netdev - Re: [PATCH] INET : removes per bucket rwlock in tcp/dccp ehash table

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Message-ID: <472E0C24.9040009@o2.pl>
Date:	Sun, 04 Nov 2007 19:15:00 +0100
From:	Jarek Poplawski <jarkao2@...pl>
To:	Jarek Poplawski <jarkao2@...pl>
CC:	Eric Dumazet <dada1@...mosbay.com>,
	David Miller <davem@...emloft.net>, ak@...e.de,
	netdev@...r.kernel.org, acme@...hat.com
Subject: Re: [PATCH] INET : removes per bucket rwlock in tcp/dccp ehash table

Jarek Poplawski wrote, On 11/04/2007 06:58 PM:

> Eric Dumazet wrote, On 11/04/2007 12:31 PM:

...

>> +static inline int inet_ehash_locks_alloc(struct inet_hashinfo *hashinfo)
>> +{

...

>> +	if (sizeof(rwlock_t) != 0) {

...

>> +		for (i = 0; i < size; i++)
>> +			rwlock_init(&hashinfo->ehash_locks[i]);
> 
> 
> This looks better now, but still is doubtful to me: even if it's safe with
> current rwlock implementation, can't we imagine some new debugging or
> statistical code added, which would be called from rwlock_init() without
> using rwlock_t structure? IMHO, if read_lock() etc. are called in such a
> case, rwlock_init() should be done as well.


Of course I mean: if sizeof(rwlock_t) == 0.

 
Jarek P
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