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SubjectRe: canfdtest on flexcan loopback
Date
On 9/18/20 2:27 PM, Vladimir Oltean wrote:
>> Is there a bug in v5.4.3? v5.4.66 is current latest v5.4.x

> commit 63d5320a0c9b9867628a3a5a12e7f11d4cc109c2
> Author: Paolo Abeni <pabeni@redhat.com>
> Date: Tue Feb 18 18:15:44 2020 +0100
>
> Revert "net: dev: introduce support for sch BYPASS for lockless qdisc"
>
> [ Upstream commit 379349e9bc3b42b8b2f8f7a03f64a97623fff323 ]
>
> This reverts commit ba27b4cdaaa66561aaedb2101876e563738d36fe
>
> Ahmed reported ouf-of-order issues bisected to commit ba27b4cdaaa6

yes, that's probably the the issue.

This concluded into using an old LTS kernel, is worse than using the latest
kernel :)

> ("net: dev: introduce support for sch BYPASS for lockless qdisc").
> I can't find any working solution other than a plain revert.
>
> This will introduce some minor performance regressions for
> pfifo_fast qdisc. I plan to address them in net-next with more
> indirect call wrapper boilerplate for qdiscs.
>
> Reported-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> Fixes: ba27b4cdaaa6 ("net: dev: introduce support for sch BYPASS for lockless qdisc")
> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>
> net/core/dev.c | 22 ++--------------------
> 1 file changed, 2 insertions(+), 20 deletions(-)

Marc

--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
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