lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Fri, 24 Jul 2020 17:56:11 -0700
From:   Jakub Kicinski <>
To:     Shannon Nelson <>
Subject: Re: [PATCH net-next 4/4] ionic: separate interrupt for Tx and Rx

On Fri, 24 Jul 2020 17:23:26 -0700 Shannon Nelson wrote:
> Add the capability to split the Tx queues onto their own
> interrupts with their own napi contexts.  This gives the
> opportunity for more direct control of Tx interrupt
> handling, such as CPU affinity and interrupt coalescing,
> useful for some traffic loads.
> To enable, use the ethtool private flag:
> 	ethtool --set-priv-flag enp20s0 split-q-intr on
> To restore defaults
> 	ethtool --set-priv-flag enp20s0 split-q-intr off
> When enabled, the number of queues is cut in half in order
> to reuse the interrupts that have already been allocated to
> the device.  When disabled, the queue count is restored.
> Signed-off-by: Shannon Nelson <>

Splitting queues into tx-only and rx-only is done like this:

ethtool -L enp20s0 rx N tx N combined 0

And then back to combined:

ethtool -L enp20s0 rx 0 tx 0 combined N

No need for a private flag here.

Powered by blists - more mailing lists