On Sun, 20 Mar 2005 at 4:25pm, Robin Humble wrote
> I hammered a standard fc3 kernel (4k stacks) and couldn't break it.
> I ran 4 simultaneous bonnie++'s locally, and 8 more over NFS using two
> gigabit ethernet links. No software raid, no lvm, no quotas, default
> mount options, etc. just XFS on a 2.3TB partition of a 3ware 9000
> SATA hardware raid5. Machine was a dual 2.66GHz Xeon with 2G of ram.
> kernel was kernel-smp-2.6.10-1.770_FC3, userland was RHEL AS4.
> I filled up the disk several times with dd's and bonnie's and saw no
> signs of problems there either.
> So that's one extra data point for a relatively simple config that says
> XFS and 4k stacks is pretty stable.
Hrm. I had exactly the opposite experience. My testbed was far older
(and simpler) -- dual PIII 450, 384MB RAM, AIC-7890 controller and 2 SCSI
disks (not in any sort of RAID or anything). I was running RHEL4 on it
with the kernel modified simply to turn on XFS support.
'tiobench --size 2047' would reliably produce stack overflows.
Department of Biomedical Engineering