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SubjectRe: [PATCH] net/mlx4_en: ensure rx_desc updating reaches HW before prod db updating
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On Sun, 2018-01-21 at 18:24 +0200, Tariq Toukan wrote:
>
> On 21/01/2018 11:31 AM, Tariq Toukan wrote:
> >
> >
> > On 19/01/2018 5:49 PM, Eric Dumazet wrote:
> > > On Fri, 2018-01-19 at 23:16 +0800, jianchao.wang wrote:
> > > > Hi Tariq
> > > >
> > > > Very sad that the crash was reproduced again after applied the patch.
>
> Memory barriers vary for different Archs, can you please share more
> details regarding arch and repro steps?

Yeah, mlx4 NICs in Google fleet receive trillions of packets per
second, and we never noticed an issue.

Although we are using a slightly different driver, using order-0 pages
and fast pages recycling.

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