Hi all,
I just built 2.4.19 and checked that the problem that had been
introduced in the aha152x driver between 2.4.19-pre8 and pre10 (bad
initialization due to lost interrupt) had been corrected. However, I
have experienced another problem related to blocking factor.
Using tar without specifying a blocking factor works fine but as soon
as I specify one, tar exits with a segmentation violation immediately
after trying to write to the tape. There is a also a message about a
NULL pointer dereference written to /var/log/messages (see below).
The exact command I used is (taken from a shell script):
tar --create --blocking-factor 96 --file=/dev/st0 --listed-incremental=$JOURNAL --verbose --preserve --one-file-system --atime-preserve $1
The very same script worked flawlessly with 2.4.19-pre8 and before. If
I remove the blocking-factor option, everything is back to normal.
Marc
----------------------------------------------------------------------
Aug 3 17:44:55 socrate kernel: Unable to handle kernel NULL pointer dereference
at virtual address 0000001b
Aug 3 17:44:55 socrate kernel: printing eip:
Aug 3 17:44:55 socrate kernel: c68a21d9
Aug 3 17:44:55 socrate kernel: *pde = 00000000
Aug 3 17:44:55 socrate kernel: Oops: 0000
Aug 3 17:44:55 socrate kernel: CPU: 0
Aug 3 17:44:55 socrate kernel: EIP: 0010:[<c68a21d9>] Not tainted
Aug 3 17:44:55 socrate kernel: EFLAGS: 00010002
Aug 3 17:44:55 socrate kernel: eax: 00000000 ebx: c2575000 ecx: c26e9e30
edx: c1d9a240
Aug 3 17:44:55 socrate kernel: esi: c251c000 edi: 0000000c ebp: c251c000
esp: c2691e4c
Aug 3 17:44:55 socrate kernel: ds: 0018 es: 0018 ss: 0018
Aug 3 17:44:55 socrate kernel: Process tar (pid: 1141, stackpage=c2691000)
Aug 3 17:44:55 socrate kernel: Stack: 00000297 c116fdb4 c2575000 c68a22e3 c2575
000 00000000 00000000 00000000
Aug 3 17:44:55 socrate kernel: c687fab0 c687f517 c2575000 c687fab0 00000
000 c2575000 c116fdb4 c25750b8
Aug 3 17:44:55 socrate kernel: c116fdb4 c688662f c2575000 c2575000 00000
000 c251c000 c5995c00 c116fd60
Aug 3 17:44:55 socrate kernel: Call Trace: [<c68a22e3>] [<c687fab0>] [<c687f
517>] [<c687fab0>] [<c688662f>]
Aug 3 17:44:55 socrate kernel: [<c6885a5f>] [<c6885ab9>] [<c68984cc>] [<c6898
300>] [<c6899ce6>] [<c0132bc8>]
Aug 3 17:44:55 socrate kernel: [<c013266f>] [<c01088b3>]
Aug 3 17:44:55 socrate kernel:
Aug 3 17:44:55 socrate kernel: Code: 0f b6 50 1b 8b 14 95 dc 24 27 c0 2b 82 a0
00 00 00 69 c0 a3
On Sat, 2002-08-03 at 18:02, Marc Lefranc wrote:
>------------------------------------------------
> Aug 3 17:44:55 socrate kernel: Unable to handle kernel NULL pointer dereference
> at virtual address 0000001b
> Aug 3 17:44:55 socrate kernel: printing eip:
> Aug 3 17:44:55 socrate kernel: c68a21d9
> Aug 3 17:44:55 socrate kernel: *pde = 00000000
> Aug 3 17:44:55 socrate kernel: Oops: 0000
> Aug 3 17:44:55 socrate kernel: CPU: 0
> Aug 3 17:44:55 socrate kernel: EIP: 0010:[<c68a21d9>] Not tainted
> Aug 3 17:44:55 socrate kernel: EFLAGS: 00010002
> Aug 3 17:44:55 socrate kernel: eax: 00000000 ebx: c2575000 ecx: c26e9e30
> edx: c1d9a240
You need to run through the oops through the ksymoops decoder (see
