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From: Tejun Heo <tj@kernel.org>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: NeilBrown <neilb@suse.de>,
	torvalds@linux-foundation.org, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	paul.gortmaker@windriver.com, davem@davemloft.net,
	rostedt@goodmis.org, mingo@elte.hu, ebiederm@xmission.com,
	aarcange@redhat.com, ericvh@gmail.com, netdev@vger.kernel.org,
	josh@joshtriplett.org, eric.dumazet@gmail.com,
	mathieu.desnoyers@efficios.com, axboe@kernel.dk, agk@redhat.com,
	dm-devel@redhat.com, ccaulfie@redhat.com, teigland@redhat.com,
	Trond.Myklebust@netapp.com, bfields@fieldses.org,
	fweisbec@gmail.com, jesse@nicira.com,
	venkat.x.venkatsubra@oracle.com, ejt@redhat.com,
	snitzer@redhat.com, edumazet@google.com,
	linux-nfs@vger.kernel.org, dev@openvswitch.org,
	rds-devel@oss.oracle.com, lw@cn.fujitsu.com
Subject: Re: [PATCH 01/16] hashtable: introduce a small and naive hashtable
Date: Tue, 14 Aug 2012 17:28:34 -0700	[thread overview]
Message-ID: <20120815002834.GI25632@google.com> (raw)
In-Reply-To: <502AEC51.2010305@gmail.com>

Hello,

(Sasha, would it be possible to change your MUA so that it breaks long
 lines.  It's pretty difficult to reply to.)

On Wed, Aug 15, 2012 at 02:24:49AM +0200, Sasha Levin wrote:
> The hashtable uses hlist. hlist provides us with an entire family of
> init functions which I'm supposed to use to initialize hlist heads.
> 
> So while a memset(0) will work perfectly here, I consider that
> cheating - it results in an uglier code that assumes to know about
> hlist internals, and will probably break as soon as someone tries to
> do something to hlist.

I think we should stick with INIT_HLIST_HEAD().  It's not a hot path
and we might add, say, debug fields or initialization magics added
later.  If this really matters, the right thing to do would be adding
something like INIT_HLIST_HEAD_ARRAY().

Thanks.

-- 
tejun

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WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <tj@kernel.org>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: NeilBrown <neilb@suse.de>,
	torvalds@linux-foundation.org, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	paul.gortmaker@windriver.com, davem@davemloft.net,
	rostedt@goodmis.org, mingo@elte.hu, ebiederm@xmission.com,
	aarcange@redhat.com, ericvh@gmail.com, netdev@vger.kernel.org,
	josh@joshtriplett.org, eric.dumazet@gmail.com,
	mathieu.desnoyers@efficios.com, axboe@kernel.dk, agk@redhat.com,
	dm-devel@redhat.com, ccaulfie@redhat.com, teigland@redhat.com,
	Trond.Myklebust@netapp.com, bfields@fieldses.org,
	fweisbec@gmail.com, jesse@nicira.com,
	venkat.x.venkatsubra@oracle.com, ejt@redhat.com,
	snitzer@redhat.com, edumazet@google.com,
	linux-nfs@vger.kernel.org, dev@openvswitch.org,
	rds-devel@oss.oracle.com, lw@cn.fujitsu.com
Subject: Re: [PATCH 01/16] hashtable: introduce a small and naive hashtable
Date: Tue, 14 Aug 2012 17:28:34 -0700	[thread overview]
Message-ID: <20120815002834.GI25632@google.com> (raw)
In-Reply-To: <502AEC51.2010305@gmail.com>

Hello,

(Sasha, would it be possible to change your MUA so that it breaks long
 lines.  It's pretty difficult to reply to.)

On Wed, Aug 15, 2012 at 02:24:49AM +0200, Sasha Levin wrote:
> The hashtable uses hlist. hlist provides us with an entire family of
> init functions which I'm supposed to use to initialize hlist heads.
> 
> So while a memset(0) will work perfectly here, I consider that
> cheating - it results in an uglier code that assumes to know about
> hlist internals, and will probably break as soon as someone tries to
> do something to hlist.

I think we should stick with INIT_HLIST_HEAD().  It's not a hot path
and we might add, say, debug fields or initialization magics added
later.  If this really matters, the right thing to do would be adding
something like INIT_HLIST_HEAD_ARRAY().

