Messages in this thread | | | Subject | Re: using kmalloc | Date | Wed, 20 Mar 2002 10:27:09 +0000 (GMT) | From | Alan Cox <> |
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> To allocate more memory, use vmalloc(), which allocates and maps physically > disjoint pages into a virtually-contiguous region. Be careful when doing DMA > to a vmalloc() area, since it is not physically contiguous and exists only > in the kernel's virtual memory map... Also I believe vmalloc()ed memory is > only accessible from (the context of) the process in which it was allocated > (?).
vmalloc memory is accessible everywhere. You can't allocate it during interrupts or tasklets, and you will get deadlocks if you allocate it in the write out path of a file system/disk driver.
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