From: Jens Axboe <axboe@suse.de>
To: "Adam J. Richter" <adam@yggdrasil.com>
Cc: akpm@zip.com.au, linux-kernel@vger.kernel.org
Subject: Re: bio_chain: proposed solution for bio_alloc failure and large IO simplification
Date: Mon, 17 Jun 2002 08:37:28 +0200 [thread overview]
Message-ID: <20020617063728.GQ1359@suse.de> (raw)
In-Reply-To: <200206152024.NAA02772@adam.yggdrasil.com>
On Sat, Jun 15 2002, Adam J. Richter wrote:
> >> Can't I make a macro to do a table lookup from bio->bi_max?
>
> >Not really. If I do
>
> > bio_alloc(GFP_KERNEL, 27);
>
> >then I'll get a 32-slot bvec. But presumably, I don't
> >want to put more than 27 pages into it.
>
> If you called bio_alloc with a smaller number, that would
> just be the result of a small IO that you knew could not generate
> more iovecs than that. So, that scenario will not happen.
But the macro lookup would fail for bios not coming from bio_alloc()
--
Jens Axboe
next prev parent reply other threads:[~2002-06-17 6:37 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-15 20:24 bio_chain: proposed solution for bio_alloc failure and large IO simplification Adam J. Richter
2002-06-17 6:37 ` Jens Axboe [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-06-15 20:01 Adam J. Richter
2002-06-15 20:22 ` Andrew Morton
2002-06-15 10:30 Adam J. Richter
2002-06-15 19:50 ` Andrew Morton
2002-06-17 6:36 ` Jens Axboe
2002-06-17 7:09 ` Andrew Morton
2002-06-15 9:10 Adam J. Richter
2002-06-15 9:14 ` Jens Axboe
2002-06-15 8:52 Adam J. Richter
2002-06-15 9:00 ` Jens Axboe
2002-06-15 8:45 Adam J. Richter
2002-06-15 8:50 ` Jens Axboe
2002-06-15 4:38 Adam J. Richter
2002-06-15 0:22 Adam J. Richter
2002-06-14 23:39 Adam J. Richter
2002-06-14 23:58 ` Andrew Morton
2002-06-15 1:38 ` Oliver Xymoron
2002-06-15 7:55 ` Jens Axboe
2002-06-14 16:52 Adam J. Richter
2002-06-14 23:00 ` Andrew Morton
2002-06-14 23:29 ` William Lee Irwin III
2002-06-14 23:38 ` Andrew Morton
2002-06-15 7:55 ` Jens Axboe
2002-06-14 1:56 Adam J. Richter
2002-06-14 2:24 ` Andreas Dilger
2002-06-14 14:57 ` Jens Axboe
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