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From: Andrew Morton <akpm@linux-foundation.org>
To: "\"Ilpo Järvinen\"" <ilpo.jarvinen@helsinki.fi>
Cc: Netdev <netdev@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	David Miller <davem@davemloft.net>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [RFC PATCH 8/8] Jhash in too big for inlining, move under lib/
Date: Sat, 23 Feb 2008 10:21:59 -0800	[thread overview]
Message-ID: <20080223102159.74a465cb.akpm@linux-foundation.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0802231006360.29504@kivilampi-30.cs.helsinki.fi>

On Sat, 23 Feb 2008 12:05:36 +0200 (EET) "Ilpo Järvinen" <ilpo.jarvinen@helsinki.fi> wrote:

> On Sat, 23 Feb 2008, Andrew Morton wrote:
> 
> > On Wed, 20 Feb 2008 15:47:18 +0200 "Ilpo Järvinen" <ilpo.jarvinen@helsinki.fi> wrote:
> > 
> > > vmlinux.o:
> > >  62 functions changed, 66 bytes added, 10935 bytes removed, diff: -10869
> > > 
> > > ...+ these to lib/jhash.o:
> > >  jhash_3words: 112
> > >  jhash2: 276
> > >  jhash: 475
> > > 
> > > select for networking code might need a more fine-grained approach.
> > 
> > It should be possible to use a modular jhash.ko.  The things which you
> > have identified as clients of the jhash library are usually loaded as modules.
> > But in the case where someone does (say) NFSD=y we do need jhash.o linked into
> > vmlinux also. This is doable in Kconfig but I always forget how.
> 
> Ok, even though its not that likely that one lives without e.g.
> net/ipv4/inet_connection_sock.c or net/netlink/af_netlink.c?

Sure, the number of people who will want CONFIG_JHASH=n is very small.

> But maybe 
> some guys "really know what they are doing" and can come up with config 
> that would be able to build it as module (for other than proof-of-concept 
> uses I mean)... :-/
> 
> > Adrian, Sam and Randy are the repositories of knowledge here ;)
> 
> Thanks, I'll consult them in this. I've never needed to do any Kconfig 
> stuff so far so it's no surprise I have very little clue... :-)

Thanks.  If it gets messy I'd just put lib/jhash.o in obj-y.  I assume it's
pretty small.

> I've one question for you Andrew, how would you like this kind of 
> cross-subsys toucher to be merged, through you directly I suppose?

Sure, I can scrounge around for appropriate reviews and acks and can make
sure that nobody's pending work gets disrupted.


  reply	other threads:[~2008-02-23 18:23 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-20 13:47 [RFC PATCH 0/8]: uninline & uninline Ilpo Järvinen
2008-02-20 13:47 ` [RFC PATCH 1/8] [NET]: uninline skb_put, de-bloats a lot Ilpo Järvinen
2008-02-20 13:47   ` [RFC PATCH 2/8] [NET]: uninline skb_pull, " Ilpo Järvinen
2008-02-20 13:47     ` [RFC PATCH 3/8] [NET]: uninline dev_alloc_skb, " Ilpo Järvinen
2008-02-20 13:47       ` [RFC PATCH 4/8] [NET]: uninline skb_push, " Ilpo Järvinen
2008-02-20 13:47         ` [RFC PATCH 5/8] [NET]: uninline dst_release Ilpo Järvinen
2008-02-20 13:47           ` [RFC PATCH 6/8] [NET]: uninline skb_trim, de-bloats Ilpo Järvinen
2008-02-20 13:47             ` [RFC PATCH 7/8] [SCTP]: uninline sctp_add_cmd_sf Ilpo Järvinen
2008-02-20 13:47               ` [RFC PATCH 8/8] Jhash in too big for inlining, move under lib/ Ilpo Järvinen
2008-02-23  8:02                 ` Andrew Morton
2008-02-23 10:05                   ` Ilpo Järvinen
2008-02-23 18:21                     ` Andrew Morton [this message]
2008-02-23 13:06                   ` Andi Kleen
2008-02-20 22:16               ` [RFC PATCH 7/8] [SCTP]: uninline sctp_add_cmd_sf Vlad Yasevich
2008-02-20 22:34                 ` Ilpo Järvinen
2008-02-21 15:27                   ` Vlad Yasevich
2008-02-20 16:19       ` [RFC PATCH 3/8] [NET]: uninline dev_alloc_skb, de-bloats a lot Jan Engelhardt
2008-02-20 16:27         ` Patrick McHardy
2008-02-20 16:30           ` Jan Engelhardt
2008-02-20 22:18             ` Ilpo Järvinen
2008-03-12 15:27               ` Ilpo Järvinen
2008-02-20 13:54   ` [RFC PATCH 1/8] [NET]: uninline skb_put, " Patrick McHardy
2008-02-20 13:57   ` Eric Dumazet
2008-02-23  8:02 ` [RFC PATCH 0/8]: uninline & uninline Andrew Morton
2008-02-23 10:11   ` Ilpo Järvinen
2008-02-23 13:15   ` Andi Kleen
2008-02-23 18:06     ` Ilpo Järvinen
2008-02-23 18:55     ` Andrew Morton
2008-02-23 19:58       ` Hua Zhong
2008-02-23 21:02         ` Andi Kleen
2008-02-27 19:08       ` profile-likely patch (was " Valdis.Kletnieks

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