lkml.org 
[lkml]   [2014]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PANIC, hyperv] BUG: unable to handle kernel paging request at ffff880077800004 (hv_ringbuffer_write)
Date
> -----Original Message-----
> From: Sitsofe Wheeler
> Sent: Wednesday, August 20, 2014 17:27 PM
> To: Dexuan Cui
> Cc: KY Srinivasan; Greg Kroah-Hartman; Haiyang Zhang;
> devel@linuxdriverproject.org; linux-kernel@vger.kernel.org; Jean-Christophe
> Plagniol-Villard; linux-fbdev@vger.kernel.org
>
> While booting a Hyper-V 3.17.0-rc1 guest on a 2012 R2 host a BUG was
> triggered while registering hyperv_fb which in turn caused a panic.
> Various kernel debugging options (CONFIG_DEBUG_PAGEALLOC,
> CONFIG_SLUB_DEBUG=y...) were on at the time. This only seems to happen
> if the guest is being booted with only one CPU allocated to it.
>
> [ 7.645526] hv_vmbus: registering driver hyperv_fb
> [ 7.657553] BUG: unable to handle kernel paging request at
> ffff880077800004
> [ 7.658224] IP: [<ffffffff8159a7ac>] hv_ringbuffer_write+0x7c/0x150
> [ 7.658224] PGD 2da9067 PUD 2dac067 PMD 7fa27067 PTE
> 8000000077800060
> [ 7.658224] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
Hi Sitsofe,
Thanks for reporting the issue!
I suppose you're using the latest mainline v3.17-rc1(7d1311b9).

Can you please attach your kernel config file so that I can try to reproduce
the issue more easily?

Do you mean the issue only happens to UP guest and doesn't happen to
SMP guest?

Thanks,
-- Dexuan


\
 
 \ /
  Last update: 2014-08-20 13:21    [W:0.069 / U:4.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site