Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: Slab allocators: Define common size limitations | Date | Wed, 16 May 2007 23:42:07 +0200 |
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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.
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