freescale LS2085 hardware based on A57 (8 CPUs).

Thanks
-Bharat

>
> -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
> >
> > -----------
> > _______________________________________________
> > kvmarm mailing list
> > kvmarm@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/