Messages in this thread | | | Date | Tue, 5 Nov 2002 23:13:30 -0500 | From | Adam Kropelin <> | Subject | 2.5.46: ide-cd cdrecord (almost) success report |
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I felt like making some coasters tonight so I figured it was a good time to give ide-cd a chance with cdrecord. For the most part, it worked great! I was stunned, in fact, by how smoothly it went after I upgraded my cdtools. I was running SMP + preempt and it wrote smoothly at 12x with < 2% CPU usage the whole time. Buffer capacity never dropped below 98%.
I was almost disappointed at not making any coasters so I decided to stress it a bit. I tried running 'make -j10 bzImage' on the 2.5.46 kernel tree while it was writing and that also worked! Buffer never dropped below 96%. (This machine is 2x Xeon 450, 256 MB RAM, BTW.)
Still without coaster I tried one more thing... 'dd if=/dev/zero of=foo bs=1M' in parallel with another burn. That one did it in. ;) I'm running ext3 and the writeout load totally killed burn, which isn't surprising. I was asking for it, I know. What happened when the cdrecord buffer underran was surprising, though: oops below. Very repeatable. Can supply copious hw details if it helps.
--Adam
Unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip: c02464ad *pde = 00000000 Oops: 0000 eepro100 mii CPU: 0 EIP: 0060:[<c02464ad>] Not tainted EFLAGS: 00010006 EIP is at ide_outsw+0xd/0x20 eax: 00007c00 ebx: 0000f801 ecx: 00007c00 edx: 00000170 esi: 00000000 edi: c0557d74 ebp: 00000000 esp: c04bfeb0 ds: 0068 es: 0068 ss: 0068 Process swapper (pid: 0, threadinfo=c04be000 task=c0491900) Stack: c0557e20 c02469aa 00000170 00000000 00007c00 0000f801 c0557e20 c0557d74 00000000 c0246a7c c0557e20 00000000 00003e00 0000f800 c13820e0 00000000 c0557e20 c025571c c0557e20 00000000 0000f800 c13ad3a0 c0246a40 0000f800 Call Trace: [<c02469aa>] ata_output_data+0xba/0xc0 [<c0246a7c>] atapi_output_bytes+0x3c/0x90 [<c025571c>] cdrom_newpc_intr+0x2ac/0x4e0 [<c0246a40>] atapi_output_bytes+0x0/0x90 [<c024cee4>] ide_intr+0x124/0x1e0 [<c0255470>] cdrom_newpc_intr+0x0/0x4e0 [<c010b595>] handle_IRQ_event+0x45/0x70 [<c010b834>] do_IRQ+0xb4/0x150 [<c0107070>] default_idle+0x0/0x50 [<c0107070>] default_idle+0x0/0x50 [<c0109e88>] common_interrupt+0x18/0x20 [<c0107070>] default_idle+0x0/0x50 [<c0107070>] default_idle+0x0/0x50 [<c010709a>] default_idle+0x2a/0x50 [<c010713a>] cpu_idle+0x3a/0x50 [<c0105000>] stext+0x0/0x30
Code: f3 66 6f 5e c3 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 8b <0>Kernel panic: Aiee, killing interrupt handler! In interrupt handler - not syncing
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