From: Jens Axboe <axboe@suse.de>
To: Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>
Cc: Arnaldo Carvalho de Melo <acme@conectiva.com.br>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Re: crc32 and lib.a (was Re: [PATCH] nbd in 2.5.3 does
Date: Sat, 2 Feb 2002 13:57:49 +0100 [thread overview]
Message-ID: <20020202135749.B4934@suse.de> (raw)
In-Reply-To: <20020131.145904.41634460.davem@redhat.com> <E16WQYs-0003Ux-00@the-village.bc.nu> <20020131232119.GN10772@conectiva.com.br> <200202021232.g12CWat01313@Port.imtp.ilyichevsk.odessa.ua>
In-Reply-To: <200202021232.g12CWat01313@Port.imtp.ilyichevsk.odessa.ua>
> include/linux/blk.h
>
> Changed NR_REQUEST from 256 to 16. This reduces the number of
> requests that can be queued. The size of the queue is reduced
> from 16K to 1K.
You can do even more than this -- I dunno what I/O interface these
embedded system generally uses (the mtd stuff?). Provided you provide a
direct make_request_fn entry into these instead of using the queue, you
can basically cut all of ll_rw_blk.c and elevator.c. ll_rw_block,
submit_bh, and generic_make_request would be all that is left.
That should reclaim quite a lot of space. If there's any interest in
this (has it already been done?), I can help out getting it done.
--
Jens Axboe
next prev parent reply other threads:[~2002-02-02 12:58 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-31 20:27 crc32 and lib.a (was Re: [PATCH] nbd in 2.5.3 does not Petr Vandrovec
2002-01-31 20:31 ` Jeff Garzik
2002-01-31 22:53 ` [PATCH] " Petr Vandrovec
2002-01-31 22:59 ` David S. Miller
2002-01-31 23:08 ` Jeff Garzik
2002-01-31 23:43 ` David Lang
2002-01-31 23:24 ` [PATCH] Re: crc32 and lib.a (was Re: [PATCH] nbd in 2.5.3 does Alan Cox
2002-01-31 23:21 ` Arnaldo Carvalho de Melo
2002-02-02 16:32 ` Denis Vlasenko
2002-02-02 12:57 ` Jens Axboe [this message]
2002-02-02 13:16 ` arjan
2002-02-02 13:52 ` Jens Axboe
2002-02-03 11:37 ` David Woodhouse
2002-01-31 23:43 ` Jeff Garzik
2002-01-31 23:45 ` David S. Miller
2002-02-01 0:32 ` Alan Cox
2002-02-01 10:07 ` Horst von Brand
2002-02-01 10:28 ` Keith Owens
2002-02-01 11:03 ` David S. Miller
2002-02-01 11:25 ` Keith Owens
2002-02-01 14:56 ` Jeff Garzik
2002-02-01 8:14 ` David Woodhouse
2002-02-02 2:12 ` Chris Wedgwood
2002-02-02 3:01 ` Andrew Morton
2002-02-02 7:30 ` Chris Wedgwood
2002-02-02 7:42 ` Daniel Jacobowitz
2002-02-02 8:08 ` Jeff Garzik
2002-02-02 19:20 ` Daniel Jacobowitz
2002-02-02 8:06 ` Jeff Garzik
2002-02-02 8:08 ` Keith Owens
2002-02-02 8:40 ` David Woodhouse
2002-02-02 8:59 ` Keith Owens
2002-02-02 9:14 ` David Woodhouse
2002-02-03 4:14 ` Eric W. Biederman
2002-02-03 7:01 ` Ralf Baechle
2002-02-03 9:13 ` Chris Wedgwood
2002-02-03 12:16 ` David Woodhouse
2002-02-03 12:33 ` Chris Wedgwood
2002-02-03 12:47 ` David Woodhouse
2002-02-03 13:40 ` Alan Cox
[not found] <20020131.162549.74750188.davem@redhat.com>
2002-02-01 0:42 ` Alan Cox
2002-02-01 0:30 ` David S. Miller
2002-02-01 3:46 ` Jeff Garzik
2002-02-01 4:25 ` David S. Miller
2002-02-01 4:48 ` Jeff Garzik
2002-02-01 5:59 ` David S. Miller
2002-02-01 5:10 ` Keith Owens
2002-02-01 5:12 ` Jeff Garzik
2002-02-01 5:18 ` Keith Owens
2002-02-01 13:42 ` Horst von Brand
2002-02-03 23:34 ` Keith Owens
2002-02-04 20:14 ` Horst von Brand
2002-02-01 6:01 ` David S. Miller
2002-02-01 6:11 ` Keith Owens
2002-02-01 6:26 ` David S. Miller
2002-02-01 6:43 ` Keith Owens
2002-02-01 15:03 ` Alan Cox
2002-02-01 14:55 ` Jeff Garzik
2002-02-01 15:12 ` Petr Vandrovec
2002-02-01 16:08 ` David Woodhouse
2002-02-04 13:24 ` Horst von Brand
2002-02-05 7:51 ` Jeff Garzik
2002-02-01 4:18 ` H. Peter Anvin
2002-02-01 4:35 ` Jeff Garzik
2002-02-01 15:19 ` Alan Cox
2002-02-01 19:37 ` Rob Landley
2002-02-01 19:50 ` Jeff Garzik
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