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:   Mon, 18 May 2020 09:46:23 +0300
From:   Vlad Buslov <>
To:     Jakub Kicinski <>
Cc:     Vlad Buslov <>,,,,,,,
Subject: Re: [PATCH net-next v2 0/4] Implement classifier-action terse dump mode

On Fri 15 May 2020 at 20:04, Jakub Kicinski <> wrote:
> On Fri, 15 May 2020 14:40:10 +0300 Vlad Buslov wrote:
>> Output rate of current upstream kernel TC filter dump implementation if
>> relatively low (~100k rules/sec depending on configuration). This
>> constraint impacts performance of software switch implementation that
>> rely on TC for their datapath implementation and periodically call TC
>> filter dump to update rules stats. Moreover, TC filter dump output a lot
>> of static data that don't change during the filter lifecycle (filter
>> key, specific action details, etc.) which constitutes significant
>> portion of payload on resulting netlink packets and increases amount of
>> syscalls necessary to dump all filters on particular Qdisc. In order to
>> significantly improve filter dump rate this patch sets implement new
>> mode of TC filter dump operation named "terse dump" mode. In this mode
>> only parameters necessary to identify the filter (handle, action cookie,
>> etc.) and data that can change during filter lifecycle (filter flags,
>> action stats, etc.) are preserved in dump output while everything else
>> is omitted.
> Please keep the review tags you already got when making minor changes.

Thanks. I generally hesitant to retain other people's tags when making
any changes to the code. I'll retain your tags when making trivial
changes from now on.

> Reviewed-by: Jakub Kicinski <>

Powered by blists - more mailing lists