From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [RFC][WIP][PATCH] Add IRQSTACKS to ppc32
Date: Thu, 24 Apr 2008 17:18:57 +1000 [thread overview]
Message-ID: <1209021537.9060.156.camel@pasglop> (raw)
In-Reply-To: <Pine.LNX.4.64.0804240034160.23185@blarg.am.freescale.net>
On Thu, 2008-04-24 at 00:37 -0500, Kumar Gala wrote:
> + /*
> + * interrupt stacks must be under 256MB, we cannot afford to
> take
> + * SLB misses on them.
> + */
> + for_each_possible_cpu(i) {
> + softirq_ctx[i] = (struct thread_info *)
> + __va(lmb_alloc_base(THREAD_SIZE,
> + THREAD_SIZE, 0x10000000));
> + hardirq_ctx[i] = (struct thread_info *)
> + __va(lmb_alloc_base(THREAD_SIZE,
> + THREAD_SIZE, 0x10000000));
> + }
> +
The comment is a bit bogus :-) (about SLB misses). lowmem is your limit
I think. Also, why not share the code with ppc64 ?
Ben.
next prev parent reply other threads:[~2008-04-24 7:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-24 5:37 [RFC][WIP][PATCH] Add IRQSTACKS to ppc32 Kumar Gala
2008-04-24 7:18 ` Benjamin Herrenschmidt [this message]
2008-04-24 12:59 ` Kumar Gala
2008-04-24 14:53 ` Benjamin Herrenschmidt
2008-04-24 16:25 ` Kumar Gala
2008-04-25 7:23 ` Christoph Hellwig
2008-04-25 13:03 ` Benjamin Herrenschmidt
2008-04-25 13:37 ` Kumar Gala
2008-04-25 22:56 ` Paul Mackerras
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