[8351] in linux-scsi channel archive
Re: SD_EXTRA_DEVS (was Problem)
daemon@ATHENA.MIT.EDU (Kurt Garloff)
Fri Mar 10 05:04:33 2000
Date: Fri, 10 Mar 2000 11:00:45 +0100
From: Kurt Garloff <garloff@suse.de>
To: sjbuller@us.ibm.com
Cc: linux-scsi@vger.rutgers.edu
Message-ID: <20000310110045.L15075@mobil.tue.nl>
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In-Reply-To: <8725689D.006576BA.00@d53mta02h.boulder.ibm.com>; from sjbuller@us.ibm.com on Thu, Mar 09, 2000 at 11:28:13AM -0700
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On Thu, Mar 09, 2000 at 11:28:13AM -0700, sjbuller@us.ibm.com wrote:
> To get to a "Linux for the masses" situation, its gotta work out of box.
> As releases "fix" things like SD_EXTRA_DEVS, the straight-jacket starts to
> fit a little more comfortably.
We are considering our installation support to be very important and see
that it's under heavy load.
So, making things work out of the box for most people without the need for
custom changes is a concern.
Just as a data point, here is what we shipped in SuSE 6.3 and 6.4 kernels:
(2.2.12 resp. 2.2.14 patched with fixes from Andrea's and Alan's prerelease
series ...)
#ifdef CONFIG_SCSI_PLUTO_MODULE
#define SD_EXTRA_DEVS 40
#else
#define SD_EXTRA_DEVS 21
#endif
#define ST_EXTRA_DEVS 3
#define SR_EXTRA_DEVS 8
#define SG_EXTRA_DEVS (SD_EXTRA_DEVS + SR_EXTRA_DEVS + ST_EXTRA_DEVS)
I remember, I once calculated the amount of memory that is being "wasted" by
this, but I only remember it did not seem a lot to me. IIRC, it was just one
page.
I'd suggest, 2.2.15 gets numbers like that in stock kernel, so anybody can
rely on it.
Regards,
--
Kurt Garloff <garloff@suse.de> Eindhoven, NL
GPG key: See mail header, key servers Linux kernel development
SuSE GmbH, Nuernberg, FRG SCSI, Security
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