netdev - Re: [PATCH -next] net: tcp: add mib counters to track zero window transitions

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 19 Feb 2014 20:32:13 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Florian Westphal <fw@...len.de>,
	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH -next] net: tcp: add mib counters to track zero window transitions

Sorry...

On Wed, Feb 19, 2014 at 08:30:38PM +0100, Hannes Frederic Sowa wrote:
> NET_STATS only use 32 bit counter and thus need not be protected with a
> seqlock on 32 bit platforms. As such, it does not matter, but e.g. the IP
> counter are prone to deadlocks if used with wrong postfix because of 64 bit
> counter thus protected by seqlock.
> 
> A pitty that the _STATS_BH postfixes have the opposite meaning of the bottom

	s/bottom$/locking/

> _bh postfixes.
> 
> Basically always safe is _STATS and if we are sure we can omit the bh disable
> call because we only call the function from bh, we can use _STATS_BH calls.

Should read mails again before sending. ;)

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html