Date: Mon, 5 Jan 1998 00:26:04 +1100 From: Bruce Evans <bde@zeta.org.au> To: freebsd-current@FreeBSD.ORG, shimon@simon-shapiro.org Subject: Re: Interesting Panic in ffs Message-ID: <199801041326.AAA03268@godzilla.zeta.org.au>
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>Having done the following newfs:
>
>newfs -b 65536 -c 128 -f 32768 /dev/rsd24s1a
>
>I have gotten this panic when trying to mount the filesystem:
>
>Page fault while in kernel mode
newfs creates bad file systems for fragment sizes > SBSIZE = 8192.
Try this fix. It seems to work here.
Bruce
diff -c2 mkfs.c~ mkfs.c
*** mkfs.c~ Sun Sep 14 15:22:31 1997
--- mkfs.c Mon Jan 5 00:10:08 1998
***************
*** 502,505 ****
--- 502,507 ----
sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs));
+ if (sblock.fs_sbsize > SBSIZE)
+ sblock.fs_sbsize = SBSIZE;
if (sblock.fs_ntrak == 1) {
sblock.fs_cpc = 0;
***************
*** 533,536 ****
--- 535,540 ----
}
sblock.fs_sbsize = fragroundup(&sblock, totalsbsize);
+ if (sblock.fs_sbsize > SBSIZE)
+ sblock.fs_sbsize = SBSIZE;
/*
* calculate the available blocks for each rotational position
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