Thanks.

-- 
tejun

  reply	other threads:[~2012-08-15  0:28 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-14 16:24 [PATCH 00/16] generic hashtable implementation Sasha Levin
2012-08-14 16:24 ` Sasha Levin
2012-08-14 16:24 ` Sasha Levin
2012-08-14 16:24 ` [PATCH 02/16] user_ns: use new " Sasha Levin
2012-08-14 16:24   ` Sasha Levin
2012-08-14 23:52   ` Eric W. Biederman
2012-08-14 23:52     ` Eric W. Biederman
     [not found]     ` <87txw5hw0s.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2012-08-15  0:47       ` Sasha Levin
2012-08-15  0:47         ` Sasha Levin
2012-08-15  0:47         ` Sasha Levin
     [not found]         ` <502AF184.4010907-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-08-15  1:08           ` Eric W. Biederman
2012-08-15  1:08             ` Eric W. Biederman
2012-08-15  1:08             ` Eric W. Biederman
2012-08-15  1:35             ` Sasha Levin
2012-08-15  1:35               ` Sasha Levin
     [not found]               ` <502AFCD5.6070104-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-08-15  3:13                 ` Eric W. Biederman
2012-08-15  3:13                   ` Eric W. Biederman
2012-08-15  3:13                   ` Eric W. Biederman
2012-08-15  3:31                   ` Mathieu Desnoyers
2012-08-15  3:31                     ` Mathieu Desnoyers
2012-08-15 13:40                     ` Sasha Levin
2012-08-15 13:40                       ` Sasha Levin
2012-08-15 13:40                       ` Sasha Levin
     [not found]                   ` <87obmchmpu.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2012-08-15  8:46                     ` David Laight
2012-08-15  8:46                       ` David Laight
2012-08-15  8:46                       ` David Laight
     [not found]                       ` <AE90C24D6B3A694183C094C60CF0A2F6026B6FB5-CgBM+Bx2aUAnGFn1LkZF6NBPR1lH4CV8@public.gmane.org>
2012-08-16 14:28                         ` Mathieu Desnoyers
2012-08-16 14:28                           ` Mathieu Desnoyers
2012-08-16 14:28                           ` Mathieu Desnoyers
2012-08-18 21:52     ` Sasha Levin
2012-08-18 22:21       ` Eric W. Biederman
2012-08-14 16:24 ` [PATCH 03/16] mm,ksm: " Sasha Levin
2012-08-14 16:24   ` Sasha Levin
2012-08-14 16:24 ` [PATCH 07/16] net,9p: " Sasha Levin
2012-08-14 16:24   ` Sasha Levin
     [not found] ` <1344961490-4068-1-git-send-email-levinsasha928-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-08-14 16:24   ` [PATCH 01/16] hashtable: introduce a small and naive hashtable Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
     [not found]     ` <1344961490-4068-2-git-send-email-levinsasha928-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-08-14 23:25       ` NeilBrown
2012-08-14 23:25         ` NeilBrown
     [not found]         ` <20120815092523.00a909ef-wvvUuzkyo1EYVZTmpyfIwg@public.gmane.org>
2012-08-15  0:24           ` Sasha Levin
2012-08-15  0:24             ` Sasha Levin
2012-08-15  0:24             ` Sasha Levin
2012-08-15  0:28             ` Tejun Heo [this message]
2012-08-15  0:28               ` Tejun Heo
2012-08-14 16:24   ` [PATCH 04/16] workqueue: use new hashtable implementation Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 05/16] mm/huge_memory: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 06/16] tracepoint: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 08/16] block, elevator: " Sasha Levin
2012-08-14 16:24     ` [PATCH 08/16] block,elevator: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 09/16] SUNRPC/cache: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 10/16] dlm: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 11/16] net, l2tp: " Sasha Levin
2012-08-14 16:24     ` [PATCH 11/16] net,l2tp: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 12/16] dm: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 13/16] lockd: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 15/16] openvswitch: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24   ` [PATCH 16/16] tracing output: " Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24     ` Sasha Levin
2012-08-14 16:24 ` [PATCH 14/16] net,rds: " Sasha Levin
2012-08-14 16:24   ` Sasha Levin
2012-08-14 18:16 ` [PATCH 00/16] generic " J. Bruce Fields
2012-08-14 18:16   ` J. Bruce Fields

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