Date: Thu, 11 Oct 2001 10:01:15 +0900 From: Makoto MATSUSHITA <matusita@jp.FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/release/i386 dokern.sh Message-ID: <20011011100115Q.matusita@jp.FreeBSD.org> In-Reply-To: <200110080343.f983htL29456@khavrinen.lcs.mit.edu> References: <200110051728.f95HSX738122@harmony.village.org> <20011007021605I.matusita@jp.FreeBSD.org> <200110080343.f983htL29456@khavrinen.lcs.mit.edu>
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wollman> I found that it helps a lot if you link the modules together into a
wollman> single kld (amortizing the overhead of the linker metadata over
wollman> multiple modules). Just take the *.kld (NOT *.ko) from the object
wollman> directories and link them together with `ld -Bshareable'.
I've tried to confirm this.
* compile all kernel modules.
* copied *.kld into single directory.
* run 'ld -Bshareable -o merged.ko *.kld'.
some modules conflicts about function definition. The
conflicted modules pair are:
if_sl/if_ppp
nfsserver/nfsclient
ng_sync_ar/if_ar
ng_sync/sr/if_sr
ng_vjc/if_ppp
* remove if_sr, if_ppp, nfs*, and ng_* modules and link again.
# ld -Bshareable -o merged.ko *.kld
# ls -l *.kld | wc
165 1485 9809
# ls -l *.kld | awk '{sum+=$5} END {print sum}'
6433815
# ls -l merged.ko
-rwxr-xr-x 1 root wheel 5116576 Oct 11 00:41 merged.ko
Wow... it is worth trying to merge modules into single one. I'll try
it later.
***
BTW, why 'bge' and 'lge', gigabit ethernet drivers, are not in GENERIC
yet? it is still developing is not working, or just missed?
Before patch:
kern.flp 59 kbytes left
mfsroot.flp 311 kbytes left
After patch #1 (remove some drivers out to kernel module):
kern.flp 139 kbytes left
mfsroot.flp 115 kbytes left
After patch #2 (#1 plus adding 'bge' and 'lge'):
kern.flp 139 kbytes left
mfsroot.flp 95 kbytes left
We lost more 20kbytes in mfsroot.flp but it still fits to 1.44MB floppy.
-- -
Makoto `MAR' MATSUSHITA
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