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- Xref: sparky comp.unix.internals:1777 comp.unix.sysv386:14202
- Newsgroups: comp.unix.internals,comp.unix.sysv386
- Path: sparky!uunet!cs.utexas.edu!wupost!udel!gvls1!jabber!candle!root
- From: root@candle.uucp (Bruce Momjian)
- Subject: Turning on cache causes random kernel panics, core dumps
- Organization: a consultant's basement
- Date: Wed, 9 Sep 1992 02:38:18 GMT
- Message-ID: <1992Sep9.023818.3088@candle.uucp>
- X-Newsreader: Tin 1.1 PL5
- Lines: 116
-
- I am running SCO Unix SVr3.2 2.0 on an Everex Next 386/33. The box is
- stuffed to the gills, with 2 SCSI hard drives, 2 SCSI tape drives, an
- Arcnet multiport card, an ethernet card running TCP/IP, and two floppy
- drives.
-
- With the motherboard cache is turned off, it runs fine. When the cache
- is turned on, the system dumps core of executables at random, and
- finally kernel panics. Attached are tracebacks of three of those
- panics. I notice that the panics seem to all occur in ttxput(). I
- tried removing the Arcnet and ethernet cards, but the problem did not go
- away.
-
- The first panic occured when the system successfully went into
- multi-user mode, and I was in an application. The second was
- caused by my typing 'ps -ef' at the console. The third was caused by the
- TCP/IP starting up before generating logins. In all cases, I was the
- only one using the system, and all occurred within 10 minutes of boot.
- I still have the panic images.
-
- The core dumps seem to occur most often in the tty database startup
- section before logins are started, and can also report 'no space', even
- though there is tons of space on all drives. Core dumps can also happen
- in applications.
-
- Many thanks to those who responded to my 'modem hanging system' query.
- I will be able to prevent the hangs now. Thanks for reading and perhaps
- responding to this lengthy posting.
-
- --------------------------------------------------------------------------
- PANIC WHEN STARTING APPLICATION
-
- $ crash brs_dump
- dumpfile = brs_dump, namelist = /unix, outfile = stdout
- > t
- STACK TRACE FOR PROCESS 19:
- STKADDR FRAMEPTR FUNCTION POSSIBLE ARGUMENTS
- e0000c24 e0000c3c prf_task (e,d008c629,d00b0790,160)
- e0000c44 e0000c68 cmn_err (3,d00b1058,e,d00a2e7c)
- e0000c70 e0000c94 k_trap (e0000ca0)
- Trap e e0000ca0 cmntrap from d009b6d0 in ttxput
- ax: 1b cx: 40 dx: 1893b7b bx: 1805 fl: 10246 ds: 160 fs: 0
- sp:e0000cd0 bp:e0000d14 si:d00a2e7c di: 1b err:d0100000 es: 160 gs: 0
- e0000ca8 e0000d14 ttxput (d00a2e7c,d10dddd0,3f,d00a2e7c)
- e0000d1c e0000d44 ttwrite (d00a2e7c,d0100000,4b)
- e0000d4c e0000d58 vidwrite (d00cc708,d010f074,d00c8348,0)
- e0000d60 e0000d74 cnwrite (0,2,d00c8348,d010f074)
- e0000d7c e0000db4 s5writei (d010f074,e0000e38,d00b0b30,52)
