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[Bug 345442] New: ata_piix much slower with 2.6.24-rc3-git3-20071201095839
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Sun, 2 Dec 2007 05:56:56 -0700 (MST)
  • Message-id: <bug-345442-21960@xxxxxxxxxxxxxxxxxxxxxxxxx/>
https://bugzilla.novell.com/show_bug.cgi?id=345442

Summary: ata_piix much slower with 2.6.24-rc3-git3-20071201095839
Product: openSUSE 11.0
Version: unspecified
Platform: i386
OS/Version: openSUSE 11.0
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Kernel
AssignedTo: kernel-maintainers@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: roland.kletzing@xxxxxxxxxx
QAContact: qa@xxxxxxx
Found By: Other


hi!

i have updated my opensuse 10.3 to the latest kotd kernelpackage because of
hibernate resume problems (which fixed the problem) but i have a new minor
issue now:

booting is noticeably slower.

with 2.6.22.12-0.1 i don`t have noticeable delays on boot.
with 2.6.24-rc3-git[2|3]-20071201095839 booting is more then 20 seconds slower.

seems that delays occur when ata_piix is initializing - this is how it looks
like:

<6>[ 24.729582] scsi0 : ata_piix
<6>[ 24.729776] scsi1 : ata_piix
<6>[ 24.730636] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x1c20 irq
14
<6>[ 24.730725] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x1c28 irq
15

( >10s wait here)

<6>[ 24.891676] ata1.00: ATA-6: ST92011A, 3.04, max UDMA/100
<6>[ 24.891762] ata1.00: 39070080 sectors, multi 16: LBA48
<6>[ 24.907602] ata1.00: configured for UDMA/100

( another >10s wait here)

<5>[ 25.063352] scsi 0:0:0:0: Direct-Access ATA ST92011A
3.04 PQ: 0 ANSI: 5
<6>[ 25.121054] BIOS EDD facility v0.16 2004-Jun-25, 6 devices found
<4>[ 25.210990] Clocksource tsc unstable (delta = -305874222 ns)

maybe this is due to changes in ata/sata layer in mainline kernel ?

regards
roland

ps:
why doesn`t timing/profiling information show the delay ?
i would have expected something like this
<6>[ 24.730725] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x1c28 irq
15
( >10s wait here)
<6>[ 34.891676] ata1.00: ATA-6: ST92011A, 3.04, max UDMA/100
maybe i`m misinterpreting the timing output?


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