Tyan 2466 SMP lock with 2.4.21-rc1, HIGHMEM + heavy disk i/o

From: Dirk Eddelbuettel (edd@debian.org)
Date: Sat May 10 2003 - 08:42:15 EST


System:
  Tyan 2466 MPX board, 2 Athlon 1800MP, bios 1.01 from March 2002
  1 gb ram, ibm + maxtor ide disks, ide cdrom + cdrw
  ati rage 128, sb pci 128, on-board 3c905 nic, ps/2 mouse
  no other cards
  hardware configuration unaltered since June of last year

Enabling or disabling the HIGHME patch is enough to trigger/suppress
hard locking. When HIGHMEM is enabled, locking occurs very easily when
trying to copy a (cloop-mounted) Knoppix image, or even when compiling
a kernel.

I run fairly stock kernels (from Debian kernel source packages) with the
win4lin patch as the only external patch. ACPI is disabled. Disk access is
not tuned in any way, DMA gets enabled by default.

Dirk

-- 
Don't drink and derive. Alcohol and algebra don't mix.
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