From: William Lee Irwin III <wli@holomorphy.com>
To: Robert Love <rml@tech9.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] compile-time configurable NR_CPUS
Date: Thu, 29 Aug 2002 14:56:46 -0700 [thread overview]
Message-ID: <20020829215646.GI888@holomorphy.com> (raw)
In-Reply-To: <1030657461.11553.2693.camel@phantasy>
On Thu, 2002-08-29 at 17:42, William Lee Irwin III wrote:
>> Could you make CONFIG_NR_CPUS only for non-NUMA-Q systems and hardwire
>> it to 32 for NUMA-Q, as the bugs in io_apic.c don't have fixes yet and
>> NUMA-Q's have enough IO-APIC's to trigger the bugs.
On Thu, Aug 29, 2002 at 05:44:20PM -0400, Robert Love wrote:
> Linus has not shown any interest in merging, so it is a non-issue at the
> moment...
devfs doesn't hold a candle to io_apic.c
I did 3 runs on a 32x last night, and got 3 panics not present in 2.4:
(1) "Recompile kernel with bigger MAX_IO_APICS!.\n",
so I bumped up MAX_IO_APICS to "impossibly huge"
(2) "Max APIC ID exceeded!\n", so I removed the physid reprogramming
(3) "ran out of interrupt sources!",
and I chugged a stiff drink, gave up, & went to bed (this is evil)
Reducing NR_CPUS tends to trigger some kind of physical APIC ID
reprogramming panic() (msg #2 above) that doesn't normally happen.
Cheers,
Bill
prev parent reply other threads:[~2002-08-29 22:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-29 15:33 [PATCH] compile-time configurable NR_CPUS Robert Love
2002-08-29 21:42 ` William Lee Irwin III
2002-08-29 21:44 ` Robert Love
2002-08-29 21:56 ` William Lee Irwin III [this message]
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