Re: 2.6.2-rc2 Interactivity problems with SMP + HT

[Nick Piggin]

Catalin BOIE wrote:

> Hello!
>
> First, thank you very much for the effort you put for Linux!
>
> I have a Intel motherboard with SATA (2 Maxtor disks).
> CPUs: 2 x 2.4GHz PIV HT = 4 processors (2 virtual)
> 1 GB RAM.
>
> Load: postgresql and apache. Very low load (3-4 clients).
>
> RAID: Yes, soft RAID1 between the 2 disks.
>
> I have times when the console freeze for 3-4 seconds!
> 2.6.0-test11 had the same problem (maybe longer times).
> 2.6.1-rc2 worked good in this respect but crashed after 2 days. :(
> 2.6.2-rc2 is back with the delay.
>
> Do you know why this can happen?

There haven't been many scheduler changes there recently so
maybe its something else.

But you could try the latest -mm kernels. They have some
Hyperthreading work in them (you need to enable CONFIG_SCHED_SMT).

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