netdev - Re: [PATCH net-next 0/2] tcp: improve handling of DSACK covering multiple segments

lists.openwall.net		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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Fri, 17 Jul 2020 12:54:45 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     priyarjha@...gle.com
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/2] tcp: improve handling of DSACK covering
 multiple segments

From: Priyaranjan Jha <priyarjha@...gle.com>
Date: Thu, 16 Jul 2020 12:12:33 -0700

> Currently, while processing DSACK, we assume DSACK covers only one
> segment. This leads to significant underestimation of no. of duplicate
> segments with LRO/GRO. Also, the existing SNMP counters, TCPDSACKRecv
> and TCPDSACKOfoRecv, make similar assumption for DSACK, which makes them
> unusable for estimating spurious retransmit rates.
> 
> This patch series fixes the segment accounting with DSACK, by estimating
> number of duplicate segments based on: (DSACKed sequence range) / MSS.
> It also introduces a new SNMP counter, TCPDSACKRecvSegs, which tracks
> the estimated number of duplicate segments.

Series applied, thank you.