- e0000dbc e0000dec rdwr (2)
- e0000df4 e0000df8 write (188f92c,1893b3c,52,d0117868)
- e0000e00 e0000e2c systrap (e0000e38)
- e0000e38 sys_call from 00079274
- ax: 4 cx: 0 dx: 189abe8 bx: 52 fl: 202 ds: 1f fs: 0
- sp:e0000e68 bp:7ffffce8 si: 188f92c di: 1893b3c err: 4 es: 1f gs: 0
- > quit
-
- ----------------------------------------------------------------------
-
- PANIC WHEN DOING ps -ef
-
- /u/kernel_dump> crash ps-ef_dump
- dumpfile = ps-ef_dump, namelist = /unix, outfile = stdout
- > t
- STACK TRACE FOR PROCESS 5:
- STKADDR FRAMEPTR FUNCTION POSSIBLE ARGUMENTS
- e0000c14 e0000c2c prf_task (6,d008c629,d00b0790,160)
- e0000c34 e0000c58 cmn_err (3,d00b1058,6,d00a2e7c)
- e0000c60 e0000c84 k_trap (e0000c90)
- Trap 6 e0000c90 cmntrap from d009b6da in ttxput
- ax: 65 cx: 37 dx: 40eebe bx: 1805 fl: 10213 ds: 160 fs: 0
- sp:e0000cc0 bp:e0000d04 si:d00a2e7c di: 65 err: 0 es: 160 gs: 0
- e0000c98 e0000d04 ttxput (d00a2e7c,d10de0a0,36,d00a2e7c)
- e0000d0c e0000d34 ttwrite (d00a2e7c,0,8228)
- e0000d3c e0000d48 vidwrite (d00cc708,0,d00c8030,96b0)
- e0000d50 e0000d64 cnwrite (0,d011325c)
- e0000d6c e0000d74 sywrite (301,2,d00c8030,d011325c)
- e0000d7c e0000db4 s5writei (d011325c,e0000e38,d00b0b30,37)
- e0000dbc e0000dec rdwr (2)
- e0000df4 e0000df8 write (40d3d0,40ee88,37,d0117868)
- e0000e00 e0000e2c systrap (e0000e38)
- e0000e38 sys_call from a00037a4
- ax: 4 cx: 0 dx: 2 bx: 37 fl: 202 ds: 1f fs: 0
- sp:e0000e68 bp:7ffffaa4 si: 40d3d0 di: 40ee88 err: 4 es: 1f gs: 0
- > quit
-
- --------------------------------------------------------------------
-
- PANIC WHEN TCP/IP STARTING UP
-
- dumpfile = tcp_dump, namelist = /unix, outfile = stdout
- t
- > STACK TRACE FOR PROCESS 10:
- STKADDR FRAMEPTR FUNCTION POSSIBLE ARGUMENTS
- e0000c14 e0000c2c prf_task (6,d008c629,d00b0790,160)
- e0000c34 e0000c58 cmn_err (3,d00b1058,6,d00a2e7c)
- e0000c60 e0000c84 k_trap (e0000c90)
- Trap 6 e0000c90 cmntrap from d009b6da in ttxput
- ax: 66 cx: 0 dx: 0 bx: 1805 fl: 10213 ds: 160 fs: 0
- sp:e0000cc0 bp:e0000d04 si:d00a2e7c di: 66 err: 0 es: 160 gs: 0
- e0000c98 e0000d04 ttxput (d00a2e7c,66,0,d00a2e7c)
- e0000d0c e0000d34 ttwrite (d00a2e7c,0,dbc)
- e0000d3c e0000d48 vidwrite (d00cc708,0,d00c8084,ec00)
- e0000d50 e0000d64 cnwrite (0,d011325c)
- e0000d6c e0000d74 sywrite (301,2,d00c8084,d011325c)
- e0000d7c e0000db4 s5writei (d011325c,e0000e38,d00b0b30,8)
- e0000dbc e0000dec rdwr (2)
- e0000df4 e0000df8 write (4006e0,4013a0,8,4005a8)
- e0000e00 e0000e2c systrap (e0000e38)
- e0000e38 sys_call from a00037a4
- ax: 4 cx: 0 dx: 0 bx: 8 fl: 202 ds: 1f fs: 0
- sp:e0000e68 bp:7ffffa7c si: 4006e0 di: 4013a0 err: 4 es: 1f gs: 0
- > quit
-
- --
- Bruce Momjian | 830 Blythe Avenue
- root%candle.uucp@bts.com | Drexel Hill, Pennsylvania 19026
- | (215) 353-9879(w) 853-3000(h)
-