Date: Wed, 10 Sep 1997 16:50:31 -0700 (PDT) From: Simon Shapiro <Shimon@i-Connect.Net> To: freebsd-hackers@freebsd.org Subject: /usr/include/sys How To question Message-ID: <XFMail.970910165031.Shimon@i-Connect.Net>
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Hi Y'all,
First, the story:
I have a data structure that contains something like this in it:
u_int32_t state_ref_count[DLM_STATE_BITS];
Now, instead of putting #define DLM_STATE_BITS in dlm.h, it is
actually in sys/i386/conf/FOO as:
options DLM_STATE_BITS=8
which then translates (according to sys/options, of course) to
#define DLM_STATE_BITS 8
in /sys/compile/FOO/opt_dlm.h
Why do that? if we need DLM_STATE_BITS to be only 8 instead of, say, 32,
and we need 20,000 of these structures, the savings will be about 60KB.
In reality the numbers are much higher.
Now, the question:
How do I integrate opt_dlm.h into sys/dlm.h so that it will reflect the
proper sizing? If the kernel was built on the target machine, it is simple.
If not, it can be nasty.
Any suggestion is welcome.
---
Sincerely Yours, (Sent on 10-Sep-97, 16:37:54
by XF-Mail)
Simon Shapiro Atlas Telecom
Senior Architect 14355 SW Allen Blvd., Suite 130 Beaverton OR 97005
Shimon@i-Connect.Net Voice: 503.643.5559, Emergency: 503.799.2313
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