Re: cmd64x: irq 14: nobody cared - system is dreadfully slow

[Frans Pop <elendil@planet.nl>]

On Sunday 21 June 2009, David Miller wrote:
> From: Frans Pop <elendil@planet.nl>
> Date: Sat, 20 Jun 2009 23:52:33 +0200
>
> > ide0 at 0x1fe02c00000-0x1fe02c00007,0x1fe02c0000a on irq 14
> > (serialized) irq 14: nobody cared (try booting with the "irqpoll"
> > option) Call Trace:
[...]
> diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
> index 80b777e..f98ba24 100644
> --- a/drivers/ide/cmd64x.c
> +++ b/drivers/ide/cmd64x.c
> @@ -425,8 +425,7 @@ static const struct ide_port_info cmd64x_chipsets[]
> __devinitdata = { .enablebits	= {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
>  		.port_ops	= &cmd64x_port_ops,
>  		.dma_ops	= &cmd648_dma_ops,
> -		.host_flags	= IDE_HFLAG_SERIALIZE |
> -				  IDE_HFLAG_ABUSE_PREFETCH,
> +		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH,
>  		.pio_mask	= ATA_PIO5,
>  		.mwdma_mask	= ATA_MWDMA2,
>  		.udma_mask	= ATA_UDMA2,

This patch (tested on top of 2.6.30) gets rid of one of the two "nobody cared"
errors and also makes the system run at normal speed again. But I'm still
left with one error:

cmd64x 0000:01:03.0: IDE controller (0x1095:0x0646 rev 0x03)
cmd64x 0000:01:03.0: 100% native mode on irq 14
    ide0: BM-DMA at 0x1fe02c00020-0x1fe02c00027
    ide1: BM-DMA at 0x1fe02c00028-0x1fe02c0002f
hda: ST34342A, ATA DISK drive
hda: MWDMA2 mode selected
hdc: Maxtor 6E040L0, ATA DISK drive
hdd: CD-ROM 56X/AKH, ATAPI CD/DVD-ROM drive
hdc: MWDMA2 mode selected
hdd: bad DMA info in identify block
ide0 at 0x1fe02c00000-0x1fe02c00007,0x1fe02c0000a on irq 14
irq 14: nobody cared (try booting with the "irqpoll" option)
Call Trace:
 [000000000048b594] note_interrupt+0x160/0x1e8
 [000000000048bcc4] handle_fasteoi_irq+0x9c/0xc8
 [0000000000429e60] handler_irq+0xb0/0xe8
 [00000000004208b4] tl0_irq5+0x14/0x20
 [0000000000455e80] __do_softirq+0x58/0x17c
 [0000000000429d84] do_softirq+0x50/0x7c
 [0000000000455bb0] irq_exit+0x38/0x88
 [000000000042e710] timer_interrupt+0x70/0x88
 [00000000004209d4] tl0_irq14+0x14/0x20
 [000000000048ae04] request_threaded_irq+0x64/0x12c
 [00000000005ff3c4] ide_host_register+0x4e4/0x6a8
 [00000000006044bc] ide_pci_init_one+0xc8/0xf8
 [000000001001271c] cmd64x_init_one+0x88/0x9c [cmd64x]
 [0000000000588cb4] local_pci_probe+0x10/0x24
 [0000000000588e38] pci_device_probe+0x4c/0x84
 [00000000005ee2c8] driver_probe_device+0xa0/0x164
handlers:
[<00000000005fb72c>] (ide_intr+0x8/0x234)
Disabling IRQ #14
ide1 at 0x1fe02c00010-0x1fe02c00017,0x1fe02c0001a on irq 14

I tried the following additional patch, but unfortunately that did not help:
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -426,6 +426,7 @@ static const struct ide_port_info cmd64x_chipsets[]
 		.port_ops	= &cmd64x_port_ops,
 		.dma_ops	= &cmd648_dma_ops,
 		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH,
+		.irq_flags	= IRQF_SHARED,
 		.pio_mask	= ATA_PIO5,
 		.mwdma_mask	= ATA_MWDMA2,
 		.udma_mask	= ATA_UDMA2,

I got the idea for that from 255115fb and had hoped it would compensate
for this change from Bart's commit:
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1125,7 +1125,7 @@ static int init_irq (ide_hwif_t *hwif)
                sa = IRQF_SHARED;
 #endif /* __mc68000__ */

-               if (hwif->chipset == ide_pci || hwif->chipset == ide_cmd646)
+               if (hwif->chipset == ide_pci)
                        sa = IRQF_SHARED;

> Alternatively you can try using the pata_cmd64x.c driver instead :-)

That one works fine :-)

Cheers,
FJP