Re: ATA_PIIX - soft resetting port, port is slow to respond, machine "freezes" for a few seconds

[Tomasz Chmielewski <mangoo@wpkg.org>]

Joris schrieb:
> Hello Tomasz,
> 
> 
> This appears remarkably simelar to what I'm experiencing, altough I'm
> getting that on sata ports.
> I'm currently at a loss on what caused this, but if there's two of us... ;-)
> See: http://marc.info/?l=linux-ide&m=118812690407577&w=2
> 
> What kind of hardware are you running?

It's a dual core Xeon.

Root filesystem starts off a 2 GB Transcend IDE flash disk, and there is 
a 4-disk RAID-10 array behind a hardware RAID, with LVM on it.

I noticed it doesn't soft reset anymore once the kernel said:

ata1.00: limiting speed to MWDMA1:PIO4


# lspci
00:00.0 Host bridge: Intel Corporation E7320 Memory Controller Hub (rev 0c)
00:00.1 Class ff00: Intel Corporation E7320 Error Reporting Registers 
(rev 0c)
00:02.0 PCI bridge: Intel Corporation E7525/E7520/E7320 PCI Express Port 
A (rev 0c)
00:03.0 PCI bridge: Intel Corporation E7525/E7520/E7320 PCI Express Port 
A1 (rev 0c)
00:1c.0 PCI bridge: Intel Corporation 6300ESB 64-bit PCI-X Bridge (rev 02)
00:1d.0 USB Controller: Intel Corporation 6300ESB USB Universal Host 
Controller (rev 02)
00:1d.1 USB Controller: Intel Corporation 6300ESB USB Universal Host 
Controller (rev 02)
00:1d.4 System peripheral: Intel Corporation 6300ESB Watchdog Timer (rev 02)
00:1d.5 PIC: Intel Corporation 6300ESB I/O Advanced Programmable 
Interrupt Controller (rev 02)
00:1d.7 USB Controller: Intel Corporation 6300ESB USB2 Enhanced Host 
Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 0a)
00:1f.0 ISA bridge: Intel Corporation 6300ESB LPC Interface Controller 
(rev 02)
00:1f.1 IDE interface: Intel Corporation 6300ESB PATA Storage Controller 
(rev 02)
00:1f.3 SMBus: Intel Corporation 6300ESB SMBus Controller (rev 02)
01:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet 
Controller (rev 06)
01:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet 
Controller (rev 06)
03:02.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID (rev 01)
04:02.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
04:04.0 SCSI storage controller: Adaptec AHA-2940U/UW/D / AIC-7881U (rev 01)


-- 
Tomasz Chmielewski
http://wpkg.org