REPORTING-BUGS in the kernel)
On 03 Aug 2002 23:35:14 +0100,
Alan Cox <[email protected]> wrote :
> You need to run through the oops through the ksymoops decoder (see
> REPORTING-BUGS in the kernel)
Sorry about that. Here is a new one:
Aug 4 01:51:14 socrate kernel: Unable to handle kernel NULL pointer dereference at virtual address 0000001b
Aug 4 01:51:14 socrate kernel: c68a21d9
Aug 4 01:51:14 socrate kernel: *pde = 00000000
Aug 4 01:51:14 socrate kernel: Oops: 0000
Aug 4 01:51:14 socrate kernel: CPU: 0
Aug 4 01:51:14 socrate kernel: EIP: 0010:[<c68a21d9>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Aug 4 01:51:14 socrate kernel: EFLAGS: 00010006
Aug 4 01:51:14 socrate kernel: eax: 00000000 ebx: c2738000 ecx: c30a5e30 edx: c5c58b20
Aug 4 01:51:14 socrate kernel: esi: c5319000 edi: 0000000c ebp: c5319000 esp: c29dde30
Aug 4 01:51:14 socrate kernel: ds: 0018 es: 0018 ss: 0018
Aug 4 01:51:14 socrate kernel: Process tar (pid: 1120, stackpage=c29dd000)
Aug 4 01:51:14 socrate kernel: Stack: 00000297 c116feb4 c2738000 c68a22e3 c2738000 00000000 00000000 00000000
Aug 4 01:51:14 socrate kernel: c687fab0 c687f517 c2738000 c687fab0 00000000 c2738000 c116feb4 c27380b8
Aug 4 01:51:14 socrate kernel: c116feb4 c688662f c2738000 c2738000 00000000 c5319000 c59d3c00 c116fe60
Aug 4 01:51:14 socrate kernel: Call Trace: [<c68a22e3>] [<c687fab0>] [<c687f517>] [<c687fab0>] [<c688662f>]
Aug 4 01:51:14 socrate kernel: [<c6885a5f>] [<c6885ab9>] [<c68984cc>] [<c6898300>] [<c6899e99>] [<c689a4e0>]
Aug 4 01:51:14 socrate kernel: [<c0132ac8>] [<c01394a5>] [<c01088b3>]
Aug 4 01:51:14 socrate kernel: Code: 0f b6 50 1b 8b 14 95 dc 24 27 c0 2b 82 a0 00 00 00 69 c0 a3
>>EIP; c68a21d9 <[aha152x]aha152x_internal_queue+f9/1f0> <=====
Trace; c68a22e3 <[aha152x]aha152x_queue+13/20>
Trace; c687fab0 <[scsi_mod]scsi_done+0/90>
Trace; c687f517 <[scsi_mod]__kstrtab_scsi_deregister_blocked_host+17/27>
Trace; c687fab0 <[scsi_mod]scsi_done+0/90>
Trace; c688662f <[scsi_mod]scsi_request_fn+2bf/300>
Trace; c6885a5f <[scsi_mod]__scsi_insert_special+5f/70>
Trace; c6885ab9 <[scsi_mod]scsi_insert_special_req+19/30>
Trace; c68984cc <[st]st_do_scsi+10c/150>
Trace; c6898300 <[st]st_sleep_done+0/c0>
Trace; c6899e99 <[st]read_tape+119/390>
Trace; c689a4e0 <[st]st_read+3d0/500>
Trace; c0132ac8 <sys_read+98/100>
Trace; c01394a5 <sys_stat64+65/70>
Trace; c01088b3 <system_call+33/40>
Code; c68a21d9 <[aha152x]aha152x_internal_queue+f9/1f0>
00000000 <_EIP>:
Code; c68a21d9 <[aha152x]aha152x_internal_queue+f9/1f0> <=====
0: 0f b6 50 1b movzbl 0x1b(%eax),%edx <=====
Code; c68a21dd <[aha152x]aha152x_internal_queue+fd/1f0>
4: 8b 14 95 dc 24 27 c0 mov 0xc02724dc(,%edx,4),%edx
Code; c68a21e4 <[aha152x]aha152x_internal_queue+104/1f0>
b: 2b 82 a0 00 00 00 sub 0xa0(%edx),%eax
Code; c68a21ea <[aha152x]aha152x_internal_queue+10a/1f0>
11: 69 c0 a3 00 00 00 imul $0xa3,%eax,%eax
And while we are at it, here is the information from the driver as it
starts
Aug 4 01:51:11 socrate kernel: SCSI subsystem driver Revision: 1.00
Aug 4 01:51:12 socrate kernel: aha152x: BIOS test: passed, detected 1 controller(s)
Aug 4 01:51:12 socrate kernel: aha152x: resetting bus...
