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Date: Sat, 2 Aug 2008 22:40:04 -0700 From: "Yinghai Lu" <yhlu.kernel@...il.com> To: "Johannes Weiner" <hannes@...urebad.de> Cc: "Ingo Molnar" <mingo@...e.hu>, "Thomas Gleixner" <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, "Dhaval Giani" <dhaval@...ux.vnet.ibm.com>, "Mike Travis" <travis@....com>, "Andrew Morton" <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 03/25] add dyn_array support On Sat, Aug 2, 2008 at 10:39 PM, Yinghai Lu <yhlu.kernel@...il.com> wrote: > On Sat, Aug 2, 2008 at 10:31 PM, Johannes Weiner <hannes@...urebad.de> wrote: >> Hi, >> >> "Yinghai Lu" <yhlu.kernel@...il.com> writes: >> >>> On Sat, Aug 2, 2008 at 9:55 PM, Johannes Weiner <hannes@...urebad.de> wrote: >>>> Hi, >>>> >>>> "Yinghai Lu" <yhlu.kernel@...il.com> writes: >>>> >>>>> On Sat, Aug 2, 2008 at 9:03 PM, Johannes Weiner <hannes@...urebad.de> wrote: >>>>>> Hi, >>>>>> >>>>>> Yinghai Lu <yhlu.kernel@...il.com> writes: >>>>>> >>>>>>> could have crazy big arrays and allocate them in bootmem at init stage. >>>>>>> also also to allocate array according to size we need to use to avoid wasting >>>>>>> memory >>>>>>> use CONFIG_HAVE_DYN_ARRAY to enable it or not >>>>>>> >>>>>>> usage: >>>>>>> >>>>>>> |static struct irq_desc irq_desc_init __initdata = { >>>>>>> | .status = IRQ_DISABLED, >>>>>>> | .chip = &no_irq_chip, >>>>>>> | .handle_irq = handle_bad_irq, >>>>>>> | .depth = 1, >>>>>>> | .lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock), >>>>>>> |#ifdef CONFIG_SMP >>>>>>> | .affinity = CPU_MASK_ALL >>>>>>> |#endif >>>>>>> |}; >>>>>>> | >>>>>>> |static void __init init_work(void *data) >>>>>>> |{ >>>>>>> | struct dyn_array *da = data; >>>>>>> | struct irq_desc *desc; >>>>>>> | int i; >>>>>>> | >>>>>>> | desc = *da->name; >>>>>> >>>>>> Where *da->name might be NULL... >>> >>> *da->name = __alloc_bootmem_nopanic(size, da->align, phys); >> >> Exactly. Now, look up the possible return values of >> __alloc_bootmem_nopanic and we are almost there... > > 04 fix that via allocating that all together should be 05 YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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