netdev - Re: [PATCH v2 net] tcp: md5: do not use alloc

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Message-ID: <1414105068.20845.38.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 23 Oct 2014 15:57:48 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Ahern <dsahern@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	Crestez Dan Leonard <cdleonard@...il.com>,
	netdev@...r.kernel.org,
	Jonathan Toppins <jtoppins@...ulusnetworks.com>
Subject: Re: [PATCH v2 net] tcp: md5: do not use alloc_percpu()

On Thu, 2014-10-23 at 14:44 -0600, David Ahern wrote:

> global variables do not need to be initialized to 0.
> 

Compilers are generating the same code nowadays.
They place such zero variables in bss anyway.
They finally got this right, maybe years ago.


$ nm -v net/ipv4/tcp.o | grep populated
0000000000000078 b tcp_md5sig_pool_populated



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