Date: Sun, 16 May 1999 18:42:03 +0200 From: Jos Backus <Jos.Backus@nl.origin-it.com> To: current@FreeBSD.ORG Subject: MFS still hosed Message-ID: <19990516184203.A66381@hal.mpn.cp.philips.com>
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With todays -current, mounting /tmp using
swap /tmp mfs rw,nosuid,nodev,-s=32768 0 0
yields a
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x9d203590
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc016f30c
stack pointer = 0x10:0xc5aa2d70
frame pointer = 0x10:0xc5aa2d9c
code segment = base 0x0, limit 0xffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 362 (mount_mfs)
Stopped at checkalias+0x13c: movl cdevsw(%eax),%eax
%eax contains 0xdcfba6d0
This line in checkalias() in vfs_subr.c seems to be the culprit:
1488: 56 pushl %esi
1489: e8 fc ff ff ff call 148a <checkalias+0x12e>
148e: 8b 04 85 00 00 movl 0x0(,%eax,4),%eax
1493: 00 00
1495: c1 e0 02 shll $0x2,%eax
=> 1498: 8b 80 00 00 00 movl 0x0(%eax),%eax
149d: 00
149e: 89 45 e4 movl %eax,0xffffffe4(%ebp)
(I'm not sure yet which source line this section corresponds to :-)
Anyone else seen this?
--
Jos Backus _/ _/_/_/ "Reliability means never
_/ _/ _/ having to say you're sorry."
_/ _/_/_/ -- D. J. Bernstein
_/ _/ _/ _/
Jos.Backus@nl.origin-it.com _/_/ _/_/_/ use Std::Disclaimer;
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