> >> Cc: alex.william...@redhat.com; ankur.a.ar...@oracle.com; linux-
> >> ker...@vger.kernel.org; Sunil Kovvuri Goutham ;
> >> termi...@gmail.com
> >> Subject: [EXT] Re: vfio-pci: protect remap_pfn_range() from
> >> simultaneous calls
> >>
> >> Ext
Subject: [EXT] Re: vfio-pci: protect remap_pfn_range() from simultaneous calls
External Email
--
Hi Bharat,
Can you test the patch below to see if it works for you?
Sorry for late reply, I actually missed this email
ject: [EXT] Re: vfio-pci: protect remap_pfn_range() from simultaneous calls
>
> External Email
>
> --
> Hi Bharat,
>
> Can you test the patch below to see if it works for you?
Sorry for late reply, I actually mis
Hi Bharat,
Can you test the patch below to see if it works for you?
Also could you add some more detail to your earlier description of
the bug?
In particular, AFAICS you are using ODP (-DPDK?) with multiple
threads touching this region. From your stack, it looks like the
fault was user-space gene
Hi Bharat,
So I don't have a final patch for you, but can you test the one below
the scissors mark? (The patch is correct, but I'm not happy that it
introduces a new lock.)
Ankur
-- >8 --
Date: Thu, 21 Jan 2021 00:04:36 +
Subject: vfio-pci: protect io_remap_pfn_range() from simultaneous cal
Hi Ankur,
> -Original Message-
> From: Ankur Arora
> Sent: Wednesday, January 6, 2021 11:44 PM
> To: Bharat Bhushan ; alex.william...@redhat.com
> Cc: linux-kernel@vger.kernel.org; Sunil Kovvuri Goutham
>
> Subject: [EXT] Re: vfio-pci: protect remap_pfn_range() fr
> -Original Message-
> From: Ankur Arora
> Sent: Wednesday, January 6, 2021 11:44 PM
> To: Bharat Bhushan ; alex.william...@redhat.com
> Cc: linux-kernel@vger.kernel.org; Sunil Kovvuri Goutham
>
> Subject: [EXT] Re: vfio-pci: protect remap_pfn_range() fr
On 2021-01-06 8:17 a.m., Bharat Bhushan wrote:
Hi Ankur,
We are observing below BUG_ON() with latest kernel
[10011.321645] [ cut here ]
[10011.322262] kernel BUG at mm/memory.c:1816!
[10011.323793] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[10011.326
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