How does the disk buffer cache work?

DISCUSSION John Bäckstrand 1 participant 1 message Jan 7, 2003

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John Bäckstrand

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2003-01-07 16:18 UTC #0 lore raw

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More details: lspci -vv output for the IDE

controller:

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00:07.1 IDE interface: Intel Corp. 82371FB PIIX IDE [Triton I] (rev 02) (prog-if 80 [Master])
Control: I/O+ Mem- BusMaster+ SpecCycle-
MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr-
DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR-

<PERR-

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Latency: 32
Region 0: [virtual] I/O ports at 01f0 Region 1: [virtual] I/O ports at 03f4 Region 2: [virtual] I/O ports at 0170 Region 3: [virtual] I/O ports at 0374 Region 4: I/O ports at 3000 [size=16]
The hdd is a 1GB ST51080A, but I dont know if its the particualr hdd that causes problems, or if its something else. A cdrom on the same channel works.

Dont

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have any other hdds to test with right now.

I saw that this mail did not connect to the right thread, so to recap: With this hdd as master on my second IDE channel, 2.4.20 hangs at the partition check, a backtrace:

lock_page
read_cache_page
read_dev_sector
handle_ide_mess
msdos_partition
check_partition
grok_partitions
register_disk
ide_geninit
ide_init
blk_dev_init
device_init
do_initcalls

There is a primary msdos partition on this drive that use the entire disk, but I also tried with a clear partition table. 2.2 slackware bootdisk is fine, DOS is fine in using the hdd. If anybody wants more info, just tell me what to do. Im not on the list so reply to me if so. I also tried lots of IDE patches but didnt help. Any specific kernel versions or kernel options I should try/disable/enable?

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John Bäckstrand