Messages in this thread | | | Date | Fri, 5 Dec 2003 15:12:14 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: HT apparently not detected properly on 2.4.23 |
| |
On Wed, 3 Dec 2003, William Lee Irwin III wrote:
> William Lee Irwin III wrote: > >>You probably have sparse physical APIC ID's. > > On Wed, Dec 03, 2003 at 06:41:36PM -0500, Ethan Weinstein wrote: > > Ok, setting CONFIG_NR_CPUS=8 does indeed solve the HT issue, looks like > > it was the numbering scheme: > > It's easy to fix this; just terminate the loop when the count of cpus > kicked hits NR_CPUS or the bit would overflow the map instead of the bit > hitting NR_CPUS. Compare smpboot.c in 2.4 vs. 2.6. No need for the extra > CONFIG_NR_CPUS bloat. > > > On Wed, Dec 03, 2003 at 06:41:36PM -0500, Ethan Weinstein wrote: > > But we're still only interrupting on CPU0 with this kernel. > > That's P-IV retardation. Not really fixable, but irqbalance daemons > etc. can help mitigate the severity of the erratum. I'm not sure if > 2.4 has the interfaces for the userspace solutions to work or the > kernel solutions either.
I think I will just remove CONFIG_NR_CPUS instead... it seems to bring more trouble than advantages.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |