From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jesper Dangaard Brouer <hawk@comx.dk>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>,
Steven Rostedt <srostedt@redhat.com>,
Alexander Duyck <alexander.h.duyck@intel.com>,
Stephen Hemminger <shemminger@vyatta.com>,
netfilter-devel <netfilter-devel@vger.kernel.org>,
netdev <netdev@vger.kernel.org>,
Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Subject: Re: Possible regression: Packet drops during iptables calls
Date: Thu, 16 Dec 2010 15:29:35 +0100 [thread overview]
Message-ID: <1292509775.2883.187.camel@edumazet-laptop> (raw)
In-Reply-To: <1292509489.31289.20.camel@firesoul.comx.local>
Le jeudi 16 décembre 2010 à 15:24 +0100, Jesper Dangaard Brouer a
écrit :
> In my case I think this will not help. I'll kill the cache anyways, as
> the ruleset is 19MB and my CPU cache is 8MB.
>
>
Yep ;)
By the way, you speak of a 'possible regression', but we always masked
BH while doing get_counters().
Only very recent kernels are masking them for each unit (cpu) of work.
There was attempt to use a lockless read for each counter (using a
seqlock), but it was not completed. I guess we could do something to
ressurect this idea.
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2010-12-16 14:29 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-14 14:46 Possible regression: Packet drops during iptables calls Jesper Dangaard Brouer
2010-12-14 15:31 ` Eric Dumazet
2010-12-14 16:09 ` Jesper Dangaard Brouer
2010-12-14 16:24 ` Eric Dumazet
2010-12-16 14:04 ` Jesper Dangaard Brouer
2010-12-16 14:12 ` Eric Dumazet
2010-12-16 14:24 ` Jesper Dangaard Brouer
2010-12-16 14:29 ` Eric Dumazet [this message]
2010-12-16 15:02 ` Eric Dumazet
2010-12-16 16:07 ` [PATCH net-next-2.6] netfilter: ip_tables: dont block BH while reading counters Eric Dumazet
2010-12-16 16:53 ` [PATCH v2 " Eric Dumazet
2010-12-16 17:31 ` Stephen Hemminger
2010-12-16 17:53 ` [PATCH v3 net-next-2.6] netfilter: x_tables: " Eric Dumazet
2010-12-16 17:57 ` Stephen Hemminger
2010-12-16 19:58 ` Eric Dumazet
2010-12-16 20:12 ` Stephen Hemminger
2010-12-16 20:40 ` Eric Dumazet
2010-12-16 17:57 ` Stephen Hemminger
2010-12-18 4:29 ` [PATCH v4 " Eric Dumazet
2010-12-20 13:42 ` Jesper Dangaard Brouer
2010-12-20 14:45 ` Eric Dumazet
2010-12-21 16:48 ` Jesper Dangaard Brouer
2011-01-08 16:45 ` Eric Dumazet
2011-01-09 21:31 ` Pablo Neira Ayuso
2010-12-16 14:13 ` Possible regression: Packet drops during iptables calls Eric Dumazet
2010-12-16 14:20 ` Steven Rostedt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1292509775.2883.187.camel@edumazet-laptop \
--to=eric.dumazet@gmail.com \
--cc=acme@infradead.org \
--cc=alexander.h.duyck@intel.com \
--cc=hawk@comx.dk \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=peter.p.waskiewicz.jr@intel.com \
--cc=shemminger@vyatta.com \
--cc=srostedt@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox