Messages in this thread | | | Date | Thu, 17 May 2007 10:45:00 +0200 (CEST) | From | Geert Uytterhoeven <> | Subject | Re: Slab allocators: Define common size limitations |
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On Wed, 16 May 2007, Arnd Bergmann wrote: > On Wednesday 16 May 2007, Geert Uytterhoeven wrote: > > What are the changes a large allocation will actually succeed? > > Is there an alignment rule for large allocations? > > > > E.g. for one of the PS3 drivers I need a physically contiguous 256 KiB-aligned > > block of 256 KiB. Currently I'm using __alloc_bootmem() for that, but maybe > > kmalloc() becomes a suitable alternative now? > > kmalloc is limited to 128KiB on most architectures. Normally there is no > need to use it anyway, just use __get_free_pages(). It will generally > succeed at early boot time, but not after the system has been running > for some time.
Exactly my understanding. And __get_free_pages() returns PAGE_SIZE-aligned memory. So I'll keep the current code.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE) Geert.Uytterhoeven@sonycom.com ------- The Corporate Village, Da Vincilaan 7-D1 Voice +32-2-7008453 Fax +32-2-7008622 ---------------- B-1935 Zaventem, Belgium - 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/
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