Messages in this thread | | | From | (Eric W. Biederman) | Subject | Re: [PATCH] x86_64: Auto size the per cpu area. | Date | Tue, 08 Aug 2006 00:31:06 -0600 |
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Andrew Morton <akpm@osdl.org> writes:
> On Mon, 07 Aug 2006 23:47:23 -0600 > ebiederm@xmission.com (Eric W. Biederman) wrote: > >> +#ifdef CONFIG_MODULES >> +# define PERCPU_MODULE_RESERVE 8192 >> +#else >> +# define PERCPU_MODULE_RESERVE 0 >> +#endif >> + >> +#define PERCPU_ENOUGH_ROOM \ >> + (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \ >> + PERCPU_MODULE_RESERVE) >> + > > Seems sane, but isn't 8192 a bit small?
By my measure 8K is about 1/2KB less than what we have free in 2.6.18-rc3. So it looks like a good initial guess to me.
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