cvs commit: src/release/i386 drivers.conf

[Ruslan Ermilov]

On Fri, Jul 25, 2003 at 01:41:33AM -0600, Scott Long wrote:
> Ruslan Ermilov wrote:
> >On Thu, Jul 24, 2003 at 05:10:33PM -0700, Scott Long wrote:
> >
> >>scottl      2003/07/24 17:10:33 PDT
> >>
> >> FreeBSD src repository
> >>
> >> Modified files:
> >>   release/i386         drivers.conf 
> >> Log:
> >> Move the mlx driver back into the kernel so that the drivers floppy 
> >> doesn't
> >> overflow.
> >> 
> >> Revision  Changes    Path
> >> 1.29      +0 -1      src/release/i386/drivers.conf
> >>
> >
> >Which reminds me.  The floppy wasn't overflowing when building
> >5.x snapshot on 4.x, due to the differences in file system
> >layout between 4.x and 5.x.  Please see the attached if you're
> >interested.
> >
> >
> >Cheers,
> >
> >
> 
> Now that -O2 is the default for newfs in 5-current, does the 'Oflag == 
> 2' trick still work?
> 
Yes it does:

1.  doFS.sh creates file systems with -O1
2.  The patch affects the -O1 case:

dd if=/dev/zero of=floppy.img bs=1k count=1440
mdconfig -a -t vnode -f floppy.img -u 0
disklabel -r -w md0 fd1440
newfs -O1 -ospace -m0 -i40000 /dev/md0c
df -k /dev/md0
mdconfig -d -u 0

Using this script, which resembles the numbers for drivers.flp,
I get:

1.  Unpatched newfs(8):

: /dev/md0c: 1.4MB (2880 sectors) block size 4096, fragment size 512
:         using 2 cylinder groups of 1.22MB, 312 blks, 32 inodes.
                ^
: super-block backups (for fsck -b #) at:
:  32, 2528
: Filesystem 1K-blocks    Used   Avail Capacity  Mounted on
: /dev/md0        1391       0    1391     0%
                  ^^^^

2.  Patched newfs(8):

: /dev/md0c: 1.4MB (2880 sectors) block size 4096, fragment size 512
:         using 1 cylinder groups of 1.41MB, 361 blks, 64 inodes.
                ^
: super-block backups (for fsck -b #) at:
:  32
: Filesystem 1K-blocks    Used   Avail Capacity  Mounted on
: /dev/md0        1403       0    1403     0%
                  ^^^^

> Even if it does, it feels like a hack to me.  I'd
> rather that newfs have an option to directly override the number of
> c/g's, rather than rely on indirect calculations and magic constants.
> 
*Shrug*, an option to override a minimum value?

> Please don't commit this until we have discussed it more.
> 
I'm not committing it since February 26th, so waiting a couple
of months more is not an issue.  :-)


Cheers,
-- 
Ruslan Ermilov		Sysadmin and DBA,
ru at sunbay.com		Sunbay Software Ltd,
ru at FreeBSD.org		FreeBSD committer
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