bug in libata [was Re: [BUG] ide dma_timer_expiry, then hard lockup

Linas Vepstas
2007-06-19T14:56:23Z

On Mon, Jun 18, 2007 at 04:22:38PM -0500, linas wrote:
> On Mon, Jun 18, 2007 at 10:04:41PM +0100, Alan Cox wrote:
> > please try using the libata
> > driver.

Its worse. I get a hard hang (sysrq doesn't work) during boot,
just when the system goes to read the partition table.

Recap: this is an older dual cpu intel box, with a vintage
HTP366 (and not a newer HPT370) on the system planar. I'm
testing a configration that works fine with the old ide
drivers.

It looks like libata and scsi comes up. The disk is correctly
recognized; i.e. its brand, model number & size are correctly
reported. printk shows that it hangs in msdos_partition, trying
to read the partition table. The drive light is on full-solid,
again suggesting a possible irq storm.

Same behaviour for both 2.6.22-rc5-git1 and for 2.6.22-rc4-mm2

I seem to have trouble turning on scsi logging; it doesn't
seem to generate any output ...

Any suggestions on how to proceed?

--linas