Messages in this thread |  | | Date | Mon, 30 Oct 2000 13:10:47 -0500 | From | Jeff Garzik <> | Subject | Re: kmalloc() allocation. |
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"Richard B. Johnson" wrote: > > On Mon, 30 Oct 2000, Jeff Garzik wrote: > > > "Richard B. Johnson" wrote: > > > Now, I could set up a linked-list of buffers and use vmalloc() > > > if the buffers were allocated from non-paged RAM. I don't think > > > they are. These buffers must be present during an interrupt. > > > > Non-paged RAM? I'm not sure what you mean by that. > > > > Both kmalloc and vmalloc allocate pages, but neither will allocate pages > > that the system will swap out (page out). [vk]malloc pages are always > > around during an interrupt. > > > > Jeff > > Hmm, vmalloc() doesn't seem to have the size limitation. Are you sure > that it's present during an interrupt? I can't page-fault during the > interrupt.
vmalloc'd memory does have a size limitation, though it's larger than kmalloc's limit. AFAIK vmalloc'd memory is a collection of pages remapping in the page tables to be virtually contiguous, implying that it is present during an interrupt.
-- Jeff Garzik | "Mind if I drive?" -Sam Building 1024 | "Not if you don't mind me clawing at the MandrakeSoft | dash and shrieking like a cheerleader." | -Max - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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