From: Borislav Petkov <bp@suse.de>
To: Vinson Lee <vlee@twopensource.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Fenghua Yu <fenghua.yu@intel.com>,
Ricardo Neri <ricardo.neri-calderon@linux.intel.com>,
Suresh Siddha <sbsiddha@gmail.com>,
Matt Fleming <matt.fleming@intel.com>,
Oleg Nesterov <oleg@redhat.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: x86 math_error warning in Linux kernel 3.10
Date: Fri, 14 Nov 2014 21:36:42 +0100 [thread overview]
Message-ID: <20141114203641.GB7825@pd.tnic> (raw)
In-Reply-To: <CAHTgTXX=0JqGx1eYa4+Y5TuvzUpVwMNQdPe2a7m=r3pZBfGXxQ@mail.gmail.com>
On Fri, Nov 14, 2014 at 12:19:16PM -0800, Vinson Lee wrote:
> Hi.
>
> We hit this x86 math_error warning in Linux kernel 3.10.
>
> ------------[ cut here ]------------
> WARNING: at arch/x86/include/asm/fpu-internal.h:524 math_error+0xd1/0x219()
> Modules linked in: cls_basic act_mirred cls_u32 veth sch_ingress
> netconsole configfs ipv6 dm_multipath scsi_dh video sbs sbshc hed
> acpi_pad acpi_ipmi acpi_i2c parport_pc lp parport tcp_diag inet_diag
> ipmi_si ipmi_devintf ipmi_msghandler dell_rbu sg iTCO_wdt
> iTCO_vendor_support dcdbas igb i2c_algo_bit ptp pps_core shpchp
> lpc_ich i2c_i801 mfd_core i2c_core ioatdma dca i7core_edac edac_core
> microcode freq_table mperf ahci libahci libata sd_mod scsi_mod
> CPU: 2 PID: 53182 Comm: java Not tainted 3.10.50 #1
> 0000000000000000 ffff8808e1f5be38 ffffffff8146cb74 ffff8808e1f5be70
> ffffffff8103cbf9 0000000000000000 ffff88090b2c9730 ffff8808e1f5bf58
> 0000000000000010 0000000000000000 ffff8808e1f5be80 ffffffff8103ccbf
> Call Trace:
> [<ffffffff8146cb74>] dump_stack+0x19/0x1b
> [<ffffffff8103cbf9>] warn_slowpath_common+0x65/0x7d
> [<ffffffff8103ccbf>] warn_slowpath_null+0x1a/0x1c
> [<ffffffff8100317b>] math_error+0xd1/0x219
> [<ffffffff81007f6c>] ? read_tsc+0x9/0x19
> [<ffffffff8107bab8>] ? timekeeping_get_ns.constprop.10+0x11/0x36
> [<ffffffff8107bf32>] ? ktime_get+0x68/0x76
> [<ffffffff81007f6c>] ? read_tsc+0x9/0x19
> [<ffffffff8107bab8>] ? timekeeping_get_ns.constprop.10+0x11/0x36
> [<ffffffff810032d6>] do_coprocessor_error+0x13/0x15
> [<ffffffff81478a38>] coprocessor_error+0x18/0x20
> ---[ end trace 3e4a6532a67ba6d3 ]---
AFAICT, you're getting an FPU exception for a task which hasn't used the
FPU or current is somehow pointing to the wrong task.
Can you trigger this with the latest kernel too, i.e., say, 3.18-rc4?
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-11-14 20:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-14 20:19 Vinson Lee
2014-11-14 20:36 ` Borislav Petkov [this message]
2014-11-14 20:39 ` Thomas Gleixner
2014-11-14 21:54 ` Vinson Lee
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20141114203641.GB7825@pd.tnic \
--to=bp@suse.de \
--cc=fenghua.yu@intel.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=matt.fleming@intel.com \
--cc=mingo@redhat.com \
--cc=oleg@redhat.com \
--cc=ricardo.neri-calderon@linux.intel.com \
--cc=sbsiddha@gmail.com \
--cc=tglx@linutronix.de \
--cc=vlee@twopensource.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®