Aug 4 01:51:12 socrate kernel: aha152x0: vital data: rev=1, io=0x140 (0x140/0x140), irq=11, scsiid=7, reconnect=enabled, parity=enabled, synchronous=enabled, delay=1000, extended translation=disabled
Aug 4 01:51:12 socrate kernel: aha152x0: trying software interrupt, ok.
Aug 4 01:51:12 socrate kernel: scsi0 : Adaptec 152x SCSI driver; $Revision: 2.5 $
Aug 4 01:51:13 socrate kernel: (scsi0:3:0) Synchronous Data Transfer Request period = 200 ns, offset = 8
Aug 4 01:51:13 socrate kernel: Vendor: HP Model: C1533A Rev: A812
Aug 4 01:51:13 socrate kernel: Type: Sequential-Access ANSI SCSI revision: 02
Aug 4 01:51:14 socrate kernel: st: Version 20020205, bufsize 32768, wrt 30720, max init. bufs 4, s/g segs 16
Aug 4 01:51:14 socrate kernel: Attached scsi tape st0 at scsi0, channel 0, id 3, lun 0
Aug 4 01:51:14 socrate kernel: st0: Block limits 1 - 16777215 bytes.
Hi Marc,
On Sat, Aug 03, 2002 at 19:02:50 +0200, Marc Lefranc wrote:
> I just built 2.4.19 and checked that the problem that had been
> introduced in the aha152x driver between 2.4.19-pre8 and pre10 (bad
> initialization due to lost interrupt) had been corrected. However, I
> have experienced another problem related to blocking factor.
I posted another patch a while ago. Obviously it didn't make it into
2.4.19. So this is the same thing against 2.4.19.
It fixes your problem and another one related to longtaking tape
operations.
Juergen
--- orig/linux/drivers/scsi/aha152x.c 2002-08-04 13:26:14.000000000 +0200
+++ linux-2.4/drivers/scsi/aha152x.c 2002-07-19 00:10:35.000000000 +0200
@@ -602,7 +602,11 @@
#define SCDONE(SCpnt) SCDATA(SCpnt)->done
#define SCSEM(SCpnt) SCDATA(SCpnt)->sem
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+#define SG_ADDRESS(buffer) ((buffer)->address)
+#else
#define SG_ADDRESS(buffer) ((char *) (page_address((buffer)->page)+(buffer)->offset))
+#endif
/* state handling */
static void seldi_run(struct Scsi_Host *shpnt);
@@ -2657,7 +2661,7 @@
* STCNT to trigger ENSWRAP interrupt, instead of
* polling for DFIFOFULL
*/
- the_time=jiffies + 10*HZ;
+ the_time=jiffies + 100*HZ;
while(TESTLO(DMASTAT, DFIFOFULL|INTSTAT) && time_before(jiffies,the_time))
barrier();
@@ -2670,7 +2674,7 @@
if(TESTHI(DMASTAT, DFIFOFULL)) {
fifodata = 128;
} else {
- the_time=jiffies + 10*HZ;
+ the_time=jiffies + 100*HZ;
while(TESTLO(SSTAT2, SEMPTY) && time_before(jiffies,the_time))
barrier();
@@ -2826,7 +2830,7 @@
CURRENT_SC->SCp.this_residual = CURRENT_SC->SCp.buffer->length;
}
- the_time=jiffies + 10*HZ;
+ the_time=jiffies + 100*HZ;
while(TESTLO(DMASTAT, DFIFOEMP|INTSTAT) && time_before(jiffies,the_time))
barrier();